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Re: [Snort-sigs] [snort] why disabled "BAD TRAFFIC data in TCP SYN packe

from [Joel Esler] Network Security [Permanent Link]
Subject: Re: [Snort-sigs] [snort] why disabled "BAD TRAFFIC data in TCP SYN packet" rules on snort v2.3.3 (and before) ?
Date: Sun, 29 May 2005 09:56:22 -0500 
Remember when using pass rules, that you have to either specify the
"-o" at the command line, or use it as a "config" in your snort.conf. 
(See your snort users manual for furthre guidance)

J

On 5/19/05, Frank Knobbe <frank@knobbe.us> wrote:

On Fri, 2005-05-20 at 09:39 +1200, Russell Fulton wrote:

bad-traffic.rules:# alert tcp $EXTERNAL_NET any -> $HOME_NET any



Ah! I had not notice that it had been disable -- I was seeing some (what
I think were MTU discovery or similar services) sending blocks of NULLs
in SYN packets.

I'm guessing that these 'false +ves' out weighed the utility of the
rules.



I had added three rules to the Bleeding rules that can be used to pass
the false positives that are created by F5's load balancers. There might
still be use for the original Snort rule. Those rules are in
bleeding-scan.rules

Cheers,
Frank





BodyID:15744427.2.n.logpart (stored separately)





-- 
Joel Esler
BASE Project Lead
http://sourceforge.net/projects/secureideas


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