Solved

Spoofed source address in wg firewall log

Posted on 2009-06-30
4
480 Views
Last Modified: 2013-11-16
Scenario same machine with WG Fb100 mgnt console one nic card with static IP:
nbtstat -a "servername" shows a node using the spoofed address 169.254.65.133 for "lan address 2", which doesnt' exist when you look under nw connections.  Both the real IP and spoofed address info displayed reflect the same IP address.  The machine on ly has one nic card.  RRAS and any other service I can think of that could relate to this disabled/not running.  Machine is server 2k2.   WG example below of logged spoofed.  I'm not sure how else to troublehsoot this.  THe machine is running acronis mgmt console as well as vmware converter and a smtp service for avya unified messging sytem.  The entries were numerous in the firewall this a.m. and our internet slows down, but all the sudden stopped.   Any suggestion of where else on board to post this question, also, plese let me know.  
spoofed.bmp
0
Comment
Question by:dee30
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
4 Comments
 
LVL 23

Expert Comment

by:Mohamed Osama
ID: 24746870
Are you sure this is not related to perhaps VMWARE virtual NAT / NIC settings ?
 
0
 
LVL 12

Expert Comment

by:jahboite
ID: 24753443
On the one hand, I would say that the source IP address looks like an APIPA configured address and would hint that the machine in question was unable to contact your DHCP server for a proper IP address (read more about APIPA at http://blogs.technet.com/networking/archive/2009/01/29/dhcp-client-behavior.aspx).

On the other hand, it seems mighty suspicious that the source would contact hosts on the internet via UDP 137 (NETBIOS Name Service)
0
 
LVL 9

Accepted Solution

by:
jfer0x01 earned 500 total points
ID: 24800151
not necessarily,

enabling TCP/IP over Netbios can also cause this, it's essential for Exchange and other MSost apps in some cases

the ip range is apipa

Jfer
0
 

Author Closing Comment

by:dee30
ID: 31598386
You're right about the netbios explanation on the UDP 137 port, while I haven't completely resolved the issue(s), so far.  Accepting and closing question, though.  Thx
0

Featured Post

Enroll in May's Course of the Month

May’s Course of the Month is now available! Experts Exchange’s Premium Members and Team Accounts have access to a complimentary course each month as part of their membership—an extra way to increase training and boost professional development.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Cisco asax sourcefire Ips 7 73
Virus On motherboard 6 130
Google Play app store not being blocked from smartphones 4 83
Help review broadcast on systems patching directive 6 98
Transferring data across the virtual world became simpler but protecting it is becoming a real security challenge.  How to approach cyber security  in today's business world!
If you're not part of the solution, you're part of the problem.   Tips on how to secure IoT devices, even the dumbest ones, so they can't be used as part of a DDoS botnet.  Use PRTG Network Monitor as one of the building blocks, to detect unusual…
Finds all prime numbers in a range requested and places them in a public primes() array. I've demostrated a template size of 30 (2 * 3 * 5) but larger templates can be built such 210  (2 * 3 * 5 * 7) or 2310  (2 * 3 * 5 * 7 * 11). The larger templa…
Are you ready to implement Active Directory best practices without reading 300+ pages? You're in luck. In this webinar hosted by Skyport Systems, you gain insight into Microsoft's latest comprehensive guide, with tips on the best and easiest way…

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question