Yahoo Messenger - Blocking

From: Paul Hutchings (paul.hutchings@gmx.netNOSPAM)
Date: 02/10/02 

From: Paul Hutchings <paul.hutchings@gmx.netNOSPAM>
Date: 10 Feb 2002 20:17:00 GMT

Looking for the definitive answer on how to block this at our firewall (ISA
to control internal -> external access behind Checkpoint FW-1).

Some say block port 5050, others say block access to "msg.edit.yahoo.com".
I know if I fire it up on my machine here at home and run netstat it sees
connections to msg.sc5.yahoo.com.

Is there a definitive way of blocking it?

TIA
Paul 

-- 
Paul Hutchings
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