Snort mailing list archives
Re: not logging portscans
From: Matt Kettler <mkettler () evi-inc com>
Date: Thu, 23 May 2002 21:39:57 -0400
Is your snort sensor attached to a network switch? what about a "dual speed auto switching hub"?
Snort can only see what goes by the ethernet it's attached to, and network switches only send traffic to the machines that need it. (ie: you'll see broadcasts, like ARPs from other machines, but no traffic sent to them alone). Internally auto switching hubs are more like a 10mbit hub and a 100mbit hub with a 2 port switch between them, so the 10mbit ports don't see traffic exclusively between two 100mbit ports, or vice versa.
You can tinker around a bit using tcpdump to see what's going by your ethernet port to see if it's an ethernet level problem, or a snort configuration problem.
At 01:47 PM 5/23/2002 +0100, Fage Martin wrote:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello Snort doesnt seem to detect any portscanning activity except when directly scanning snort machine! Any ideas? Thanks -----BEGIN PGP SIGNATURE----- Version: PGPfreeware 6.5.8 for non-commercial use <http://www.pgp.com> iQA/AwUBPOzk5oM7OF/nbs7zEQJnyACfbuucvZZ8WdxKJjSYlX0lZwjhe4MAoPtF khS+ePmh0zVGPxBG/3nmFbbE =HX1T -----END PGP SIGNATURE----- _______________________________________________________________ Don't miss the 2002 Sprint PCS Application Developer's Conference August 25-28 in Las Vegas -- http://devcon.sprintpcs.com/adp/index.cfm _______________________________________________ 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
_______________________________________________________________ Don't miss the 2002 Sprint PCS Application Developer's Conference August 25-28 in Las Vegas -- http://devcon.sprintpcs.com/adp/index.cfm _______________________________________________ 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
Current thread:
- not logging portscans Fage Martin (May 23)
- Re: not logging portscans Matt Kettler (May 23)
- <Possible follow-ups>
- RE: not logging portscans McCammon, Keith (May 23)