Monday, July 14, 2008

Saying the time in a global economy - Benefits of an NTP server

by Richard Williams N

The world is becoming an increasingly small. Modern technology means that it is just as easy to make a purchase from across the world as it is to buy something for our local streets.
Everything from hotels and plane tickets for jewelry and clothing can be purchased from across the world with just a mouse click away.
However, such global trade is only possible thanks to the precision clock synchronization possible through the use of UTC and NTP servers.
Just think next time you buy a plane ticket on the Internet, you may have purchased the last seat on the plane, but what would happen if someone moments later on a computer with a slower clock tried to buy the same ticket.
It is clear that the seat has been sold but not according to a computer that will verify their registration and could reach the conclusion that, as the clocks of the original transaction happened afterwards.

Such confusion could lead to chaos particularly sensitive with the passage of time and commercial transaction, as the stock exchange where millions can be made or lost in seconds.
Fortunately the world can trade in relative safety, thanks to UTC and NTP servers let everyone to operate under an exact time scale.
UTC (Coordinated Universal Time) was developed after the development of atomic clocks when they realized that previous deadlines (GMT) based on the movement of the earth, were not very accurate as Earth slows in its rotation.
Instead of UTC was developed which allows adjustments in the Earth's rotation by adding leap seconds. UTC refers to time zones with only add or subtract hours after the time as UTC +5 or UTC-3.
NTP (Network Time Protocol) was developed to allow servers to synchronize all the machines in a network simultaneously. NTP Servers are usually get their timing reference, either a specialist UTC or GPS radio transmission across the network and can synchronize all the machines networked together.

N Richard Williams is an author and a technical specialist in telecommunications and network synchronization of time helping the industry dedicated to developing products for server time. Please visit us to learn more about a time server GPS or other products of NTP server.

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Telecommuting 2.0 - One possible solution to the energy crisis

by A. Ullman

1.0 telecommuting is defined as any person working from home via the Internet. When high-speed Internet was made available to people's homes, it is generally assumed that telecommuting would take over the world. In reality, only a very small percentage of the workforce full-time Telecommute.
So, why telework has not achieved a high level of saturation? There are several major problems with telework for the masses. Many people do not have the discipline to work from home. They do not have a professional working segregated that is free from distractions. They have no access to reliable network. Also, do not have confidence that management will be a full day of work with all the distractions available at home (TV, video games, family members, etc.). All these problems combine to maintain telework to be something more than a niche option for the workplace in general. Telecommuting needs an update in order to be fully utilized by the average worker.
What is it?
For workers to be effective need an office. They must be free from distractions. They need a place to go to one place and go home so that work and home life can be separated (from spreading too far in either direction can be harmful). Teleworkers also need professional grade Internet access to an ISP that has SLA and treats its customers as business customers, not home Internet surfers. They need personal firewalls. They need a real desktop (not part of a desk, coffee table or sofa). Need a professional-grade telephone system. They need a real mailing address. They have all the things a traditional office provides.

In this current environment, where the cost of a gallon of gasoline is more than four dollars and the roads are hopelessly congested to the point of impasse, which is not necessary to spend one hour on the road to come and go from work.
The solution lies in Telecommuting 2.0. 2.0 In Telecommuting, workers driving a few blocks down the street to a remote location Office Accommodation Centre. The remote control office accommodation of the Centre for leasing office space for people from different companies in a remote office accommodation centre. " Centers are not owned by the employer. They are owned and managed commercial real estate companies across cities and suburbs. They are located near where people live, so the commute can be as short as a mile or two. It is likely that most people living within a mile or two of some industrial complex, strip mall with free space will become, or an existing office building that is close to (and probably not fully leased. All these places are candidates for lease under the Office Accommodation Centre distance model.
Remote Office Hosting Centers are the key to Telecommuting 2.0. They provide professional services and a central location.
A remote Office Accommodation Centre will provide:

Professional-grade Internet access (as well as personal firewalls and assistance with network problems.)
Professional telephone system with voice mail, long distance and other features that professionals are available with VOIP.
Professional work area, (ie, desk, chair, lighting, isolation and proximity to other workers badly needed for social contact.
Scan card-based security system (which record of arrival and departure to verify attendance and working hours). Safety records could be provided to management for the verification work hours.
Flexible lease. Companies do not want to be caught with a long-term lease if the employee turnover.
Remote Office Hosting Centers also allow companies to expand and contract, or change of personnel without the constraints of existing infrastructure and the limitations of office lease. The companies also have a larger pool of work for hire as many people are unwilling to move or make long commutes even if they are a perfect fit for a company or another.
Remote Office Hosting Centers would also be able to generate additional revenue by offering additional services, such as technology support, optional equipment, high-speed printers, video conferencing and additional costs.
At present there is a bill proposed in Congress that would require 20% of federal employees can work from home or a convenient location. A recent survey showed that 30% of office workers would be willing to accept somewhat lower pay if they would telecommute. The next presidential election could be decided in part based on which candidate is able to find a solution to the current energy crisis.
If Congress really wants to solve the energy crisis, it is necessary to get people to drive less, but still need to be able to do their job (so they can continue paying taxes.) Instead of spending hundreds of millions in subsidies for alternative fuels The government should seriously consider offering tax credits to businesses that allow workers to telecommunications, whether home or from a location near where they live. Each car is off the road means less fuel is consumed, fewer dollars transferred over the seas foreign oil companies, and more efficient travel (less traffic) for those who really need to drive to work, in order to perform a job that can not be done remotely.
Unlike hydrogen fuel cells, technology and infrastructure already exists. The only thing that must change is how the office space is rented, sold and used by American corporations. 2.0 telework is not new technology. It is simply a new way of working.

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Sunday, June 1, 2008

How not to screw your desktop or laptop

by P Hershon

Here are some personal advice on how to not screw your computer or laptop based on stupid things I've done in recent years. This article should be helpful to people who are new to the computer, people without much experience, and possibly people with mid-level computer, which if nothing else can use this as an upgrade. I have also included some other tips and suggestions to help you avoid other potential pitfalls computer. I am confident that this advice is elementary for the team with more user experience.
What to do in the computer or laptop if you do not want them Mess:
1. Do not delete anything you do not know what is going to eliminate. For example, if you delete a driver can completely screw the computer. So do not delete anything unless you know what you're deleting and know that not harm your computer by deleting. If you are unsure, do not delete.
2. Do not go to porn sites at all. This has nothing to do with morality, but many of them are viruses, spyware and adware on them.
3. Do not open any email with an attachment that you do not know who is the sender. Delete them. Also, any period not to open e-mail if you do not know who is the sender. If you see an email from a place like Ebay, Paypal and Amazon, a bank, etc. and the subject does not make sense-that is, "Your account is suspended", etc., does not open, their chances are false with some unpleasant hidden computer code or his deputy a scam email, in a lot of these suspicious e-mails can check if they are authentic messages by looking at the same venue. I never open any message from Ebay, for example, unless you are in your Ebay message box.
4. Do not download any software from a site unless you know that a site is legitimate. A lot of sites are known to contain spyware, adware, and perhaps viruses. If you are going to download the free software, I just want to do it from sites like Download.com, Tucows, Microsoft, the software company's website, etc. As an aside, I have a Ezine article in Free Software that you might find useful, entitled "10 Great Free software programs and applications (OK Some of them are cheap software!)," Ezine ID 1062401
5, If you're not sure how to install a program, ask someone with experience. If you do install a program, which initially just use the defaults and not try to install the custom, because it's likely to screw it up.
6. By eliminating a program, go to control panel where it says add or remove a program and if during the process of removing ask if you want to delete all files or of a particular file which can cause damage, do not click and / or not everything. This seems clearer to you when that happens.
7. If you see any bid as scandalous free dinner, etc., to click on one site, do not click on it. It is likely that you are receiving spam, spyware, adware or worse.
8. Keep an email address for personal mail to people you know. Keep one separately for electronic commerce.

9. Try not to put their personal email address in any way they buy online, use an email address for online purchases. I would also try to avoid the proper use of your phone number, address, full name, etc., unless you absolutely have to, or the website is a place established, like Amazon, etc. Of course, if you buy something Online you have to give a correct address and the name, but you do not have to give a correct phone number. I would also like to incorrect birthdates you go to remember. In websites or services that do not you send things by mail, I would try to avoid giving his real information out alltogether even if this means that the change after your original information was put into and verified. I mean there's nothing like an angry person sold something online, harassing you over the phone. Do not give out your Social Security Number! Repeat not give out your Social Security Number.
10. Do not open your computer and put things as extra memory, disks, etc., if you have not done before what is bound to screw things up big time.
11. Have your computer connected to a good guard you get to a computer site or retail store like Best Buy based on a recommendation by the seller or comments online. Do not buy into your local supermarket. If there is a glimmer out, I'd recommend the closure of its computer off completely, as it still could get in bad shape, even with the shield.
12. Do not let a friend or anyone else use your computer without you see what they are doing as they''re forced to do things covered here I said that you should not do!
13. Do not leave your laptop out for a long period of time if your hot as that could cause his team could overheat.
14. If you hear your computer making a strange sound or smell anything burning, turn off your computer at once. The sound is probably coming from your fan. Once had a computer at work to start recording from the fan.
15. Treat your laptop with care. If you drop, bang, etc., there is a good probability that have caused some damage.
16. I personally recommend if you are not experienced with a computer, always buy a new one that has most things that are already installed-plug and play. If you buy
a used one, there's a chance that there might be something wrong that a person with experience can fix immediately but could not. Let the buyer beware. Here only
a quick example. I bought a laptop computer used online to someone years ago and said everything that was established how the laptop was when I was in the store. Well, I
uncovered huge amounts of spyware, adware, viruses, etc., but there I was experienced enough to know how to remove them with the help of software. If you're not and try to do so, asking their possibly worse problems.
17. Do not drink any soda, water, etc. near your computer and try not to eat near the keyboard, either.
18. If a key gets stuck on the keyboard, not pull it out, especially on a laptop, a lot of times, a key element if you leave a laptop and can not be put back in place if it gets fixed , Is replacing all the keys and charge accordingly. Fastidio.
19, I would have an extended warranty on a computer if a disaster because at least it will not be totally annihilated. Think of it as insurance.
20. Make sure you understand what you're doing with the new software before you start using.
These are just some basic things and I am sure I have not come close to touching the surface, but things are pretty easy once you use the computer regularly.

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Thursday, May 29, 2008

Implementing New Technology

by John Mehrmann

There are amusing and horrific stories of the trials and tribulations associated with the transfer of technology, and the implementation of new systems and architecture. There are lessons that we can learn from those who have blazed the trails before us, and those who have been burned by the blaze. Get your fingers ready to count the five fundamental considerations for implementing new technology.
What we learned from Oracle
"The original plan was to transition the existing IT infrastructure to Oracle over a period of three months. It is three years later, and we think that we are almost done with our Oracle implementation." Does this sound familiar? if so, you have plenty of good company. Oracle is a powerful engine. It is high octane, scalable, and has flexible object oriented architecture to allow continuous growth and integration. So, what went wrong?
Quite often, in the eager anticipation to install the latest and greatest engine, the other parts of the car were forgotten or overlooked. Sure you have a powerful new engine, but your steering wheel is gone. It was replaced by a series of point and click drop down boxes to precisely instruct the car to turn at a specific angle. Do you want to make a 30 degree turn, a forty degree turn, or a 90 degree turn, right or left? Simply choose the appropriate item from the drop down menu and you will have the exact turn that you desire. Gone is that old fashioned and inaccurate steering wheel that required manual intervention and guidance to gradually adjust the turn in process, and installed is the precision turning device that is managed by your mouse. The problem is, nobody mentioned that the new steering mechanism was sold separately, and would take another six months to program. Nobody mentioned that everyone responsible for driving the car would have to learn a new steering methodology, lose the ability to make manual adjustments along the way, and need to learn to be more predictive and accurate in the selection of the accurate turn. Adjustments can be made along the way to correct a turn, with more point and click menu selections, if necessary. The extra time, design and development costs, and employee training are sold separately. You see, Oracles sells that powerful engine, not the steering wheel.
Does that sound funny or familiar? If it sounds familiar, then the humor is bitter-sweet. If it sounds ridiculous, then you have not experienced it yet. The steering wheel is only one example. Once the steering mechanism is programmed and put into place, then the other discoveries begin. That powerful engine comes with a speedometer and tachometer, so you can see your performance and the RPM of the engine. Isn't is exciting to see that you have only partially tapped into the incredible power of this magnificent Oracle engine? Unfortunately, if you rely on other dashboard devices like signals for turns, air conditioning, or a radio, then you have to build these things yourself. After all, the engineers of the engine realize that you turn on different roads than everyone else, you have personal preferences for your climate controls, and you have personal preferences for terrestrial or Sirius satellite radio stations. Therefore, you need to build the point and click objects, menus, and radio buttons to accommodate your personal preferences, and all the possible variations thereof. Someone forgot to mention that all of these functions and amenities need to be custom designed for each driver.
Once the common dashboard and control devices are designed, developed, and implemented, then the next wave of discovery begins. The old buttons, knobs, and dials are gone. Everything has been replaced with the convenient control of a single device, your mouse. That seemed like a wonderful convenience when it was first described to you. All of the controls are at two fingers on one hand. Once you are past the pain of installing all of the other controls at additional cost, it occurs to you that it might be a little complicated to switch between steering the car, sending a command to roll up the windows, turning on the air conditioner, selecting a radio station, and signaling your turn, all at the same time with one device. All of these things require a different set of menus, so you need to choose your work stream very carefully. Otherwise, you may run into the back of a truck while trying to turn off the heater, and turn on Howard Stern. Just then, it begins to rain, and you realize that the windshield wipers have not been coded yet.

Dear Larry Ellison, please forgive me if my sense of irony has inadvertently presented what could be perceived as an unflattering commentary. It is merely intended to make a point about proper planning for transition of technology. After all, you do build a beautiful engine.
So, what should we do?
1) Be Aggressive
It is appropriate to be aggressive when implementing new technology that provides a competitive edge. The competitive edge may be related to overall system performance that empowers employees to become more productive. A competitive edge may be a utility that empowers clients and customers to become more self-sufficient, like installing the ATM machine outside the bank for customer self-sufficient convenience. The competitive advantage may integrate multiple functions, partners, or streams of data that allow for more intelligent decisions or effective business. If the implementation, integration, or transfer to new technology is going to have a substantial and measured competitive advantage, then be aggressive about the pursuit of technology.
2) Be Cautious
If the transfer of technology touches upon the core competency or revenue of your business, then be cautious about making any significant changes. This does not mean that you avoid improving technology. It merely implies that it is appropriate to be more cautious in studying the ramifications and ancillary applications which may be impacted by even a subtle change to the code. There are horror stories from companies that implemented seemingly innocuous changes to billing, and then failed to produce invoices or statements for the clients. During this period of the transfer of technology, revenue was suddenly reduced. The result created financial hardship for the billing company, and for the disgruntled customers who suddenly received several months worth of accumulated billing once the invoicing system issues were resolved. Not only was this an impact on cash flow during the interruption in billing, but it impacted the relationship with the clients as well. Be aggressive about competitive opportunities to grow your profit and performance, but be cautious when it comes to implementing changes that may impact your core business offerings, clients, or billing.
3) Be Quick
Be quick to implement minor changes, and carefully monitor the impact. When it come to performance enhancement, internal suggestions for simplifying routines, or improving the customer experience, do not delay. Design the small changes, test the changes thoroughly, and create a schedule to consistently roll out enhancements. Quite often, the little enhancements have the biggest impact to business performance.
4) Be Slow
When it comes to major changes in the architecture or systems that sustain your business, be slow in implementing change. Frequently, the core architecture and functions of the business are the most efficient and streamlined. The processes that get the most use are the ones that get the most attention, and are often the most highly evolved. Unfortunately, these are also the processes that typically are selected for the first priority when it comes to implementing a transfer in technology. On the contrary, avoid the allure of focusing on familiar ground, and preserve the primary processes until the transition has been tested on some of the more complex, and less often utilized, utilities. By focusing development on the most complex and least used functions, there is tremendous knowledge to be gained by the experience, and the least amount of impact to the business. There are too many horror stories of companies that eagerly transferred the main processes, and then spent months or years working out the bugs that could have been identified by developing a much less needed or impactful part of the process.
5) Be Safe
There is no better time to address the vast array of potential security needs than during the design, development, and implementation of new technology. What personal data to you manage, process, forward, or store? This is not limited to credit card transactions or bank account numbers for wire transfers. Somewhere in the enormous archives of data, you are probably holding precious private information on every one of your own employees. Employee records contain social security numbers, bank accounts for direct deposit, names and addresses, and possibly even reference to medical coverage. Quite often we think about the pipeline to our customers, and forget about the goldmine of private information inside our own facilities. Don't we owe the same protection to our own employees?
Privacy data can include medical records, financial records, and personal information. Driver's license numbers, credit card numbers, or even matching email address with telephone numbers, are all potential risk to privacy. The threat is not limited to how people access the information from the outside, or the number of firewalls that you put into place. The threat is also from the inside, and what kind of information is available to employees and associates. How easy it is to look up client records and download the information to a thumb drive? How easy is it to copy the entire company database of customer information, account information, or intellectual property? What would it be worth to a disgruntled employee to take valuable client information to a competitor?
There is no better time than the present to have a security expert evaluate the potential breaches of privacy in your organization. If you have customers, credits cards, customer accounts, client information, intellectual property, financial information, medical information, or employee information stored electronically, accessible on a network, or printed in files, then it is time to consider security.
If you are in the midst of preparing for a technology transformation, design, development, integration, or implementation, then it is the perfect time to review all of the related documents with a security and privacy expert. If you are organizing all of this information, then why not take advantage of your efforts to protect your customers, your employees, and your business? Executives and management are increasingly being held responsible for ignoring or overlooking the potential security breaches in their respective organizations, both from protecting customers from external threats, and for controlling the actions of disgruntled employees. Mitigate risk to the company, and the executives of the company, by taking appropriate and reasonable precautions for expert analysis, controls, and privacy.
Words of Wisdom
"Technology is dominated by two types of people: those who understand what they do not manage, and those who manage what they do not understand."

- Putt's Law
"For a list of all the ways technology has failed to improve the quality of life, please press three."

- Alice Kahn
"There is an evil tendency underlying all our technology - the tendency to do what is reasonable even when it isn't any good."

- Robert Pirsig
"Humanity is acquiring all the right technology for all the wrong reasons."

- R. Buckminster Fuller

John Mehrmann is author of The Trusted Advocate: Accelerate Success with Authenticity and Integrity, the fundamental guide to achieving extraordinary sales and sustaining loyal customers. This revolutionary book applies peak management techniques and leadership skills, with common sense and practical applications to grow business, sustain loyal customers, and use personal talents for personal success.

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Tuesday, May 27, 2008

The Benefits Of MS Exchange Server 2007

by Nick Pegley

For today's businesses, e-mail is perhaps the most important communication method in use. An increased reliance on e-mail has drastically increased the volume of messages sent, even increasing the rate of business itself. Today's employee seeks efficient and remote access to online calendars, contacts, and email, regardless of what type of device they're using. Exchange Server 2007 from Microsoft was designed specifically to address the needs of a messaging system. Exchange Server's new capabilities provide improved protection, access and efficiency.
The IT professional's task is that of providing a messaging system that satisfies needs while remaining balanced in security and cost. As e-mail volume increases, security requirements become more challenging. IT staff must counter a multitude of security threats, including spam, viruses, noncompliance risks, and email security. Although security is a high-ranking priority, staff must always work within the constraints of time, money and resources. This causes IT to look for a system that will satisfy the requirements of the business, yet is cost-effectively managed and deployed.
Exchange Server 2007 provides protection, built-in. This reduces spam and viruses while enabling private communications and helping attain compliance.
* Smooth flow of communications with enterprise-class availability and reliability

* Protects data and users from destructive viruses and spam

* Secure communications are provided automatically within the company
With Anywhere access, employees can get to their e-mail, calendar, voice mail and contacts from a variety of clients and devices. Anywhere access requires an Internet connection; Outlook Voice Access requires a telephone connection.
* Improved collaboration, making it easier to find and share documents, schedules and data

* Employees are provided with a single inbox for e-mail, voice and fax messages

* Overall productivity is improved with a staff able to respond from work, home, or the road

* Quick and seamless delivery of an Outlook-style experience from a variety of devices
Better efficiency is made possible by networking features and optimization hardware, helping administration staff.
* Exchange Server data easily integrated with Exchange Web Services

* Efficient deployment with automatic client connections, roles-based architecture, and better diagnostics and monitoring

* Delivery of powerful x64 bandwidth optimization and computing

* Improved ability for administrators to find and fix problems, as well as task automation
Exchange Server offers benefits and capabilities to a broad range of clients. In addition, it supports the Outlook experience. MS Exchange Server 2007 can be integrated with Windows SharePoint Services and other Office applications and third-party systems and devices.

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Sunday, May 25, 2008

Video Cards

by Ganesh Asokan

A video card is an upgrading hardware device (expansion card) which can be plugged into the computers motherboard. It is also known as the graphic card, display adapter, graphic adapter card and also has other terms. It is mainly used for gaming. It also has other uses like 3D rendering and editing and etc which are rarely being reviewed.
Most people think that a video card slows down the Pc by using the systems Ram. It is not true. Video cards use their own memory and there are some protocols that allow video cards to access a part of the systems memory. But the recent video cards have their own inbuilt memory and do not make use of the systems memory.
If you are a Pc gamer and you want to feel the reality in graphics, the best thing to do is to upgrade you PCs Graphic card. Gaming experiences completely depends on a video card. The heavier will be the load and effect on game playing when the graphic settings get higher.

People play modern games with old video cards, but they experience slow game play and low video quality. We know that, a video card is installed to the slot on the motherboard.
Motherboards have 1 to 3 expansion slots which are different from each other. They differ in bandwidth, voltage, and other features.
It's very important to know the slots you have in your systems motherboard and buy an appropriate video card. A video card designed for one slot type cannot be installed into another slot. So please make sure you consider all these when buying a video card.

Consolidated CD-ROM, Inc. It is a family owned and operated business where customer service and satisfaction has always been our number one priority. Consolidated CD-ROM Inc is a Pennsylvania State Corporation since 1992: http://www.consldcdrom.com/index1.html?target=d59.html.

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Friday, May 23, 2008

How PCI DSS Security Standards Protect Your Credit Card Transactions

by Amy Nutt

Payment Card Industry Data Security Standard (PCI DSS) is a security feature that was developed by the major credit card companies to help businesses that process credit cards prevent credit card fraud through various security vulnerabilities that would exist otherwise. All companies that store, transmit, or process credit cards must be PCI DSS compliant in order to process these transactions. If they are not, then they can lose their ability to accept credit cards.
If you are not sure how these actions can protect your credit card transactions, below are the security standards that must be employed in order to make sure these transactions are secure:
• Not using password defaults or other security measures that are provided by the credit card machine vendor. They are usually all the same and make the system vulnerable.
• Install and maintain a firewall to keep intruders out.
• If cardholder data must be transmitted over public networks that are open, the data must be encrypted.
• Business need-to-know must be used to restrict access to cardholder data.
• Physical access should be restricted to cardholder data.

• Each person that has computer access, which means they may be able to access credit card numbers, should be assigned a unique username and password. This is so any accessed data can be traced back to the person who accessed it.
• All access to network resources should be monitored, as well as access to cardholder data.
• The system should be tested on a regular basis. This means all processes should be tested as well.
• Maintain an information security policy. Enforce compliance with this policy and discipline if it is deviated in any way.
There are also certain pieces of information on a person's credit card that can and cannot be stored. The pieces of information that can be stored are the card number, the cardholder's name, the expiration date, and the service code. Pieces of information that cannot be stored are the magnetic strip, the PIN number, and the CVV code on the back of the card. PCI DSS standards require that information that is permitted to be stored is stored in a secure manner. Auditors will check for compliance in all of these areas. If it is found that the business is in violation in any way, the business could risk losing their privileges of taking credit cards or could face a heavy fine.
A worse scenario is that if a business is found to be in violation of PCI DSS requirements when cardholder information is stolen. This holds the business liable for ensuring that customer information is not compromised and to take measures that are appropriate in case that information is.
Even if you are a hosting provider, you have responsibility such as making sure the connection is secure when accepting credit cards. PCI DSS requirements do not apply to just in-store environments. It is true that it is impossible to verify that the person using the card is indeed that person, but what is possible is to make sure that information is protected so that outside parties do not access it. The internet is crawling with hackers and those looking for insecure connections. Abiding by PCI DSS regulations makes it less likely that such a breach will occur.
So now you can see how PCI DSS protects your credit card transactions. It is very likely that information is stolen when PCI DSS is followed closely. As long is it is followed, you have no security breaches to worry about and no bad audits that could result in trouble for your business.

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Wednesday, May 21, 2008

Safely Clean The Windows Registry

by Scott Drinkard

From the perspective of a computer repair tech, maintaining the Windows registry is no big deal. Because of my years of experience, I'm perfectly comfortable opening the reg edit utility and making changes to improve the stability and overall performance of a PC. Sometimes I forget though, just how dicey it can be to make sweeping changes to the Windows Registry and as a rule, this type of maintenance should only be performed by an experienced computer professional. That being said, there are always a few adventurous types who like to tinker with their computer, and to those people I say "Atta Boy!" There is really nothing wrong with trying to improve your PC by making changes to the registry as long as you know beforehand that it can be risky and are willing to accept that risk. After all, the benefits gained from optimizing the registry can be significant if done properly (and carefully!)
For those of you who aren't familiar, the Windows registry is a special folder in the operating system that contains pretty much all of the information that Windows needs to run properly. All of this information is stored in a hierarchy of keys and values pertaining to different functions of Windows and all programs and settings on the computer. As a result, changing or deleting a registry key without knowing what you are doing can have very undesirable results up to and including making your computer unbootable. So for the sake of safety, I must give this disclaimer: WARNING! Making changes to the Windows registry can result in corruption of your operating system. NEVER, EVER make changes to the registry without making a registry backup first! Seriously, I really mean it! You can seriously screw up your PC if you make a mistake! Everyone got it?...OK then, let's move on.

One problem with windows is that it does a lousy job of housecleaning. What I mean by that statement is this: when you install a program on a windows system, entries pertaining to that program are entered into the registry. For some odd reason though, when you remove said program from your PC, all of the associated registry entries are not always completely removed. Go figure!.. Anyway, over time these invalid and orphaned registry entries pile up. Most just sit there collecting dust and aren't really a problem. Some though, can cause your computer to behave erratically and/or degrade overall system performance. A second problem is that these registry entries can be very cryptic and are scattered throughout the registry, so unless you happen to be a software engineer and are very familiar with the inner workings of the Windows operating system the rogue registry entries are impossible to track down and eliminate.
For registry cleanup you need a registry cleaning tool. I've never been a fan of these applications for the simple reason that they often can do more harm than good, so the trade-off of benefit to risk just isn't worth it. There is only one program however, that I use myself that I do recommend for this type of operation. It's called Registry First Aid and it's the ONLY registry cleaning software that I endorse. The reason that I recommend this software is that it takes a very cautious approach to cleaning the registry but at the same time it's very thorough. It is configured by default to automatically make a full registry backup before it makes any changes (That's a REALLY GOOD feature). It also groups the identified registry errors by "safety level" so that you can easily make wholesale changes to the "safe" items and take a more cautious approach to the entries that could damage windows if not handled properly. All in all, it's a very safe and effective tool for optimizing your PC as long as it's used as directed. I highly recommend it! If you would like to try it for yourself, you can visit the downloads section of my website and grab a free trial copy.
Anyway, the point that I'm trying to get across is this: You can make significant improvements in your computers performance by maintaining and optimizing the system registry, but you have to be very careful. Just remember these points. (1) Manually editing the Windows registry can be very dangerous if you don't know what you're doing. (2) NEVER make changes to the registry without first making a registry backup. (3) to keep your PC running smoothly, get a (good) registry cleaning utility like Registry First Aid. If you will remember these simple things, you'll keep your computer running like new.

Scott Drinkard (The Computer Guy) is a freelance computer service tech living and working in Odessa, Texas. The owner of Odessa based "The Computer Guy" has been helping the good people of West Texas with their computer problems for about 10 years. Please visit http://www.odessacomputerguy.com/articles.html for more information. T download a free trial copy of Registry First Aid, Please visit http://www.odessacomputerguy.com/downloads.html.

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Tuesday, May 20, 2008

How My iPod Calms My Obsessional Personalty

by Sarah Maple

I am bipolar, and as such, suffer from certain obsessional behaviour problems. These range from checking my emails twenty times an hour, to how I organise my music.
The way I listen to music has changed with the times, and my methods of classification have also changed. Where once all my music was filed alphabetically on records, tapes and cds, it is now all in folders on my iPod. I can listen to, and amass, seemingly unlimited amounts of music. Equally, there seem to be endless options as to how I can arrange said music.
However, on examination, my methods have remained similar. I used to make mixed tapes - spend hours hunting for, and selecting perfect tracks. The inspiration generally came from having listened to enough new good music that I was no longer happy with the old tapes.
Making a tape was always a precise and time consuming operation. Working out what would fit into ninety minutes, making sure there were no gaps, no jerky starts, rewinding and checking. And I had endless rules. For example, I wouldn't put two tracks by the same artist on the same side, the best tracks had to be balanced out through both sides, and it was not acceptable to have a track run out on the end of the side.

Now I am part of the iPod generation, I have playlists. Gone are the days of precision and commitment. On an iPod, any decision can be reversed, tracks can be added pretty much instantaneously, and the only time limit is the memory of the iPod (which is no comparison with a ninety minute tape).
But, I still have my rules. I still make a new playlist when I have a glut of new music. The only difference now is I have one overall playlist which everything gets added to. I don't delete my playlists. The same way I have kept all my mixed tapes, my playlists are soundtracks to certain periods of my life. I also don't delete tracks from my lists. Once it has been committed, it stays. In the same way with every mixed tape I made, there was one annoying track which I always wished I'd never added, the same is true of my playlists. Whilst there is no logic to not deleting the offending track on my iPod, I never do.
However, because of the speed of making lists, there are now so many possibilities. I can make a list for every mood, for every eventuality. Sometimes, I feel overwhelmed by the range of options and sit in front of the computer, motionless, lost in thought over the next best way to tackle the classification of my music.
Yet, despite this, and despite the wistful nostalgia for the tape deck collecting dust in my Grandma's cellar, I wouldn't want to go back. My obsession addled brain loves the flexibility and speed. And, as with so much technology, I couldn't imagine living without it.

Sarah Maple used dealtime.co.uk and uk.shopping.com to find the best prices for an iPod or mp3 player online.

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Saturday, May 17, 2008

Moore's Law - Is It The Kiss Of Death For Enterprise Technology?

by Sandra Noble

I was perusing BPM Strategies magazine and came across the term "applistructure ". Applistructure has to do with the convention of combining enterprise infrastructure and enterprise business applications. Service-oriented architecture (SOA) refers to a web centric / web focused approach to technology. According to the "SOA and Application Infrastructure" article by Mike Rosen, this applistructure trend was hot a couple of years ago. Can you relax? Or, as Mr. Rosen suggests, can you take comfort in knowing that solving management and business process issues are more critical to enterprise success than the actual technology?
I attended the Atlanta AFCEA (Armed Forces Communications and Electronics Association) February 2008 meeting. The speaker, Mr. Joe Capps talked about the subject of moving to enterprise level systems and procurement processes. Instead of haphazardly developing technology in an "after the fact" manner, he advocated a more proactive approach - as in developing a strategy to move toward enterprise infrastructure, enterprise business applications and enterprise technology in general.
Additionally, a key imperative of the Department of Defense (DoD) is to change and accelerate the requirement to solution process. What's known as Moore's Law (based on Gordon Moore's predictions about semiconductors), says that technology is rapidly changing. Probably about every 18 months. Where there is a need for the latest technology, Moore's Law has financial, logistical and feasibility implications. The government and the DoD are known for red tape and cumbersome processes. But our country's ability to respond to immediate threats requires current, accurate information delivered to those needing it in a timely fashion. He suggested the criticality of providing our war fighters with decision making data on how to even respond to five guys running down a street in Iraq. Wow!

Moore's Law has implications in the private sector as well. Large scale technology projects often take 18 months or more to implement. That time is in addition to the time required to budget for, select and procure the software, hardware, and implementation partners. While ERP (Enterprise Resource Planning), CRM (Customer Relationship Management), MES (Manufacturing Execution Systems) and the like, may not be obsolete, there are sure to be upgrades, patches (corrections and fixes to software problems) and new feature by the time the system is finally rolled out.
So, what can be done? Knowledgeable consultants with system expertise can help companies and public sector entities develop a strategy and select the right software in the first place. Then, the right implementation partners can accelerate and provide Independent Verification and Validations (IV&V), project management and governance throughout the implementation process. If none of these things were in place or addressed during the course of the technology project, then you'll probably need the cure for the "Post Implementation Distress" that is sure to occur.
You're spending millions of dollars for enterprise initiatives. Wouldn't it be worth spending a small percentage on ensuring that you get what you paid for? Perhaps you need a technical advocate to help you navigate through the planning and implementation process.

About Us:
Sandra Noble - MBA, CPIM, Six Sigma, DCFS, CDP, is president / CEO of Noble & Associates Consulting Inc, which offers cost effective, strategic, enterprise e-Business solutions delivered by experienced professionals with industry, business and application knowledge and expertise. We specialize in IT strategy, needs assessments, software evaluation & selection and implementation of SAP, Oracle, ERP and other enterprise-wide software solutions. And we're the cure for Post Implementation Distress. "Reducing The STRESS of Software Implementations Worldwide".
For a *FREE* report"12 Sins of ERP Implementations",click http://www.CurePostImplementationDistress.com

Noble Finances, a division of Noble & Associates Consulting, provides accounts receivable financing, equipment & software leasing, cash advances on credit card sales and pre-settlement lawsuit funding and law firm portfolio loans.
If your bank says NO, then YES, you need to explore other alternatives.For more information, visit http://www.GetCashFromReceivables.com

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Friday, May 16, 2008

P2E (Plant to Enterprise) Using JMS

by Jojo Jose

Overview
Now a day, every manufacturing enterprise has at least one enterprise application system (ERP) to run the financials, supply chain and warehouses which will in turn manage all the business resources. And there should be a manufacturing execution system (MES) that help manage and control production. In order to take the decision at appropriate time it is most important to connect the ERP with MES in almost real time.
With the advent of standards like JMS, developers can now connect numerous technologies. With the help of JMS distributed-system design and integration are easier and their easiness on data integrity and distribution are having a high contribution to system success.
P2E Framework Using JMS
The enterprise resource planning and supply chain systems and the people that use them are hungry for the information generated by manufacturing operations. The JMS enterprise messaging provides a reliable, flexible service for the asynchronous exchange of critical business data and events throughout an enterprise. Similarly, the production systems depend on the demand, material, product design, and scheduling data that flow from business systems. Many manufacturers still rely on manual, paper-based techniques, or inadequate, fragile point-to-point systems integration to support the processes and applications that comprise communications between these mission critical systems.

Of course their will be delay between the data exchange between the systems but it will be still less than the traditional batch data flush using Data Transfer Services. When the manufacturing plants are highly outsourced and when the parts are prepared in different plants it is very important to know the actual status of each component manufacturing process to the demanding customer (Here the customer could be a department or an outside customer). Batch process running on every evening or every week ends not only delays the decision making but also gives lacks of visibility.
Using JMS the systems can still continue working even if the other system is off or when there is a network issue.
When the other system awake the data can be populated or supplied without any loss of information. Thus it gives more flexibility for maintenance too.
Most of the equipments are very fast and provides huge amount of data within minutes and most of the enterprise systems are simply aren't designed to absorb most production data in its original form. It needs to be put into the context of orders, inventory levels, or product status. There should be a middle ware which will filter and update the ERP. The highly decoupled JMS architecture is the best suite for all these kind of applications.
Many companies use Manufacturing Execution systems with service-oriented-architecture (SOA) to accomplish the real time data capture. But most of the time the communication standards are not disclosed to the programmer level to implement additional integrations. In this scenario the JMS architecture plays a vital role.
Conclusion
In order to engage in the strategic initiatives such as Lean, Six Sigma, Real-time, or Continuous Improvement to drive manufacturing excellence, the real time manufacturing information capturing is to be done at the shop operations level. Thus it is easy to monitor and metric efforts, then adjust tactics to ensure that financial outcomes meet expectations. An enterprise-wide P2E strategy can be implemented using the JMS technology to synchronize the people and processes that comprise your business.

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Tuesday, May 13, 2008

Computers - Fad or Flaw?

by Joe Blaine

Everyone at one point or another has felt like throwing their computer out of a window. Well maybe you should! They seem to get slower right after you take them out of the box.
Computers seemed designed to crash, burn, and give you more headaches that you need just so they can sell another. According to Moore's Law at Wikipedia, "the number of transistors that can be inexpensively placed on an integrated circuit is increasing exponentially, doubling approximately every two years."
Who can afford to buy a new computer every two years? That seems a bit unreasonable but there are steps you can take to keep your computer running fresh. A major reason computers become slow is because of hidden programs and files that use up memory and drag the performance down. It helps to remove these programs from the start-up menu as well as uninstalling any unnecessary programs. However, even this has a limited capability for improving performance. It's best to use a program to clean out the registry to have the computer run smoothly. When interviewing a member of the Geek squad he said, "You can't get much better than www.easyxprepair.com."

It seems as though this does bring a small glimmer of light into the void of computer madness.
Even on outdated computers this had a significant increase in the computers performance. So just when you're thinking of throwing away your old computer take a second to look at other options, it could save you thousands.

For more information about this topic please visit http://www.easyxprepair.com

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Thursday, May 8, 2008

The Art of Imitation

by Tricia Morente

In a nutshell, an Emulator imitates or copies; it is something that impersonates something else. Technically speaking, it is a simulation of the functions of one system using a different system, so that the second system appears to behave like the first system. An important by-product of modern technology, an emulator gives users the capacity to obtain better control of the product/service it specifically serves.
The impact of emulators is most felt in the world of computers. As each computer consists of both hardware and software, the strong dependency between these two entities introduces a risk. If one of these fails, it will influence the computer's operation and, consequently, its capabilities. As each hardware device will eventually break down, software accessibility is at stake. Emulation offers a solution to this problem.
As emulation imitates a certain computer platform/program on another platform/program, it makes it possible for users to view documents and run programs on a computer not designed to do so. In itself a program, an emulator creates an extra layer between an existing computer platform (host) and the platform to be reproduced (target).
Versatility: The many faces of the emulator
Whereas before emulation was perceived as limited only to computer systems, it has long since evolved to accommodate the needs of other areas like those of technology, the mobile web, business, games, aviation, and even art.
Emulators are especially visible now in the gaming industry. Gaming giants like Sony, Microsoft Xbox, Nintendo and Sega, among others, often design their video game console software on especially accurate console emulators before trying it on real hardware. This enables them to test their software before finally manufacturing the final hardware in large quantities. In gaming, most of the time the company producing the simulator is also the one providing the hardware, which consequently enhances quality control.

Similarly, emulation is also prevalent in aviation and aeronautics. Aerospace manufacturers use engineering flight simulators in the development and testing of flight hardware. Emulation techniques are employed to make flight hardware work. Artificially-generated or real signals such as electrical, RF and sonar are emulated depending on the kind of equipment being tested. Engineering flight simulators are also used on the development and testing of flight software and the aircraft system itself.
Flight simulators are also extensively used by the aviation industry for design and development and for the training of pilots and other flight deck crew in both civil and military aircrafts. This flight simulator tries to copy, or simulate, the experience of flying an aircraft. It is as realistic as possible. Different types of flight simulators exist. They range from video games up to full-size cockpit replicas mounted on electromechanical actuators.
Aerospace companies also make use of space flight simulators to replicate the experience of space flight in a spacecraft as closely and as realistically as possible. These range from video games up to cockpit replicas controlled by state of the art computer technology or elaborate water tanks for the simulation of weightlessness. Space flight simulators are used almost solely by the aerospace industry and the military for cosmonaut/astronaut training, disaster simulation and spacecraft development.
Emulators are also used in hardware architecture. Many printers, for example, are designed to emulate Hewlett-Packard Laser Jet printers because a lot of software is written for HP printers. By emulating an HP printer, a printer can work with any software written for a real HP printer. It tricks the running software into believing that this device is really some other device.
Emulation is also a preservation strategy heavily used in New Media Art as it primarily uses digital formats. Some artists who specialize in resurrecting obsolete technologies in their artwork recognize the importance of a decentralized process for the preservation of digital culture. The goal of emulation in New Media Art is to preserve a digital medium so it may be saved indefinitely and reproduced without error. This minimizes the reliance of artists on hardware, which ages and becomes obsolete.
Indeed, the important role of the emulator has never been as highlighted as it is now. It has even gone so far as to infiltrate the rising mobile web. In fact, most mobile site builders make use of the emulator to enable users to view, in real time, their mobile web sites as if viewing it from a mobile phone. Mobilemo, a mobile site builder, created an emulator that serves as an extension of the mobile phone itself. It lets the owner view the changes he made in customizing his mobile site. The emulator of such site also has browsing capabilities that also enables users to view the mobile sites of other members through the computer.

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Wednesday, May 7, 2008

Digital Signage - The Growth and Reach of Narrowcasting Technologies

by Dennis Goddard

We've all seen the proliferation of digital signage popping up in retail outlets, department stores and gas stations everywhere. You know, the ubiquitous screens that range in size anywhere from the small display screen right above the gas pump to the big, LCD monitors that overhang the aisles in department stores and big retailers, like Wal-Mart or Sears. Ever increasingly, or so it seems, we see these digital signs running messages outside store doors, in parking lots, office lobbies and train stations, between product shelves inside stores and mostly, perhaps most most effectively, near checkout counters in both small and large retailers.
It seems that digital signage is popping up wherever we, as consumers, have time on our hands while we are busy doing other things - or, even better, not doing other things. Whether it is a few minutes while we are occupied (but not preoccupied) filling our gas tank, or for many minutes - that can seem to stretch into hours - while we patiently (or impatiently) wait our turn in a medical office, nowadays it is typical that we can just turn our heads and tune into a stream of news, sports scores, financial tips and human interest pieces that entertain us, while what draws our eye is interspersed with focused advertising that delivers an advertiser's message. Welcome to the world of digital narrowcasting!
Unlike a human salesperson, digital signage is intended to be non-invasive of our privacy, or at least less invasive and more welcome than traditional sales pitches. A salesperson is not, whether welcome or unwelcome, right in our personal space demanding our attention. Rather, we are already in a space and location where an advertiser can give us the opportunity to pay attention to his or her message - or not. In turn, we are given a mixture of entertainment content and commercial messaging, and we can choose whether to be entertained by the content and listen to the advertiser's message. Alternatively, we can choose to completely ignore the "salesperson", the product and the pitch altogether.
With innovative, entertaining content planning and well thought-out positioning, most customers will actually pay attention to strategically placed digital displays, and will be receptive to the narrowcast content and messages that are delivered. The truth is that there are times and situations where the consumer craves distraction. We've heard of instances where digital signage in dentists' offices has been displayed to the patient while he is in the dental chair itself, and not in the waiting room.

Advertisers can utilize this new media to deliver older, tried-but true ad strategies. (Think of Coca-Cola's now century-old formula of "branding - putting the Coke brand name in front of the public eye irrespective of whether or not the customer is going to actually buy a soda at that time. Coca-Cola isn't particularly interested if the person pumping gas and seeing the Coke brand at the pump goes in and buys a Coke. It knows that later, at a restaurant perhaps, the person who pumped the gas will order a Diet Coke, and if they don't sell Coke's brand the waitress will be forced to ask if a Diet Pepsi will do.) But the true worth of digital signage is in the adaptability of its message to the place, situation and time where the programming is displayed. Take the checkout counter, for instance. A customer lining up at the payment counter has idle time, and a proper combination of useful information and product advertisements will focus their attention and create receptivity to the products and services being offered right at the checkout. (It is the same reasoning that prompts retailers to place chewing gum and candy bars right at a child's eye-level, so that he or she will beseech an already impatient parent to purchase gum or a Mars bar just to get through the checkout line without a hassle.) Studies confirm that the checkout counter is an area where customers are most receptive and most likely to buy impulsively. Parents are on to this, yet digital narrowcasting aimed at simplifying their lives and their shopping experience are nonetheless effective in influencing even this group to make the spontaneous, unanticipated purchases that drive up revenue.
Unlike static posters and standup displays, digital advertising software gives the customer a dynamic experience. An almost endless number of messages can be played on it. And unlike human salespeople, it never gets exhausted and does not commit the faux pas that a tired seller who has spent a tiring day with demanding customers might. Each sales pitch is delivered with as much enthusiasm as the first time. Therefore, the quality of its performance, which can be quantified and optimized, is uniform come hell, high water or demanding customers. By directing customers to what it is they are likely looking for in a particular area of a store, the capabilities of the most up-to-date digital advertising software can, in fact, soothe demanding customers by making their shopping experience less challenging,
Unlike printed materials that show the same ads for all areas of a store, digital signage is completely programmable and can follow different sequences or run completely new presentations in every section or strategic area within a location. It is even time-sensitive and can pitch different products according to time of day and the shelf-lives of products that are themselves time-sensitive. Should the competition comes up with new strategies, digital signage can quickly be reformatted to immediately respond to a competitor's marketing strategies.
Last but not the least, the presence of digital signage and narrowcasting technoiogies in-store conveys an image of a company that is modern and dynamic. In a time where change has never been so pronounced, a company that imparts an image of being at the leading edge of technology, and even pushing the envelope, sends a subtle but important message that it has the latest and best goods or services that consumers are looking for.

For more information on digital signage, narrowcasting and digital advertising software, please visit our website at http://www.ek3.com or call 1-866-353-8324 to speak to us at EK3 Technologies Inc. about business solutions and services that capture your audience and deliver your message.

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Tuesday, May 6, 2008

How to Run a Network Time Server in Windows XP

by Richard N Williams

Time synchronisation in modern computer networks is essential. It not only provides the only frame of reference between all devices, it is critical in everything from securing, planning and debugging a network to providing a time stamp for applications such as data acquisition or email.
Microsoft Windows XP has a time synchronisation utility built into the operating system called Windows Time (w32time.exe) which can be configured to operate as a network time server. It can be configured to both synchronise a network using the internal clock or an external time source.
For many applications, an internal clock can be quite adequate, although, on a network, problems can arise with applications such as sharing network files or in some environments even fraud, so it is vital for security reasons to use an accurate timing source for your network.
NTP (Network Time Protocol) is a protocol already installed on Windows XP and is used by Windows Time to keep machines synchronised to the single time source. There are several timing sources available on the Internet but Microsoft and others strongly recommend that you configure a time server with a hardware source rather than from the Internet where there is no authentication.
Specialist NTP servers are available that can receive a reliable time source via the GPS signal or specialist radio transmissions that get their time from atomic clocks.
If you wish to configure Windows XP to operate as a time server then first thing is to locate the Windows Time subkey. To do this:
Run Regedit (Click start/run/then type REGEDIT/and click enter.
Note: editing your system registry can cause problems with your system. It is advisable to back up your system before editing the registry.
Now locate the following subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\parameters\ Right click the right-hand side and click Modify. In the Edit Value box, under Value Data, type NTP and then click OK.

Now go to the Config folder and right-click AnnounceFlags, Modify and in the Edit DWORD Value box, under Value Data, type 5, and then click OK.
Locate this subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpClient\
Right-click in the right-side window and Modify. Edit the DWORD value box and type the number of seconds you want for each poll under Value data, i.e.: 900 will equal 15 minutes. The poll field represents the polling interval between NTP poll packets.
To enable the NTP server locate the subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpServer\ Right click enabled (in the right-hand window) then Modify. Edit the DWORD Value and type 1. Right-click NtpServer, then Modify and in the Edit DWORD Value under Value Data type Peers, then click OK.
Locate: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\config
In the right pane, right-click MaxPosPhaseCorrection, then Modify, in the Edit DWORD Value box, under Base, click Decimal, under Value Data, type a time in seconds such as 3600 (an hour) then click OK. This adjusts the connection settings.
Now go back and click:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\config
In the right pane, right-click MaxNegPhaseCorrection, then Modify.
In the Edit DWORD box under base, click Decimal, under value data type the time in seconds you want to poll such as 3600 (an hour).
Exit Registry then restart windows time service by clicking Start/Run then typing:
net stop w32time && net start w32time.
on each computer, other than the domain controller, type: W32tm/resync/rediscover.
The time server should be now up and running.

Copyright 2008 © Richard N Williams

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Sunday, May 4, 2008

How to Create and Manage Access-Control Lists on Cisco ASA and PIX Firewalls

by Don R. Crawley

Access Control Lists (ACLs) are sequential lists of permit and deny conditions applied to traffic flows on a device interface. ACLs are based on various criteria including protocol type source IP address, destination IP address, source port number, and/or destination port number.
ACLs can be used to filter traffic for various purposes including security, monitoring, route selection, and network address translation. ACLs are comprised of one or more Access Control Entries (ACEs). Each ACE is an individual line within an ACL.
ACLs on a Cisco ASA Security Appliance (or a PIX firewall running software version 7.x or later) are similar to those on a Cisco router, but not identical. Firewalls use real subnet masks instead of the inverted mask used on a router. ACLs on a firewall are always named instead of numbered and are assumed to be an extended list.
The syntax of an ACE is relatively straight-forward:
Ciscoasa(config)#access-list name [line number] [extended] {permit | deny} protocol
source_IP_address source_netmask [operator source_port] destination_IP_address
destination_netmask [operator destination_port] [log [[disable | default] | [level]] [interval seconds]] [time-range name] [inactive]
Here's an example:
asa(config)# access-list demo1 permit tcp 10.1.0.0 255.255.255.0 any eq www
asa(config)# access-list demo1 permit tcp 10.1.0.0 255.255.255.0 any eq 443
asa(config)# show access-list demo1
access-list demo1; 2 elements
access-list demo1 line 1 extended permit tcp 10.1.0.0 255.255.255.0 any eq www
access-list demo1 line 2 extended permit tcp 10.1.0.0 255.255.255.0 any eq https
In the above example, an ACL called "demo1" is created in which the first ACE permits TCP traffic originating on the 10.1.0.0 subnet to go to any destination IP address with the destination port of 80 (www). In the second ACE, the same traffic flow is permitted for destination port 443. Notice in the output of the show access-list that line numbers are displayed and the extended parameter is also included, even though neither was included in the configuration statements.

You can deactivate an ACE without deleting it by appending the inactive option to the end of the line.
As with Cisco routers, there is an implicit "deny any" at the end of every ACL. Any traffic that is not explicitly permitted is implicitly denied.
**Editing ACLs and ACEs**
New ACEs are appended to the end of the ACL. If you want, however, to insert the new ACE at a particular location within the ACL, you can add the line number parameter to the ACE:
asa04(config)# access-list demo1 line 1 deny tcp host 10.1.0.2 any eq www
asa04(config)# show access-list demo1
access-list demo1; 3 elements
access-list demo1 line 1 extended deny tcp host 10.1.0.2 any eq www
access-list demo1 line 2 extended permit tcp 10.1.0.0 255.255.255.0 any eq www
access-list demo1 line 3 extended permit tcp 10.1.0.0 255.255.255.0 any eq https
Notice in the first line of the example above that an ACE is added at line one in the ACL. Notice in the output from the show access-list demo1 command that the new entry is added in the first position in the ACL and the former first entry becomes line number two.
You can remove an ACE from an ACL by preceding the ACE configuration statement with the modifier no, as in the following example:
Asa04(config)#no access-list demo1 deny tcp host 10.10.2 any eq www
In my next article, I'll show you how to use time-ranges to apply access-control lists only at certain times and/or on certain days. I'll also show you how to use object-groups with access-control lists to simplify ACL management by grouping similar components such as IP addresses or protocols together.
Copyright (c) 2008 Don R. Crawley

Don R. Crawley, CCNA-certified, is president and chief technologist at soundtraining.net, the Seattle training firm specializing in business skills and technical training for IT professionals. He works with IT pros to enhance their work, lives, and careers. For more information about soundtraining.net's accelerated Cisco ASA training, visit here.

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Saturday, May 3, 2008

How To Permanently Delete Files - The Quick, Dirty, And Correct Way

by John Cao

You may or may not know that when you drag items to the trash on your computer, they aren't permanently deleted. Just watch an episode of your favorite CSI show, and you'll see that its possible to recover files that haven't been deleted properly. And while I'm sure you're not guilty of any CSI type crimes (or are you???), I'm sure you want to figure out how to permanently delete your files and keep your private things private -- after all everyone has to have some secrets!
Why emptying your recycling bin doesn't permanently delete your files
When you tell your computer to empty its recycling bin, your operating system only deletes the records it has of the files you want to delete. Yet the files still remain on the hard drive memory.
Here's an analogy: If you think of your files as books in a library and you decide you no longer have use for a certain book. Emptying the trash is equivalent to removing the entry in the library's card catalog. The book is still there but not easily found by everyday visitors. But if someone really wanted to find it, and had a clue where to look, they quite possibly do so since it is still physically there.
What it means to permanently delete a file
To permanently delete a file, you need to not only delete its record, but also overwrite the physical portion of the hard drive where it lives. A low level format is equivalent to replacing your private file with random bits (1's and 0's). Continuing with the library analogy you need to remove remove the book, shred it, light up in flames and possibly replace it with a different book
A simple way to permanently delete?
According to Microsoft, there is a keyboard shortcut in Windows to, quote, "permanently delete files". You do this by selecting your file and hitting SHIFT+DEL. Convinced? Neither am I. What they're really explaining is a shortcut from having to move the item to the trash and then emptying the trash.

Take it a step further
Here's a poor man's version of permanent deletion. Delete your files, empty your recycle bin, and run Disk Defragmenter located in the Start menu under Accessories/System Tools. What this will do is optimize your hard drive by rearranging (most) of your files, and in doing so will most likely overwrite the files you want permanently deleted. Nice!
Do it right and do it better
While performing a defragmentation will probably do the trick, it's really not a viable solution. Waiting for disk defragmentation is not something I'd do every time I wanted to do a permanent deletion. The defragmentation process is waaaaay too long. The right way to how to permanently and quickly delete files is to use a program specifically designed for that purpose. You're in luck too because most Windows operating systems have a command line tool called CIPHER to do the trick!
Here's how to use CIPHER:
1. After closing all windows, open up a command window.
2. Type the following: cipher /w:driveletter:\foldername where driveletter and foldername correspond to the drive a location of where your deleted file used to live.
3. Sit back and enjoy your freedom and privacy while your file is truly permanently deleted!
Here's an example:
I have a picture I want permanently deleted which stored on my computer at the following location:
C:\images\scandalous_picture.jpg
After deleting this picture and emptying the recycle bin, I would type the following (in a command prompt) to ensure that I can still run for senator (as long as they don't catch me in the airport bathroom):
C:>cipher /w:C:\images
I can then move on to my life of privacy and carefree surfing!
You can do better!
Although I'm comfortable working with the command prompt, you may not be. No worries, there are plenty of other graphical based software tools that perform true permanent file deletion. This article gives even more compelling reasons to delete personal files and refers a graphical based deletion tool called Evidence Nuke.

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Friday, May 2, 2008

Timing Is Everything - Ntp And The Importance Of Accurate Network Time Synchronization

by Richard N Williams

On occasion we all need to know the time and we have a multitude of different devices to tell us it; from our mobile phones and wrist watches to the office wall clock or the chimes on the radio news.
But how accurate are all these clocks and does it matter if they are all telling different times? For our day-to-day business it probably doesn't matter too much if the office wall clock is faster than your wrist-watch your boss probably won't fire you for being a minute late. But in some environments accuracy and synchronization are vital where a minute can make all the difference in something being sold or not or even something being stolen!
Time synchronization in modern computer networks is essential. It not only provides the only frame of reference between all devices, it is critical in everything from securing, planning and debugging a network to providing a time stamp for applications such as data acquisition or email.
Most PC's and network devices internal clocks, called Real Time Clock chips (RTC) providing time and date information. The chips are battery backed so that even during power outages, they can maintain time. However, personal computers are not designed to be perfect clocks, their design has been optimized for mass production and low-cost rather than maintaining accurate time.

Therefore these internal clocks are prone to drift and although for many application this is can be quite adequate, often machines that work together on a network will become out of sync with each other and problems can arise particularly with time sensitive transactions. Can you imagine buying an airline seat only to be told at the airport that the ticket was sold twice because it was purchased afterwards on a computer that had a slower clock?
NTP time servers (Network Time Protocol) use a single time reference to synchronize all machines on the network to that time. This time reference can be either relative (a computer's internal clock or the time on a wrist-watch perhaps) or absolute such as an atomic clock that relays UTC time (Universal Coordinated Time) and is as accurate as is humanely possible.
Atomic clocks are the most absolute time-keeping devices accurate to a second every 1.4 million years. However, atomic clocks are extremely expensive and are generally only to be found in large-scale physics laboratories. However, NTP can synchronize networks to UTC time via an atomic clock by using either the Global Positioning system (GPS) network or specialist radio transmissions (MTF in the UK).
While some organizations have to synchronize their networks to UTC such as airlines and the stock exchange, a network can be synchronized to any time and still function, but there really is no substitute for UTC time. Not only is it more efficient to have network synchronized with the rest of the world, a UTC time source is vital in providing security against fraud, data loss and legal exposure and without it, organizations can be vulnerable and lose credibility.
NTP (version 4) can maintain time over the public Internet to within 10 milliseconds (1/100th of a second) and can perform even better over LANs with accuracies of 200 microseconds (1/5000th of a second) under ideal conditions.
Note: it is strongly recommended by Microsoft and others, that external based timing should be used rather than Internet based, as these can't be authenticated. Specialist NTP servers are available that can synchronize time on networks using either the MSF (or equivalent) or GPS time server signal.

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Thursday, May 1, 2008

Benefits of Java 2 Platform, Enterprise Edition (J2EE)

by Vineet Kr. Singh

J2EE or the Java to Enterprise Edition platform developed by Sun Microsystems stipulates the criterion for developing multi-tier enterprise applications. The J2EE platform leverages the robustness of the Java programming language that allows developers to write the code only once and execute the application on any platform. Presently more than two-thirds of development managers use the J2EE platform to develop and deploy their applications.
Businesses all over the globe have realized that they can gain a sustainable advantage over their peers by developing custom applications for their unique business needs. Quick development and deployment are required whether in-house applications for raising employee efficiency are being created or rich internet applications to cater to the specialized needs of the clients are being developed. Another issue, which is of concern to enterprises, is the portability and scalability of their enterprise applications. An enterprise application is viable only when it is easily portable across platforms and devices. Scalability is also another parameter, which decides the long-term feasibility of an application. Enterprise applications must be scalable so that they can be scaled up to accommodate thousands of users simultaneously. J2EE based enterprise applications can be executed across platforms and are functional across devices.

J2EE based enterprise applications succeed because stable J2EE standards help developers create multilevel applications with a component based approach. Existing database management systems and legacy applications can be brought under one umbrella so that the critical requirements of the enterprise can be fulfilled. J2EE, in our opinion, has a very bright future and the recent addition of interoperable web services and other new services in version 1.4 will make it even more market-friendly.

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Wednesday, April 30, 2008

Defrag Your HDD! (It's Not As Painful As It Sounds)

by Scott Drinkard

One of the easiest ways to boost overall performance from your PC is to do regular hard disk maintenance. It's not glamorous or even exciting, as a matter of fact, it's downright boring. However it is relatively painless and easy to do. In this article, I want to discuss defragmenting your hard drive. I'll give you a moment to finish yawning before continuing.....OK feel better now? Let's get to it. Most PC users, even a lot of beginners, know about the defrag utility built into Windows. Some people even use it occasionally. However, judging by my experiences in the field, even those who use it fairly regularly could use a few pointers on how to get the most out of it.
First of all, what is disk fragmentation? We could get really technical and discuss file systems, cluster sizes and the like but I doubt you want to read it anymore than I want to write about it (BORING!...). You don't really need to understand all of the technical details to understand that fragmentation can and does have a big impact on overall computer performance. I should explain however, that of all the major components of your computer, the hard drive is far and away the slowest. Knowing this, it should make sense that anything we can do to help this "weak link" with performance will improve the the overall computing experience.
Without going into a lot of detail, I'll start with a brief explanation of how a hard drive works and what causes data fragmentation. Ready? Here goes: The hard drive has a series of platters that contain all of the stored data on your PC (including the operating system, programs and all of your personal data). These platters rotate at a high rate of speed and as they rotate, a mechanical read/write head moves along the surface of the platters and... well, reads and writes data. Your data is stored on this disk in clusters. A single file usually consists of many of these clusters. Over time as you use the computer these clusters get scattered all over the drive and as a result, the files contained in the clusters become fragmented.
The reason that this negatively affects performance is that when the read head looks for a particular file, it can find that information much faster and more efficiently if the clusters containing that file are in contiguous order as opposed to being scattered all over the drive. Think of it this way: If you have a stack of money in various bill denominations, how much faster and more efficiently could you count it if the bills are grouped according to denomination and placed in descending (contiguous) order! The process of defragmentation finds these scattered clusters of data and puts them back in order so that the read head can find them faster.

Now that you are familiar with that concept, let's get going with the defrag. For those of you who aren't familiar, the windows defrag utility is located under 'Start > All Programs > Accessories > System Tools'. When you start the application, the user interface is pretty straightforward. You just select the drive that you want to defragment and click the button that says "Defragment". If you don't do any more than this, you'll go a long way toward improving the responsiveness of your computer. However, there are a couple major limitations in the defrag utility that can easily be overcome if you know what to do. Here are a couple of tricks you can use to really get the most out of the defrag process.
Temporarily remove the pagefile. Windows uses a section of the hard disk as virtual memory to help speed up performance of the PC. This virtual memory space is known as the paging file or swap file. Windows uses this reserved space to move frequently accessed data into and out of as you work (or play) on your computer. Because this space is reserved as system file space, the defrag utility cannot defragment this section of the disk. This reserved space can be quite large and will become very fragmented over time and since this is the first area of the disk that is accessed by the system when requesting data, it goes without saying that it's counterproductive for this file to be highly fragmented. So to get this file back in order you have to delete it. (?!) Don't worry, you are not going to delete anything important and it's only temporary. Here's how to do it:
First, save all work and close all open windows. Once you have done this, go to 'Start > Control Panel(Classic View) > System'. Select the 'Advanced' tab and click on the 'Settings' button under 'Performance'. Again, select the 'Advanced' tab and under 'Virtual memory' click the 'Change' button. Click the radio button that says "No paging file" and click the 'Set' button. Now close each dialog box by clicking 'OK' on each one. You'll get a message stating that the changes require the computer to be restarted. Click 'OK' and restart the PC. When the computer reboots it may seem a little sluggish, but that's OK because when you're finished with the defrag, you will restore the swap file and it will be one big contiguous file. That's a VERY good thing!
Now, before you run the defrag utility, there is one more thing you can do to help optimize the defragmenting process. If your PC has hibernation enabled (it is by default), it uses a file called hiberfil.sys to store the current state of your PC before it "goes to sleep". This file is then restored when the computer "wakes up" so that it is in the exact same state it was in before hibernating. The whole hibernation thing is a long story and the subject of another article, so for now just understand that hiberfil.sys is a very large file that becomes fragmented over time and because it is designated as reserved system space, can't be defragmented. So again, the solution is to remove the file. Windows doesn't need hiberfil.sys to run properly. It is only necessary if you want your computer to have the ability to hibernate when left unattended, so restoring hiberfil.sys is completely optional after you defragment the hard drive. To delete hiberfil.sys, right click any open area on the desktop and choose 'properties'. Select the 'Screen Saver' tab and click the button toward the bottom labeled "Power". When the 'Power Options' dialog box opens, select the 'Hibernate' tab. Remove the check from the box that says "Enable hibernation". The hiberfil.sys file will automatically be deleted.
Now that you have removed these two rather large and uncooperative files run the defrag utility as described above. This time the ENTIRE hard drive will be defragmented! See now, that wasn't so bad. After windows finishes defragging the disk, don't forget to re-enable the paging file. Navigate to the virtual memory dialog as described above and this time click the radio button that says "System managed size". Click 'Set' and close all the dialog boxes. Optionally, you can re-enable hibernation also, but it's not necessary unless you use the hibernate feature.
Well there you have it! A completely defragmented and optimized hard drive and it didn't cost you a dime. After following this procedure, you'll definitely notice that your PC has a little more "spring in it's step". I certainly hope this article has been useful to you. If it has, be sure to visit my website at http://www.odessacomputerguy.com and while you're there sign up for my newsletter. It's free and full of useful tips and tricks you can use to get the most out of your PC.

Scott Drinkard (The Computer Guy) is a self -employed computer service tech living and working in Odessa, Texas. The owner of Odessa based "The Computer Guy" has been helping the good people of West Texas with their computer problems for about 10 years. Please visit http://www.odessacomputerguy.com for more information.

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Tuesday, April 29, 2008

Holographic Storage Kills BluRay?

by John T Pratt

Holographic storage ships next month. The technology was in the works for decades before becoming a reality. Every now and then I read about something and go "wow - that's the future!". I remember when I was a kid in the 80's and my day telling me about computer storage and memory doubling nearly every six months. He also told me "someday you'll be able to carry your 30 albums or your entire record collection on a small postage stamp sized chip in your pocket." It seemed like something out of the movies back then, and yet my 4GB SD Flash card for my digital camera can hold about 1,000 songs which I guess is about 75-80 CD's (and it's about the size of a postage stamp).
We've all seen a holograph in a sci-fi movie. A holograph is a projected image that, if you moved around it, would actually have perspective form different angles. A holograph is a true "3D image". So, how do you turn a holograph into storage? Technically a holograph IS storage, because it stores information about the image to be projected. A hologram uses 2 laser beams. A reference and illumination beam create an interference pattern on photo sensitive media. Shine a laser on that reference pattern and get an image in 3D - simple as that. Robin Harris brings up to good points in that article, the first being that a small fraction of the reference data can reconstruct the entire 3D images (you just can't move as far around it). This means that unlike a CD or DVD, if the photo sensitive media is scratched it doesn't (completely) destroy the data. Imagine data that can "reconstruct itself" from the remaining bits. His other point was that the amount of storage is just about limitless. By changing the reference point and illumination of the beams different holographs can be produced - so hundreds (or more) could be stored in the exact same space on the media.

Oh - did I mention the fact that photographic media has a lifespan of over 100 years, so holographic storage has the longest lifespan of any media to date. The company that created this holographic storage technology is "InPhase" and the first units will be shipped for $18,000 next month. One disk costs $180 and stores 300GB.
Why do we care? For the same reason that both CD and DVD players were thousands when they first came out. This is the future of technology. Movie studios with long term storage needs will gladly pay $18,000 for this device, but as the prices drop I think that this kind of technology will be something that consumers need. You can buy a half-terabyte drive at your local Wal-Mart now for $100. I think it's great to be able to back up all of our digital pictures and music on an external drive for our home network. But as time goes on I will need multiple ones, and eventually some will fail - and eventually I'll lose some really cherished memories. I think that's why a lot of people I know print out so many digital pictures on photo paper - they know that if somehow the digital copy is lost, the printed version should last a lifetime. If InPhase eventually created a consumer version holographic storage drive, wouldn't you buy one? I mean come on, you could store you family digital photos knowing that the media would be good up to 100 years. I know of no other storage technology other than printed photos themselves that could give you that kind of piece of mind.
Think about the industry uses this could bring. Movie theaters could ship out their blockbusters to the theaters on these disks knowing the quality wouldn't diminish no matter how many times they were rented out. Web hosts could practically offer "uncorruptable backups". You may not know this, but your local cable company usually has movies "downloaded" on their local server for the video "on demand" services you can watch. With holographic storage they could store tens of thousands of movies for you to watch, and not just hundreds. Unbelievable amounts of data could be stored in black boxes of planes, trains, and automobiles. You could possibly take your entire entertainment system from your living room to your car on one disk. Entire textbooks could begin to be stored on disk cartridges to be read in standard readers and books in schools and universities would not only be cheaper, but the quality of the content would never diminish (just the hardware readers to view them).

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Monday, April 28, 2008

Debunking Wireless Urban Legends, Part I - Wireless Networks are Intrinsically Insecure

by Lawrence Allhands

Securing a wireless network is serious business for any IT professional, but how secure do you need to be to truly protect your network from being attacked and ultimately compromised, and which techniques will best afford the desired results? WEP, WPA PSK, WPA Enterprise, WPA2 PSK, WPA2 Enterprise; with all of the wireless security standards and options available and conflicting advice of supposed wireless experts, it's no wonder confusion reigns supreme resulting in the perpetuation of urban legends. To develop a comprehensive wireless security plan, it is essential to know the facts, so we will first discuss the various wireless security options available.
If you know the enemy and know yourself, you need not fear the result of a hundred battles. If you know yourself but not the enemy, for every victory gained you will also suffer a defeat. If you know neither the enemy nor yourself, you will succumb in every battle. - Sun Tzu
Wireless security options
· WEP (Wired Equivalent Privacy) - A deprecated wireless security protocol initially introduced in 1999 to secure 802.11 wireless networks. In 2001, many serious cryptological weaknesses were identified resulting in WEP being compromised within a matter of minutes.
· WPA (WiFI Protected Access) - A wireless security system developed in response to the weaknesses of WEP. WPA was designed to replace WEP while the full security standard (802.11i) was being developed in the form of WPA2. WPA implements the majority of the 802.11i standard and was specifically designed to work with first generation (pre-WPA standard) wireless network interface cards.
· WPA2 (802.11i - WiFI Protected Access) - A wireless security system utilizing the full mandatory elements of the IEEE 802.11i standard. WPA2 employs a new AES-based algorithm, CCMP, which is considered fully secure. WPA2 will not work with some older network cards.
· PSK (Pre Shared Key) - A "shared secret" which is shared between two parties using some secured channel prior to use. PSKs may be from 8 to 63 printable ASCII characters or 64 hexadecimal digits and may be used in the following forms;
o Password - dog679leg
o Passphrase - Spiderman beat Batman in 1994
o Hexadecimal string - 4E102AB2511CEE541
· Enterprise (802.1x RADIUS authentication) - Enterprise is meant for use with an 802.1x authentication (RADIUS) server, which distributes different keys to each user after authenticating credentials. This is the most secure wireless networking technology in existence today.

Urban Legend: WEP can be cracked in a matter of minutes
Status: True
Details: Early in 2001, Ian Goldberg, a cryptologist at Montreal-based security and privacy software developer Zero-Knowledge Systems Inc., along with researchers at the University of California, Berkeley, uncovered flaws in the IEEE 802.11 standard allowing them to read WEP-protected traffic, inject traffic onto WEP-protected networks, and modify WEP-protected data. Essentially WEP is assumed to be cracked now.
Solution: Never use WEP! If for some reason you have to, add additional layers of security such as virtual private networks (VPN) or the IPSec security protocol, before allowing data to cross from a wireless network to a secure corporate system.
Urban Legend: WPA PSK & WPA2 PSK have also been cracked in a matter of minutes
Status: False
Details: In late 2004, many headlines stated that WPA had been cracked. In reality, the standard had never been cracked, but the WPA PSK implementation with a weak "shared secret" had been cracked. Here is how it works; a hacker uses a tool to scan the wireless airwaves for access points and wireless clients. When he finds a wireless client, he kicks him off the target access point by injecting DeAuth packets between them. Then the hacker watches as the client re-associates, completing the handshake with the access point. In doing so, he recovers the encrypted "shared secret" (The PSK). Now the hacker has captured the encrypted key file on his computer, but he must use a brute force dictionary attack to actually get a working PSK and gain access to network resources.
A dictionary attack varies from a brute force attack slightly. Where a brute force will simply try every combination of characters in a password, a dictionary attack will use a list of common words and pass phrases first to try and guess a password. The hacker will most likely try a dictionary attack first hoping for a quick break. If the password is randomly generated, he will be forced to use the brute force method.
The time it takes a brute force attack to guess a password is a function of the computing power (Number of attempts per second), and the length of the random password. For instance, if a hacker can test 100 words per second, and you used a single character random password consisting of a-z, A-Z, and 1-0 (72 characters) it would take approximately .72 seconds to crack it.
72^1 character combinations / 100 character combinations per second = .72 seconds
If we move form a single character to an eight character random password we get the following
72^8 character combinations / 100 character combinations per second = 7222041363087.36 seconds or approximately 319,849 years.
Once the hacker has successfully guessed your password, he will have the plain text PSK and will be able to freely access your network resources.
Solution: If you use WPA or PWA2 PSK, make sure you use a long random key. Most experts recommend a 20 character key for minimum security, but you may use a key up to 63 characters long for very high security. There are many random WPA key generators on line, use one to ensure a truly random key. Finally, rotate your keys annually, this will ensure your WPA PSK network is very secure.
Urban Legend: Using "wireless LAN best practices" such as SSID suppression, MAC address filtering. Static IP address schemes and RF signal suppression makes my network even more secure.
Status: False
Details: Many so called wireless experts would have you believe that using widely published "wireless LAN best practices" in conjunction with 802.11 wireless security measures will make your network even more secure by making it harder to detect or creating multi-layered security. These practices include;
· SSID suppression
· MAC address filtering
· Static IP address schemes
· RF signal suppression or shaping
The fact is that an experienced hacker using freely available hacking tools will automatically defeat these measures in a matter of seconds. In reality, there is no layered security and these measures only create a false sense of security and cost valuable IT resources.
In addition to this, SSID suppression can make your wireless network less secure because it forces your wireless clients to actively probe for the SSID, broadcasting continuously wherever you go. This can make you vulnerable to an evil twin attack or data seepage, which gives valuable information that can be used by a hacker in social engineering.
Solution: Don't waste time or resources on these "wireless LAN best practices", they will not help secure your network, and may even make your network less secure in the end.
In conclusion, a wireless network can be effectively secured using either WPA or WPA2 Enterprise or WPA or WPA2 PSK with a randomly generated key of 20%2B characters. Anyone who tells you anything else is just perpetuating a wireless urban legend.

Lawrence W. Allhands
Director of Customer Service
Apprion, Inc.
http://www.apprion.com

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