Thanks, I read it in the past, I added a note about it and mentioned that one can use sl_send_reply("200", "OK") config for a similar solution.

Cheers,
Daniel

On 11/18/10 3:44 PM, Mark R wrote:
This might also be of use if bandwidth is an issue:

http://jcs.org/notaweblog/2010/04/11/properly_stopping_a_sip_flood/

Rgds,

Mark

On Thu, Nov 18, 2010 at 1:57 PM, marius zbihlei <marius.zbihlei@1and1.ro> wrote:
On 11/18/2010 03:59 PM, Fred Posner wrote:
On Nov 18, 2010, at 8:49 AM, marius zbihlei wrote:

 
On 11/18/2010 01:58 PM, Daniel-Constantin Mierla wrote:
   
Hello,

during the testing period of Kamailio 3.1.0, while running it at
voipuser.org, I had the chance to watch live and analyze a SIP scanning
attack. Yesterday I noticed another one by looking at Siremis 2.0
charts, therefore I wrote an article with some hints about what you can
use to protect your SIP services within Kamailio configuration file.

You can read it at:
   * http://asipto.com/u/i

Hope is going to be useful for many of you!

Cheers,
Daniel


     
Hello Daniel,

Nice read, thanks for sharing. This "friendly-scanner" messages has really gotten out of hand lately. FYI, they are generated by a python suite called SIPVicious (ha ha nice pun)(http://code.google.com/p/sipvicious/) . More on this http://blog.sipvicious.org/. The suite was developed (really really extended the sense of the word "developed" here - as the scripts are really basic) by a security company who trails over Europe giving lectures on Voip security. :)

Cheers,
Marius
   
SIP Vicious does have a kill command... I've tried launching that on detection with mixed results. Triggering it from a hash count might prove better.


 
The kill command (actually a bug that caused a Python exception to be raised) was fixed in a later commit :)

Marius

With best regards,

Fred
http://qxork.com







 


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Daniel-Constantin Mierla
Kamailio (OpenSER) Advanced Trainings
Nov 22-25, 2010, Berlin, Germany
Jan 24-26, 2011, Irvine, CA, USA
http://www.asipto.com