North American Network Operators Group
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Re: New DoS attack affecting small NAT devices?

  • From: mike harrison
  • Date: Thu Apr 18 21:41:28 2002 
> Starting Tuesday night, we started getting complaints from customers in a 
> specific net block of our network, all of whom were running small 
> "personal" firewalls (Netgear, linksys etc) about:

Someone on that network is scanning/flooding it hard... probably from
a hacked box spoofing IP's. Last one I had was a linux boxen
with a 'udp.pl' running from a pseudo-root account. As it was
not actually making connections, many of the traffic/monitoring tools
had a hard time identifying it. We found it using ntop (ntop.org)
and the packet stats on the ethernet switches.