I achieved that using content advisor and it works great on win xp systems but only issue is you need to do the same in all systems manually.. but it works and free...
Block Internet……
o enable this functionality via Content Advisor:
01. Save the following as ASCII text to %SystemRoot%\System32\noaccess.rat, using Notepad:
((PICS-version 1.0)
(rating-system "http://www.microsoft.com")
(rating-service "http://www.microsoft.com")
(name "Noaccess")
(description "This file will block all sites.")
(category
(transmit-as "m")
(name "Yes")
(label
(name "Level 0: No Setting")
(description "No Setting")
(value 0) )
(label
(name "Level 1: No Setting")
(description "No Setting")
(value 1) ) ))
02. Control Panel / Internet Options.
03. Select the Content tab.
04. Press Enable. If see a Disable button, you are already using Content Advisor and may loose your settings. To proceed, press the Settings button instead of the Enable button.
05. Select the Content Advisor / General tab and press the Rating Systems button, removing all existing entries.
06. Press Add and select the Noaccess rating system.
07. Press OK to close the Rating Systems window.
08. Select the Approved Sites tab.
09. Enter the URL of an approved site and press Always.
10. Add other sites.
11. Leave all the default settings. If you previously used Content Advisor, select the:
General tab and make sure that Users can see sites that have no rating is NOT checked.
Advanced tab and set the Ratings bureau list box to [None].
12. Press Apply and OK.
Block Internet……
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