Foreign Attacks (was Re: [Snort-users] Firing off Abuse email based on Snort Traffic)

bmcdowell at ...7861... bmcdowell at ...7861...
Fri May 30 06:57:09 EDT 2003

I too have noticed that most of the high-scoring offenders appear to be
Asian.  (Of course, there's no way to know that those Asian haven't been
somehow hijacked, but that's another topic...)  Since my firm provides a
mostly-domestic product, I wonder if it wouldn't be best just to black
hole that whole continent.  Or, for that matter, everything but North
America.  It seems extreme, but since it shouldn't necessarily cost me
any business, I haven't totally dismissed it yet.

As I see it, there is no good reason to pursue (on your own) an attack
from outside your native land.  I have never imagined myself working
hand-in-hand with, say, Korean law enforcement to track down a hacker.

Has anyone else on the list had any positive experiences with foreign
law enforcement?  Does anyone take a different stance toward foreign

Just curious...

-----Original Message-----
From: snort-users-admin at
[mailto:snort-users-admin at]On Behalf Of Skip Carter
Sent: Thursday, May 29, 2003 8:45 PM
To: Matt Howell
Cc: snort-users at
Subject: Re: [Snort-users] Firing off Abuse email based on Snort Traffic

> How do other administrators handle genuine attacks and Portscans from
> International sources?

  Persistant  portscans we generally respond to by black holing the
  or network at the border routers or firewalls.  Other attacks tend to
  more attention; it helps if you can engage the assistance of security
  admins from other Internet locations (we once got the assistance of
  US Air Force when one of our investigations and theirs inadvertently
  paths; they were a great help in shutting down some Korean attacks!).

  BTW: is anybody else seeing slow scans (3 or 4 addresses per day)
  coming from Cuba ?



 Dr. Everett (Skip) Carter      Phone: 831-641-0645 FAX:  831-641-0647
 Taygeta Scientific Inc.        INTERNET: skip at ...1552...
 1340 Munras Ave., Suite 314    WWW:
 Monterey, CA. 93940            

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