Security Basics mailing list archives

RE: Strange pings from 127.0.0.1


From: "David Gillett" <gillettdavid () fhda edu>
Date: Thu, 24 Jun 2004 08:26:12 -0700

Solution: track back the packets by MAC address to find the infected
machine. Turn off NS resolution of windowsupdate.com to 127.0.0.1.

  Note that the MAC address only gives you the next hop.  The infected
machine may be on some remote network, 20 or more hops away.

  Real Solution:  Block packets sourced from 127.0.0.1 at your border.
Drop and ignore them if the source port is 80.  Invoke curses from
deity of choice on admins/owners of systems that have somehow STILL
missed both the security fix and the antivirus updates to deal with 
blaster....

David Gillett



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