Snort mailing list archives
Re: UDP Portscans Are Not Capture
From: Erek Adams <erek () theadamsfamily net>
Date: Mon, 30 Sep 2002 09:11:45 -0700 (PDT)
On Mon, 30 Sep 2002, Grigoris Vidakis wrote:
i run snort Version 1.8.3 (Build 88) in the linux 7.3 (2.4.18-3) and it capture and aler me for upd portscans BUT in the same box which the same kernel and libpcap the snort Version 1.8.7 (Build 128) does not capture them..
Actually, it's not anything to do with snort. It's strictly the way that the portscan preprocessor works. The spp_portscan generates one alert when a scan starts, one alert during the scan, and one alert at the end of the scan. These alerts don't have any packets associated with them. They will _never_ be in the pcap file. The _only_ way snort will log a packet that was part of a portscan is if the packet matches a rule (SYN-FIN Scan for example). If it matches a rule, then a copy of the packet will be saved. If there is no rule, there won't be a matching packet log. I'm not sure if I'm stating it better here or in the other second paragraph of the previous email. Read both and see if it helps! Cheers! ----- Erek Adams Nifty-Type-Guy TheAdamsFamily.Net ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ 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:
- UDP Portscans Are Not Capture Grigoris Vidakis (Sep 30)
- Re: UDP Portscans Are Not Capture Erek Adams (Sep 30)
- Re: UDP Portscans Are Not Capture Grigoris Vidakis (Sep 30)
- Re: UDP Portscans Are Not Capture Erek Adams (Sep 30)
- Re: UDP Portscans Are Not Capture James Hoagland (Sep 30)
- Re: UDP Portscans Are Not Capture Grigoris Vidakis (Sep 30)
- <Possible follow-ups>
- RE: UDP Portscans Are Not Capture McClure Gammon (Sep 30)
- Re: UDP Portscans Are Not Capture Erek Adams (Sep 30)