mailing list archives
Re: The impending DDoS storm
From: Aaron Hopkins <lists () die net>
Date: Wed, 13 Aug 2003 13:46:38 -0700 (PDT)
has anyone tried tarpitting eg labrea to slow the worm?
I have been using my Linux kernel module ipt_TARPIT (included in the latest
netfilter.org patch-o-matic release) to do this for any IPs on my network
lacking a route, including outbound from my customers and inbound to my
unused address space.
While it is trying to scan routeless IPs, the tarpit slows it down to
scanning 20 IPs per ~9 minutes. (MSBlast has 20 connection slots, each
apparently timing out after ~9 minutes.) It normally appears to have a
several second connect timeout, so this slows it down by two orders of
magnitude with a similar drop in network traffic.
RE: The impending DDoS storm Eric Germann (Aug 13)
RE: The impending DDoS storm McBurnett, Jim (Aug 13)
RE: The impending DDoS storm Josh Fleishman (Aug 14)