[plug] [OT] signs that you're having a bad day: and why

Leon Brooks leon at brooks.fdns.net
Thu Sep 18 09:17:09 WST 2003


On Wed, 17 Sep 2003 23:15, Luke Dudney wrote:
> The bulk of it was from just a few. But by the time you've got 45,000
> messages addressed to anywhere between 400,000 - 800,000 recipients
> mixed into the queues of three servers, the damage has been done.

Want to know why your mail servers are churning? Install the BIND patch 
and they'll stop:

    http://yro.slashdot.org/article.pl?sid=03/09/17/1154242

The nub of the matter is that VeriSign are now answering for nonexistent 
domains, INCLUDING FOR EMAIL, so every time a spammer sends you stuff 
from a crap domain, your email servers try to bounce it... to VeriSign.

Needless to say, VeriSign now has the mother of all overload problems, 
and you're about to run out of queue space if you don't block their IP 
address (and bin *all* mail to that IP) in a hurry.

D'ya think VeriSign might be in just a teensy bit of trouble for 
breaking email servers and proxy caches the world over by answering DNS 
requests that weren't supposed to be answered?

Cheers; Leon

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