dipankar pradip mitra spewed into the ether:
>i want to know how to stop people from using msn or yahoo messenger etc. on my
>network.
Easy solution:
Set an AUP that no one can use IM/IRC/Chat during office hours
Fire the first person you catch violation the policy.
That should get everyone else into line.
This is a people problem, not a technical one.
Get management to solve it.
>they are accessing the net through squid proxy running on redhat 7.0 on port 3128.
A technical solution?
Try
/sbin/ipchains -A output -i $external_interface -s 0/0 -d cs.yahoo.com -j DENY
/sbin/ipchains -A output -i $external_interface -s 0/0 -d msn.com -j DENY
This will work. Brute force. (There is a list of msn ip's available, search for those
and block only those if you wish).
Devdas Bhagat
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