If you want to stop on network then you need to install CCproxy on your server, its nice software with custom configuration for every IP. Just put the keywords you want to block the content for that specified user and done.
thunderstorm98
Veteran Poster
1,117 posts since Nov 2006
Reputation Points: 97
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In CCproxy there's not only one option about website blocking but also it provides Web content blocking. Check it.. !
thunderstorm98
Veteran Poster
1,117 posts since Nov 2006
Reputation Points: 97
Solved Threads: 20