Security Incidents mailing list archives
Odd traffic again...... internal --> 100.100.100.1 (137-udp)
From: loki74 <loki74 () gmail com>
Date: Thu, 24 Aug 2006 10:42:28 -0400
Hello, I have posted before about a windows box that sent traffic to different ip's to port 137, and never really got a solution to it. We have sinced wiped that box. Now we have a new box, built in a DMZ (Freshh install, all patches applied) and just connected it to the internal lan (behind fw). The box now sends UDP port 137 to 100.100.100.1. The permiter firewall blocks this, and that is where it was noticed. I have started logging on my firewall to find out who it was, and it is an internal box. Cisco ACL: Aug 24 12:28:42: %SEC-6-IPACCESSLOGP: list internal_out denied udp x.x.x.x(49375) -> 100.100.100.1(137), 5 packets Firewall Log: eth4c0:i[78]: 192.168.x.x -> 100.100.100.1 (UDP) len=78 id=13167 UDP: 137 -> 137 eth4c0:I[78]: 192.168.x.x -> 100.100.100.1 (UDP) len=78 id=13167 UDP: 137 -> 137 eth1c0:o[78]: 192.168.x.x -> 100.100.100.1 (UDP) len=78 id=13167 UDP: 137 -> 137 eth1c0:O[78]: 68.163.87.34 -> 100.100.100.1 (UDP) len=78 id=13167 UDP: 49902 -> 137 I am now capturing the traffic again, though there is nothing in it. Anyone ever seen this? T ------------------------------------------------------------------------------ This List Sponsored by: Black HatAttend the Black Hat Briefings & Training USA, July 29-August 3 in Las Vegas. World renowned security experts reveal tomorrow's threats today. Free of vendor pitches, the Briefings are designed to be pragmatic regardless of your security environment. Featuring 36 hands-on training courses and 10 conference tracks, networking opportunities with over 2,500 delegates from 40+ nations.
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Current thread:
- Odd traffic again...... internal --> 100.100.100.1 (137-udp) loki74 (Aug 24)
- Message not available
- Re: Odd traffic again...... internal --> 100.100.100.1 (137-udp) loki74 (Aug 24)
- Message not available
- Re: Odd traffic again...... internal --> 100.100.100.1 (137-udp) Tillmann Werner (Aug 24)
- <Possible follow-ups>
- Re: Re: Odd traffic again...... internal --> 100.100.100.1 (137-udp) i . m . crazy . frog (Aug 26)
- Re: Odd traffic again...... internal --> 100.100.100.1 (137-udp) Kevin Johnson (Aug 26)