Snort mailing list archives

Re: Logging packet contents in alerts.


From: "Matthew Collins" <Matthew.Collins () northernregistrars co uk>
Date: Thu, 07 Jun 2001 08:53:54 +0100

That's what I do at the moment. That's what I'm trying to avoid.

At the moment, snort logs to binary files, I use the -b option. To get the packet contents I ssh to the snort box, send 
snort a HUP so it closes the file & opens a new one. I then scp this to my machine, run snort on my machine against the 
binary file to extract the packet contents and then I examine the packet.
This takes ~ 15 minutes to do, for every false alarm. If it is towards the end of the day, the binary file can be > 
400MB. If I could see the packet contents in the alert, It would take me about 10 seconds to look at the packet and see 
if it's a false alarm or not.

That's what I'm asking, is there any way to get snort to log packet contents in the alert?

Colin Wu <wucolin () mcmaster ca> 06/06/01 17:35:14 >>>
Why not build tcpdump on your non-snort box and use 'tcpdump -X -r snort.log.file' to extract the contents.  I don't 
see why you need to restart snort to get the data dumped since you're logging application data to tcpdump format file 
anyway.  Am I missing something?  If you just want to checkpoint the snort logs you can send it
a HUP signal.  If you started snort with a -b flag, and using the default log file name snort will create a new binary 
log file with a different timestamp.



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