Eric, Good point that nobody else mentioned. Since the network number is freshly allocated, I believe (not recycled), I'm pretty sure that this is not the case *this* time. Anyway, I'm filing away all of the interesting responses. The port 137/UDP traffic may indeed be harmless. Some other packets I'm now seeing (port 139/TCP, 1-2 packets, from different source IPs) seem to indicate this may be more than Micro$oft misconfiguration . . . On Tue, 6 Jan 1998, Eric Germann wrote:
The other less paranoid scenario is they were renumbered and didn't update some server mappings in WINS or LMHOSTS and you were lucky enough to get their old space.
Eric
At 10:52 AM 1/6/98 -0800, Dalvenjah FoxFire wrote:
C. Jon Larsen put this into my mailbox:
Is there any *valid* reason to see UDP traffic directed at a unix box's port 137 coming from IP sources across the internet ? The unix servers in question are most definitely *not* running samba, and there is absolutely no NT anywhere on this customer's network (that is seeing the incoming UDP traffic directed at an IP destination address on port 137). (A couple of 95 boxes scattered across an Ethernet comprise the Micro$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 ?
No. Doubtless some idiot thinks everybody runs WinDoze and is trying to winnuke you, especially if several boxes get hit one after the other. E-mail the contacts of the source address and ask that the account be removed; chances are the person wasn't clueful enough to spoof the source address.
-dalvenjah
-- Dalvenjah FoxFire (aka Sven Nielsen) "Hath not a dude eyes? If you prick us, Founder, the DALnet IRC Network do we not get bummed? If we eat bad guacamole, do we not blow chunks?" e-mail: dalvenjah@dal.net - Keanu Reeves as Shylock in The Critic whois: SN90 WWW: http://www.dal.net/~dalvenjah/
============================================================================ ==== Eric Germann Computer and Communications Technologies ekgermann@cctec.com Van Wert, OH 45891 Phone: 419 968 2640 http://www.cctec.com Fax: 419 968 2641
Network Design, Connectivity & System Integration Services A Microsoft Solution Provider