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snort-users: Re: [Snort-users] inverse snort rule

Re: [Snort-users] inverse snort rule

From: Jason Wallace <jason.r.wallace_at_nospam>
Date: Fri May 22 2009 - 12:10:39 GMT
To: Snort <snort-users@lists.sourceforge.net>


I think if you made A, B, C, and D pass rules then configured the snort alert order so that pass rules are check first, and then had a rule F that logged everything that might give you what you want.

Wally

On Fri, May 22, 2009 at 3:27 AM, yavuz gokirmak <ygokirmak@gmail.com> wrote:
> Hi all,
>
> I am a new user of snort, I have a question about snort usage.
>
> I have a file of pcap data ( read vie tcpdump -r)
>
> Assume we have some rules A,B,C,D and E.
>
> I want to log unrecognized packets, I mean,
> Packets which matches none of the A,B,C,D,E rules...
>
> is it possible,
>
> Can I take the inverse of the whole rule to create new rule like " !A and !B
> and !C and !D and !E" ?
>
> thanks in advance,
>
> yavuz...
>
>
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