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| Subject: | Re: [Snort-sigs] Matching question |
|---|---|
| Date: | Tue, 19 Jul 2005 08:51:01 -0500 |
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Thanks, that's what I needed! bmc@snort.org wrote:
To match the first 2 bytes, skip one byte, then match 4 bytes, you can
do that in to different ways.
Normally:
content:"|FF 51|"; depth:2; content:"|01 00 00 00|"; offset:4;
depth:4;
Via relative:
content:"|FF 51|"; depth:2; content:"|01 00 00 00|"; distance:1;
within:4;
Its really up to you which you choose. I prefer relative, but mostly
due to having to deal layers upon layers of protocols. If the rules
are relative, than I only have to maintain one set of distances.
Brian
-----BEGIN PGP SIGNATURE----- Version: GnuPG v1.9.15 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFC3QVFfqSf2EkP4p4RAlqkAJ9XR8vy6ayltd+dhykx8Dy2JbD4tgCfalRl 333moFig4wRzIL5ORkcbH0E= =HCtq -----END PGP SIGNATURE----- ------------------------------------------------------- SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. Find simple to follow Roadmaps, straightforward articles, informative Webcasts and more! Get everything you need to get up to speed, fast. http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click _______________________________________________ Snort-sigs mailing list Snort-sigs@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/snort-sigs
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