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Re: UDP port 137 Question
From: Henry Linneweh <linneweh () concentric net>
Date: Tue, 06 Jan 1998 23:15:21 -0800

port 139 is the OOB bug known as winnuke attack and can be patched, variations
come through other ports as directed by Linux boxes at win95 users or MS users

Henry R. Linneweh

C. Jon Larsen wrote:

Is there any *valid* reason to see UDP traffic directed at a unix box's
port 137 coming from IP sources across the internet ? The unix servers in
question are most definitely *not* running samba, and there is absolutely
no NT anywhere on this customer's network (that is seeing the incoming UDP
traffic directed at an IP destination address on port 137). (A couple
of 95 boxes scattered across an Ethernet comprise the Micro$oft part of
the network). None of the 95 boxen are running any file or print serving
(sharing) resources.

I can't think of any valid reason to see this traffic, personally. Anybody
out there that can present a scenario where I would expect to see these
UDP packets coming back in ?

netbios-ns      137/tcp         nbns
netbios-ns      137/udp         nbns
netbios-dgm     138/tcp         nbdgm
netbios-dgm     138/udp         nbdgm
netbios-ssn     139/tcp         nbssn

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
C. Jon Larsen             Email: jlarsen () ford ajtech com
Systems Engineer          Voice: +1.804.353.2800 x118
A&J Technologies          http://www.ajtech.com

PGP Key fingerprint: 8A 62 4C 6E 1E 3C CD 63  B3 16 1A 1B D2 61 EE 97
PGP Public key available at: http://ford.ajtech.com/CJL.txt
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-



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