Snort mailing list archives
Re: If this, but not this rules
From: Joel Esler <jesler () sourcefire com>
Date: Tue, 24 Nov 2009 21:52:31 -0600
On Tue, Nov 24, 2009 at 8:28 PM, Jesse Lands <cryptograffiti () gmail com>wrote:
Not sure if this even possible, but I want to alert on a specific file header flag, but not if it contains another flag. Is there a way to write an alert like that? Not asking for solutions. If there is a spot you can reference I can read it.
You mean to do a positive match, then a negative match? Yes. For instance, I want to look for packets with the word "joel" but not the word "esler" content:"joel"; content:!"esler"; -- Joel Esler | 302-223-5974 | gtalk: jesler () sourcefire com
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Current thread:
- If this, but not this rules Jesse Lands (Nov 24)
- Re: If this, but not this rules Joel Esler (Nov 24)
- Re: If this, but not this rules Nigel Houghton (Nov 25)