Nicolas Ecarnot wrote:
I'm setting up more and more Xterminals and all the users are able to surf on the internet.
We are looking for a way to filter some access, but I don't see how to do that because the X server (well ok, client) is able to surf on the internet (i.e. our firewall is set up to let the X server access the internet as it needs it).
With "filter some access" you mean blocking the internet access fore some users? For this you can use the owner module for the iptables: "iptables ... |-m owner --uid-owner bed_boy ... -j DROP"
Or you mean blocking some URLs? then can make filtering with squid (transparent proxy) and other tools like squidguard or dansguardian
A nice example is this:
http://software.newsforge.com/software/04/06/23/1521209.shtml
More Information:
http://www.tldp.org/HOWTO/TransparentProxy.html (Transparent Proxy with Linux and Squid mini-HOWTO)
or google with the keywords: transparent proxy squid iptables
Happy Hacking! Karl |
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