Solved

F-Secure reports its receiving tcp 139 with source and destination address  equal vlan interface brodacast address. Any ideas of what can causing this?

Posted on 2008-10-06
1
1,187 Views
Last Modified: 2009-12-16
We quite often receive alarms from F-Secure FW saying its blocking malicious traffic on tcp 137 from source address VLAN/subnet broadcast address. (10.140.XXX.255)  as both source and destination address.
Does anybody know what can be the reason for this and how to find the source?
0
Comment
Question by:Ziggino
1 Comment
 
LVL 32

Accepted Solution

by:
harbor235 earned 500 total points
Comment Utility


Odd, could be an attack, track down the source mac-address to see what switch port this system is connected to. i would have a clser look at this system


harbor235 ;}
0

Featured Post

Better Security Awareness With Threat Intelligence

See how one of the leading financial services organizations uses Recorded Future as part of a holistic threat intelligence program to promote security awareness and proactively and efficiently identify threats.

Join & Write a Comment

Suggested Solutions

The worst thing when starting a new job is when the previous Network Administrator left behind no documentation. How do you get into the devices? If you've been in this situation or just accidently mistyped your password, this article will hopefully…
As dyndns has reduced the capabilities of the free service, I looked around for other free providers of Dynamic DNS service. After testing several I decided to move my DNS hosting to Hurricane Electric as then domains that require dynamic hostnam…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're looking for how to monitor bandwidth using netflow or packet s…

743 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

Need Help in Real-Time?

Connect with top rated Experts

8 Experts available now in Live!

Get 1:1 Help Now