Solved

Spoofed source address in wg firewall log

Posted on 2009-06-30
4
483 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

IoT Devices - Fast, Cheap or Secure…Pick Two

The IoT market is growing at a rapid pace and manufacturers are under pressure to quickly provide new products. Can you be sure that your devices do what they're supposed to do, while still being secure?

Question has a verified solution.

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

SHARE your personal details only on a NEED to basis. Take CHARGE and SECURE your IDENTITY. How do I then PROTECT myself and stay in charge of my own Personal details (and) - MY own WAY...
You cannot be 100% sure that you can protect your organization against crypto ransomware but you can lower down the risk and impact of the infection.
In this brief tutorial Pawel from AdRem Software explains how you can quickly find out which services are running on your network, or what are the IP addresses of servers responsible for each service. Software used is freeware NetCrunch Tools (https…
Sometimes it takes a new vantage point, apart from our everyday security practices, to truly see our Active Directory (AD) vulnerabilities. We get used to implementing the same techniques and checking the same areas for a breach. This pattern can re…

630 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