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| Subject: | Re: how to block ALL AIM traffic ? |
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| Date: | Thu, 28 Apr 2005 00:29:44 +0200 |
I am at an office with 50~ machines , out of thoes about 20 or so use AIM. I would like to block AIM and normally i'd just block the AIM port (5190) or whatever it is..
BUT AOL seems to have found a great way around this and has 4000+ diffrent ports they use and i'd assume lots of diffrent hosts.
Whats the best way of blocking all AIM traffic ?
I'm not sure about AIM, but since it is somewhat compatible with ICQ, I think I can compare these two. For ICQ it is IMHO not possible to block ICQ traffic with port-based firewalling, since you can use almost any port with ICQ (it works even over port 25 or 53), so I think you can always find a port that is open in the firewall. Except you block all traffic and allow internet access only via proxy. Then you can do aa application or protocol based (means content-aware) filtering, which should work for these protocols.
best regards, Markus
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