Currently Browsing: Networking


Configure Windows Server 2008 R2 as a RADIUS Server

You can configure Windows Server 2008 R2 to authenticate users connecting to a wireless network using WPA-EAP or WPA2-EAP (also known as WPA-Enterprise or WPA2-Enterprise) authentication. This video, created for the second edition of the Microsoft Press 70-642 Training Kit, shows you exactly how to do that.

Watch in 720p, full-screen.

Find the dB of a wireless access point

A question from a reader:

Tony do you know of a “Simple” program that will measure antenna signal
strength in dB while you are connected to your wireless link. I guess it could
be called a signal strength meter. The ones avaiable either show you in a
bar graff or some other rediculas manner that is good for Non Tech folks but
to most of us Geeks it would be nice to be able to see the readout in dB so
the antenna could be fine tunned for the best signal.

And my (less-than-perfect) answer:

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Slow Wireless Performance with a New Linksys Router

Hi Tony,

I read your article about 10 tips for improving your wireless connection and I have a question for you.

I have an apple mac book pro computer and my husband has an ibm thinkpad. We moved into a new house in July and ever since we moved into our new house my wireless connection has not been working well at all – it is extremely slow but my husbands computer works great and has a very strong wireless connection. The strange thing is it worked fine at our last home with the same set up except that instead of using our apple airport we are now using a linksys router that is connected to our dsl modem. If I take my computer outside of the house and get on another wireless network the internet works fine. The other thing we have tested is actually hardwiring my computer into the router directly and it still didn’t work quickly at all so I am wondering if there is a problem with my computer (being an apple) with a linkys router?

Any ideas? I have been working on this issue off and on for a while now. We have even had our tech guy come out and take a look and he can’t seem to figure it out.

Thanks for you any ideas you may have.

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AT&T Elite Speed with Wireless Network

Tony, your Microsoft article was awesome and beneficial. Didn’t quite understand the below though. We have AT&T Elite speed and wish we didn’t have to pay too much for a moderate speed. Does this apply to AT&T tech? What questions should we be asking? Thanks for information and we will keep your home page a favorite. Good luck!

802.11b is the most common type of wireless network, but 802.11g is about five times faster. 802.11g is backward-compatible with 802.11b, so you can still use any 802.11b equipment that you have. If you’re using 802.11b and you’re unhappy with the performance, consider replacing your router and network adapters with 802.11g-compatible equipment. If you’re buying new equipment, definitely choose 802.11g.

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Microsoft Virtual PC vs. Sun VirtualBox

The video above and the article below compare two free virtual machine applications designed for home users: Microsoft Virtual PC and Sun VirtualBox.

What is a Virtual Machine (VM)?

A virtual machine (VM) is a computer that runs inside a window on your host computer. VMs are also great for testing–you can test different operating systems, applications, and configurations without messing up your computer. For example, you could run Windows in a VM on a Linux or Macintosh computer, allowing you to run Windows-only applications. Or, you could test out Linux in a VM on your Windows box without committing to it.

In fact, even if you install spyware, adware, or rootkits in a VM, they won’t infect your host computer. Just shut down the VM, and your computer is as clean as ever. VMs are also a great tool for learning networking, allowing you to connect several different computers when you only have one computer available.

After the jump, my recommendations for home users who want to use VMs:

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Reader Question: Dial-up VPN and Active Directory
Hey Tony!

I am having some quirks with XP Pro, particularly using Active Directory across a “dial up” VPN. We don’t have VPN boxes here, just desktop clients.

Todd

“Unknown Error” connecting to the Internet

Question:

Hello Tony:

Well, here’s one for you…

I purchased Windows Vista and a brand spankin’ new computer a month ago.  Needless to say, it’s bee harried at best!

Well, anywho, here’s the problem now:

Periodically (often, but not always), when I try to get online via email or internet (I have DSL), a window pops up and says “unknown error” and won’t let me get connect.

THEN a window comes up and asks me if I want to let the computer try to diagnose the problem.  I say yes. Then it says that I have more than one network connected or something like that and that I need to unplug one of them for 10 seconds….

Well, I don’t have more than one connection. So, I go into the place where you “repair network settings…” It doesn’t work, but I see my network listed, then another one called “unidentified network” listed! This isn’t all the time.

Well, after much on/off trying to get onto the internet, eventually, a window comes up and asks me if I want the computer to try to “reset” or repair or something like that, my network settings. I say yes, and it repairs. Then I can go online. Any answers?

D

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