How do I block web based chat.

Message

Randy R · Post by **Randy R** » Sun Mar 05, 2006 3:32 pm

I know, I know GNU, Feedom etc.

I have a small network at home that my small children play games on some of which are web based. Some of the sites hosting these games also have chat on thier web sites. What I want to know is do I have to block the entire site, or is there some way to block the chat?

My current setup:

gateway server (gentoo obviously):
-Squid - transparent proxy
-Dans guardian
-Shorewall

Computers:
-mix of windows and linux machines
-any one of the internal machines may be used by the children

Thanks in advance for any ideas

Post by **NeddySeagoon** » Sun Mar 05, 2006 4:47 pm

Randy R,

It may be suffcient to block the port that the chat runs on, as long as its not port 80.
That would block browsing too.

Run tcpdump while connected to the chat, it will show what port is in use. If its all port 80, its everything or nothing.

Taladar · Post by **Taladar** » Sun Mar 05, 2006 5:07 pm

If you want to limit them to certain sites you can just use a (transparent or not) proxy and filter out all urls they shouldn't visit (or even better, list all allowed ones if they are not too many). You can then stop all direct connections (around the proxy) with some iptables rules.

Post by **pjp** » Sun Mar 05, 2006 6:26 pm

Moved from Gentoo Chat

nunogt · Post by **nunogt** » Mon Mar 06, 2006 11:01 am

Disabling javascript and other scripts for that specific address on your browser will do the trick. There are firefox extensions that do just that. Check http://www.noscript.net

Randy R · Post by **Randy R** » Sat Mar 11, 2006 12:40 pm

Thanks all for your replies. Blocking with the browser will probably bet cumbersom after a while. I am just going to block the entire site each time I think.

thecooptoo · Post by **thecooptoo** » Sat Mar 11, 2006 2:05 pm

add a phrase to dansguardian eg 'chat login' and stop it that way