Solved

Macbook Pro being added to "shun" list in ASA Threat Detection

Posted on 2014-01-23
5
1,818 Views
Last Modified: 2014-02-10
This has happened a few times so I setup a syslog server to capture the debug output for this Macbook's wireless connection.  

After losing connectivity to the Internet, I looked at the logs and I'm seeing this:

2014-01-23 14:41:44      Local4.Warning      10.3.101.1      Jan 23 2014 14:41:44: %ASA-4-401002: Shun added: 10.3.101.191 0.0.0.0 0 0

And then a little further down:

2014-01-23 14:41:44      Local4.Warning      10.3.101.1      Jan 23 2014 14:41:44: %ASA-4-733102: Threat-detection adds host 10.3.101.191 to shun list

I've never had this issue before until now...I have another Mac on the network as well but haven't had any issues with it being added to the shun list.  Any help on this is appreciated.  Should I modify my threat detection parameters?  Any chance there may be some malicious software on the Mac OSX?
0
Comment
Question by:vianceadmin
  • 3
  • 2
5 Comments
 
LVL 25

Expert Comment

by:Cyclops3590
ID: 39804728
what is the output of

show threat-detection statistics host 10.3.101.191

if the IP of the host getting shunned changes, use that IP instead when running the command
0
 

Author Comment

by:vianceadmin
ID: 39804739
Right now, it shows:

XXXXXXX#  show threat-detection statistics host 10.3.101.191
Current monitored hosts:1194  Total not monitored hosts:18826
                          Average(eps)    Current(eps) Trigger      Total events
0
 
LVL 25

Expert Comment

by:Cyclops3590
ID: 39804760
what does
show shun
give

is it not being shunned anymore?
0
 

Author Comment

by:vianceadmin
ID: 39804808
Doesn't appear to be.  When I run the show shun command, it just takes me back to the #

Just curious why the ASA would think that the Mac is some type of threat?  Here are my threat detection commands:

threat-detection basic-threat
threat-detection scanning-threat shun except ip-address x.x.x.x 255.255.255.255 (network monitoring device)
threat-detection statistics
threat-detection statistics tcp-intercept rate-interval 30 burst-rate 400 average-rate 200
0
 
LVL 25

Accepted Solution

by:
Cyclops3590 earned 500 total points
ID: 39804829
take a look at cisco page on this:
http://www.cisco.com/en/US/products/ps6120/products_tech_note09186a0080bd3913.shtml

It shows all of the reason under a basic-threat configuration of what can trigger a threat to be detect and shun an ip.

once it happens again run that sh threat...   command and it should give you the reason so that you can start looking into what "bad" things the mac is doing.
0

Featured Post

Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

Join & Write a Comment

Deploystudio is a system which can be used to deploy OSX clients and servers within the small/medium or large business environments. The system is built onto of the OSX Server NetBoot system and uses images & workflows as its core assets. While work…
I recently attended Cisco Live! in Las Vegas, a conference that boasted over 28,000 techies in attendance, and a week of hands-on learning hosted by a solid partner with which Concerto goes to market.  Every year, Cisco displays cutting-edge technol…
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…
Polish reports in Access so they look terrific. Take yourself to another level. Equations, Back Color, Alternate Back Color. Write easy VBA Code. Tighten space to use less pages. Launch report from a menu, considering criteria only when it is filled…

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

10 Experts available now in Live!

Get 1:1 Help Now