how to restrict browsing the internet from client machines

I would like to block the internet browsing of 7 out of 9 users on the network, but the machines should be able to access the internet to automatically update the antivirus.

the server is Microsoft Windows Server 2003 R2.
Client Machines are Windows XP Professional.
Ozzie101Asked:
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B HCommented:
does your router/firewall device support this?  that would be best.

we use the zyxel zywall 2, it allows for you to specify which ip addresses can access which sites, or deny all sites except a specified list... or block certain sites but allow everything else... etc

http://www.zyxel.com/web/product_family_detail.php?PC1indexflag=20040908175941&CategoryGroupNo=FF94F854-B6F1-47B7-BFB7-4660CF8649C8

there isn't anything built-in to windows that will allow for you to do this...
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wolfcamelCommented:
you can use a group policy to set a proxy setting in internet explorer - set it to something that doesnt exist or isnt a real proxy.
alternatively - to block some sites for all users - put a dns entry in on your server so when they try to go to the site it wont come up.

each of these methods isnt perfect - ideally you need to run a firewall or proxy server that integrates with active directory.
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DonNetwork AdministratorCommented:
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B HCommented:
any dns solution is going to require entering every possible domain/host name and setting them to 0.0.0.0 or something invalid

steadystate is awesome for locking down what users can do on the machine but i dont see how it can lock down web browsing

turning on a proxy will prevent windows update, and might mess with other 3rd party programs that rely on the IE proxy settings
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DonNetwork AdministratorCommented:
"any dns solution is going to require entering every possible domain/host  name and setting them to 0.0.0.0 or something invalid"


No it is not!!!
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DonNetwork AdministratorCommented:
"steadystate is awesome for locking down what users can do on the machine  but i dont see how it can lock down web browsing"


Web addresses allowed option




featurerestrictions.png
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Ozzie101Author Commented:
All,

what about using " Set Program Access and defaults " within Windows XP?

if I restrict Internet Explorer, would my antivirus update automatically?
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B HCommented:
windows updates will run even if you set the default web browser to something else

set program access and defaults is just saying what programs you want things to open in, not weather or not it should be allowed
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DonNetwork AdministratorCommented:
Try Steady state with the "Prevent internet access(except websites below)" option.


Steady state is free and from microsoft and also has the option of "Windows Disk Protection" which is comparable to Deep Freeze
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Windows Server 2003

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