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block bing videos and facebook chat

i am new to squid.. i have blocked the streaming extentions.. but still guys can access the bing.com/videos.. although i have added URL in my blocked sites.. but still its accessible..

and second question is, i have allowed some users to facebook and twitters sites.. how can i block facebook chat from browser for these users.. thnks
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sabk3
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sabk3
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1 Solution
 
xmlmagicianCommented:
i think you should implement opendns with it and it will sort it out

http://www.opendns.com/support/article/220
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xmlmagicianCommented:
i am sure there is a way to directly block them as well.
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sabk3Author Commented:
wht is direct way..?
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farzanjCommented:
You need to do the following:

Use netstat when they are using the undesirable video applications.  Through netstat you have to notice the details of their connection including the port number a particular application is using.

This way you would also know if they have been forced to go through Squid web proxy at all.  If they are not using Squid, then the answer is obvious as to how they can access those applications.  If they have been forced to use the Squid proxy, then you have to block their application ports as well.
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sabk3Author Commented:
is there any straight way to block in squid... as we block sites nd streaming extensions in squid..???
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farzanjCommented:
It cannot be simpler.  Applications in TCP/IP are recognized by port numbers.  This is exactly what I am telling you to do, since it seems like you need to block some applications.  It can be accomplished so easily in Squid

http://www.cyberciti.biz/faq/linux-unix-squid-proxy-filtering-particular-port/
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sabk3Author Commented:
i think chat does work in web browser which normally works on 80 and 443.. isnt it??
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farzanjCommented:
>>i think chat does work in web browser which normally works on 80 and 443.. isnt it??

Squid runs on port 3128.  It doesn't matter what port number is, you have use iptables and squid can handle it.  This is called transparent proxy with iptables.

If you want to simply block a chat port, you can use iptables simply to block it.  If you want it to be more configurable then you use iptables to first make it go through port 3128 (squid) and then squid can manage it further.

http://www.cyberciti.biz/tips/linux-setup-transparent-proxy-squid-howto.html
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sabk3Author Commented:
good
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