On Thu, May 26, 2005 at 01:23:56PM -0400, James Ebright wrote: > > Now, if 25 inbound was shut down (which I could see an > > ISP doing) then I would seriously be in trouble because there'd be > > no inbound email any longer. > > Why would an ISP shutdown port 25 inbound? I see no logical reason to do so, > spam does not get delivered directly to a users desktop (at this time at > least). The zombies are not controlled via port 25 inbound (at least any I > have seen). In other words, I know of no good reason to shutdown port 25 > inbound... now port 25 outbound, yes, definately for dynamic IP space.
You must block port 25 in both directions to prevent 'triangular routing attacks' from working. -- Kelsey Cummings - [EMAIL PROTECTED] sonic.net, inc. System Architect 2260 Apollo Way 707.522.1000 (Voice) Santa Rosa, CA 95407 707.547.2199 (Fax) http://www.sonic.net/ Fingerprint = D5F9 667F 5D32 7347 0B79 8DB7 2B42 86B6 4E2C 3896 _______________________________________________ Visit http://www.mimedefang.org and http://www.canit.ca MIMEDefang mailing list [email protected] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
