[3741] in linux-net channel archive
Re: TCP denial of service?
daemon@ATHENA.MIT.EDU (Jon Lewis)
Wed Jul 17 21:57:44 1996
Date: Wed, 17 Jul 1996 02:33:36 -0400 (EDT)
From: Jon Lewis <jlewis@inorganic5.fdt.net>
To: Troy S Muller <tmuller@agora.rdrop.com>
cc: Linux Net Mailing List <linux-net@vger.rutgers.edu>
In-Reply-To: <31EC823C.3F239E72@agora.rdrop.com>
On Tue, 16 Jul 1996, Troy S Muller wrote:
> Sounds to me like a network issue. If your router is out, no doubt you
> can't do anything. You would have only be able to get to the system if
> you are on its subnet.
No...the system refusing connections to port 25 was on my local ether.
The routing outage was what caused the pileup of SYN's on the local mail
server. These then blocked any more mail connections. Other services
were not affected. It's been suggested that upgrading/patching sendmail
might helpp...and that is on the todo list.
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