[62933] in North American Network Operators' Group
More ports to block
daemon@ATHENA.MIT.EDU (Sean Donelan)
Wed Sep 24 13:31:57 2003
Date: Wed, 24 Sep 2003 13:30:08 -0400 (EDT)
From: Sean Donelan <sean@donelan.com>
To: nanog@merit.edu
Errors-To: owner-nanog-outgoing@merit.edu
Pop-Up Scam Beats AOL Filter
http://www.wired.com/news/technology/0,1282,60564,00.html
AOL is not the only Internet service provider currently blocking all port
135 traffic. Many ISPs began filtering the port last month to mitigate the
spread of the MSBlaster computer worm, Baldwin said. While AOL also could
block UDP ports 1025-1029 to fully eliminate Messenger service spams, the
big ISP likely is worried about the potential "collateral damage" such a
move might cause to users with legitimate programs that require those port
addresses, he said.
