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RE: Speaking of DDoS attacks
- From: Rowland, Alan D
- Date: Thu Jul 12 19:26:16 2001
In my humble opinion it looks like something at your mail server.
18.104.22.168 is trapdoor.merit.edu , their mail server, which appears to be
re-sending the original 10 Jul mail.
The original hit their mail server 10 Jul. This copy was forwarded to your
XXX (is this the actual header or are you protecting the innocent?) on 12
Your work mail server may not be properly acknowledging receipt of the list
mail so Merit's server continues to re-send (for the default 4 days?) until
the resend TTL.
A trace to 22.214.171.124 dies at 500.Serial2-2.GW1.HNL2.ALTER.NET so I'm not
sure what's hanging there but I'd look at your mail agent configuration.
A second possibility is some non-standard character in your work mail
address. You don't say what it is but if there is a character in it that is
benign on your system but meaningful to Merit's mail system, there may be a
I've been the victim of a similar "attack" in the past as a result of the _
in my address.
Just my 2¢
From: Robert Cannon [mailto:firstname.lastname@example.org]
Sent: Thursday, July 12, 2001 1:46 PM
Subject: Speaking of DDoS attacks
Speaking of DDOS attacks, there seems to be one going
on associated with the NANOG list. I was wondering if
anyone could offer insite.
At my work address, I have received the same email
from NANOG about every 10 - 15 minutes. I have
received hundreds of copies of this email. Yet at
this address I do not receive the repeated copies (and
no one else on the list appears to have complained).
If I look at the header of the email, the last hop, if
I am reading it correctly, is named
mrbig.la.interpacket.net. I have since unsubscribed
from NANOG from my work address yet still receive the
emails. Also, this has been going on for over a week
(since a rule filters all my nanog email into a
folder, it has not bothered me too much) - every few
days, the email that I am repeatedly hit with changes.
Currently, the email I am being hit with is "OT: The
End of Empire."
Below I have pasted the header of the email
I would be curious to hear people's thoughts about
this. Is this a type of a DDOS? Anyone familiar
Received: from XXXX
by XXXX; Thu, 12 Jul 2001 16:01:40 -0400
Received: by XXXX; id QAA14070; Thu, 12 Jul 2001
16:01:38 -0400 (EDT)
Received: from unknown(126.96.36.199) by XXXX via smap
id xmaa13982; Thu, 12 Jul 01 16:00:42 -0400
Received: by trapdoor.merit.edu (Postfix)
id BB70F91231; Tue, 10 Jul 2001 14:35:31 -0400 (EDT)
Received: by trapdoor.merit.edu (Postfix, from userid
id 896EB91251; Tue, 10 Jul 2001 14:35:31 -0400 (EDT)
Received: from segue.merit.edu (segue.merit.edu
by trapdoor.merit.edu (Postfix) with ESMTP id
for <email@example.com>; Tue, 10 Jul 2001
14:35:29 -0400 (EDT)
Received: by segue.merit.edu (Postfix)
id 79E335DE1A; Tue, 10 Jul 2001 14:36:58 -0400 (EDT)
Received: from bond.interpacket.net
by segue.merit.edu (Postfix) with SMTP id ECF9A5DDD8
for <firstname.lastname@example.org>; Tue, 10 Jul 2001 14:36:57
Received: (qmail 31855 invoked from network); 10 Jul
2001 18:35:43 -0000
Received: from mrbig.la.interpacket.net (192.168.6.5)
by bond.la.interpacket.net with SMTP; 10 Jul 2001
Received: from [192.168.4.53]
(zombie.la.interpacket.net [192.168.4.53]) by
mrbig.la.interpacket.net with SMTP (Microsoft Exchange
Internet Mail Service Version 5.5.2653.13)
id N6TNP8LB; Tue, 10 Jul 2001 11:39:32 -0700
Date: Tue, 10 Jul 2001 11:35:52 -0700
From: Mikey Wilsker <email@example.com>
Subject: OT: The End of Empire
Content-Type: text/plain; charset="us-ascii" ;
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