Snort mailing list archives
Re: Query on ClamAV preprocessor in snort-2.3.3
From: Will Metcalf <william.metcalf () gmail com>
Date: Sun, 15 May 2005 23:10:23 -0500
ok, so just initialize clamav after "preprocessor stream4_reassemble" in your snort.conf and viola, you are scanning the reassembled streams. Regards, Will On 5/15/05, Jason Haar <Jason.Haar () trimble co nz> wrote:
I am now successfully using the ClamAV plugin, but there's one thing I've noticed. It appears that it works by dumping the data component of *single packets* out to disk and then runs clamav over it (not the binary - the library API of course). But it does look like single packets. This must mean there are tonnes of ClamAV signatures that don't get a chance to trigger. Assuming I am correct, is there a reason for this? I mean, snort itself "merges" multiple packets into streams, so why can't ClamAV code be called after the stream has been aggregated? And yes, I know snort doesn't reconstitute entire TCP conversations - but even 10 packets of a stream would be better than one? PS: yes - you do need bigger CPUs. I have 16 systems in place and all ran below 0.6 load average. Now with ClamAV the busiest are running at 1.5 - i.e. I'll need to upgrade to faster hardware if I expect to really use this. -- Cheers Jason Haar Information Security Manager, Trimble Navigation Ltd. Phone: +64 3 9635 377 Fax: +64 3 9635 417 PGP Fingerprint: 7A2E 0407 C9A6 CAF6 2B9F 8422 C063 5EBB FE1D 66D1 ------------------------------------------------------- This SF.Net email is sponsored by Oracle Space Sweepstakes Want to be the first software developer in space? Enter now for the Oracle Space Sweepstakes! http://ads.osdn.com/?ad_id=7393&alloc_id=16281&op=click _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users
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Current thread:
- Query on ClamAV preprocessor in snort-2.3.3 Jason Haar (May 15)
- Re: Query on ClamAV preprocessor in snort-2.3.3 Will Metcalf (May 15)
- Re: Query on ClamAV preprocessor in snort-2.3.3 Jason Haar (May 15)
- Re: Query on ClamAV preprocessor in snort-2.3.3 Will Metcalf (May 15)