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Re: ISPs are asked to block yet another port
From: Jack Bates <jbates () brightok net>
Date: Mon, 23 Jun 2003 15:05:47 -0500

Christopher L. Morrow wrote:

This is what our, atleast, abuse team calls 'fantasy mail'. There is a fix
for it, port 25 in and out filtering for radius customers. The 'problem'
as I understand it, is that the change would be a contract change so it
has to wait for expiration of said contract to be enforced... :( Its a
sucky world sometimes. Perhaps Paul complained to
ATT/<other-unnamed-provider> with logs and such? :)

There is another fix for it. If neither provider allowed spoofing, then the individual couldn't send spoofed packets out one way and allow the syn/ack back via the other. Of course, there are better reasons for spoof protection ingress/egress than a little port 25 traffic.


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