Firewall Wizards mailing list archives
RE: AOL, Yahoo, and Instant Messaging
From: "Noller, Gregory" <Noller2G () kochind com>
Date: Fri, 31 Aug 2001 14:16:54 -0500
We've found that Yahoo Messenger does not play nice with proxy servers, and our internal customers require YM. We had to tell our firewall to allow outbound YM and tell our MS Proxy servers to fwd YM to the firewall. Greg [Noller, Gregory] <snip>
basis. Yahoo! Messenger can be blocked in a similar way, by killing off outbound access to the hosts answering to the following names: msg.edit.yahoo.com edit.messenger.yahoo.com csa.yahoo.com csb.yahoo.com csc.yahoo.com Each of the above names resolves out to multiple IP addresses-and, of course, Yahoo! can add new addresses at any time, making it an ongoing battle.
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- RE: AOL, Yahoo, and Instant Messaging Noller, Gregory (Sep 03)