Re: New Trojan

From: Russell Fulton (r.fulton_at_auckland.ac.nz)
Date: 10/29/03

  • Next message: stefmit: "Re: Large increase in port 27347" 
    To: Damian Gerow <damian@sentex.net>
Date: Wed, 29 Oct 2003 16:33:41 +1300

    On Wed, 2003-10-29 at 07:17, Damian Gerow wrote:

    > I also just completed a UDP port scan of the infect host, which was
    > completely useless. My screen buffer only goes back so far, but every port
    > from 64367 and up is marked as 'open'. :(

    I have little faith in UDP scans because lack of response is taken as
    meaning the port is open. UDP scanning works on the principle that
    closed port should send back a ICMP port unreachable. If the port is
    filtered or packet dropped anywhere along the path or the machine does
    not respond with the expected unreachable or the unreachable gets
    filtered or dropped then the port will show as open.

    You probably know all this but, just in case... 

    -- 
Russell Fulton, Network Security Officer, The University of Auckland,
New Zealand.
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