Restrict Youtube and other websites in my lan

Hi.

I'm the administrator of my LAN.

I have a Windows 2003 server, a 3com switch (where all my PCs are connected) and a Linksys router that shares the Internet connection with all the PCs in my lan...

I want to restrict websites like YouTube and other "streaming-video" sites in my network... how can i do this task?

Thank You

kalvilloAsked:
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LauraEHunterMVPCommented:
The most effective solution is Internet filtering software, available at various price points depending on the size of your environment.

You can use the IE Content Advisor, but it's difficult to manage at scale: http://www.windowsnetworking.com/kbase/WindowsTips/WindowsNT/RegistryTips/IEandExplorer/IEContentAdvisorPassword.html
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kalvilloAuthor Commented:
Any software that you could recomend me?
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LauraEHunterMVPCommented:
ISA, Websense, SurfControl, numerous others.  Freeware options probably available on Sourceforge, thought I can't specifically recommend any.
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TG TranIT guyCommented:
The cheap/free method (can be bypass by savvy users) is to configure your DNS to point youtube.com to some internal page saying IT policy not allow these sites.

1.  Create DNS zone for youtube.com
2.  Create A record www and point it to <internal webserver>
3.  Repeat these steps for all the sites you want to block
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kalvilloAuthor Commented:
tgtran

I like your solution, but i don't know how to do that, Could you be a little more specific?
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2PiFLCommented:
We use Websense and it's worth the price.  I haven't had an incidence of spy/malware since we started using 2 years ago.
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TG TranIT guyCommented:
This KB maybe helpful to you:
http://support.microsoft.com/kb/323445

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Michael WorshamStaff Infrastructure ArchitectCommented:
Untangle -- (www.untangle.com)

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