[Snort-users] How rules fire question.

[AT&T.Net]

Hi,
My snort is giving me an alert for example. Snort Alert [1:24889:0]. When I look at my snort.rules file there is rev 1 but not a rev 0. If the last number is referencing the rev, why would it have fired on a non existing rev? I've searched my old archived rules on the server and other rules and don't have that SID with a rev 0.

Thanks,
Mike

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[Joel Esler]

On May 6, 2013, at 10:59 AM, "AT&T.Net" <cop...@att.net> wrote:

Hi, 
      My snort is giving me an alert for example. Snort Alert [1:24889:0]. When I look at my snort.rules file there is rev 1 but not a rev 0. If the last number is referencing the rev, why would it have fired on a non existing rev?  I've searched my old archived rules on the server and other rules and don't have that SID with a rev 0. 

That rule is at rev:1.  We start all rules at Rev 1.  

So, I am thinking two things

#1 -- You aren't using pulledpork to manage your downloads (which as part of it's download and managing process, it creates the sid-msg.map for you)

#2 -- Your barnyard2 instance isn't reading the sid-msg.map file that pulledpork generates.

--
Joel Esler
Senior Research Engineer, VRT
OpenSource Community Manager
Sourcefire

[AT&T.Net]

Thank Joe,

     In looking how this box was set up, pulled pork is being used on a central server but one of the scripts being used to push the rules and that file to all the sensors was pulling from the wrong location and therefore the correct Sid file was not being pushed. 

Thanks,

Mike

Sent from mobile device via my thumbs. 

[Joel Esler]

Good to hear you got it squared away.