Snort mailing list archives
Re: "portscans" that only hit one host, one time?
From: "Vinay A. Mahadik" <VAMahadik () lbl gov>
Date: Fri, 09 Aug 2002 10:52:14 -0700
Yes, that's a sNOACK scan (it hasn't got a ACK flag set, and is not a series of other normal/scan types). Check the function 'CheckTCPFlags()' towards its end in spp_portscan.c. The flag combination is definitely weird and qualifies as a 'stealth' scan (stealth scans are not rate based, but per packet). Thanks, Vinay "McCammon, Keith" wrote:
[WARNING: Slightly off-topic]Aug 9 11:48:39 204.210.241.146:2051 -> xxx.yyy.zzz.66:443 NOACK *2U*PRS*I don't know much about spp_portscan internals, so I'm not sure why this was logged. However, I'd sure as hell qualify this as a portscan. This packet is definitely crafted to bypass a filter or elicit a response for fingerprinting or the like. ------------------------------------------------------- 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
-- Vinay A. Mahadik Summer Intern Computer Protection Program Lawrence Berkeley National Laboratory (510) 495 2618 ------------------------------------------------------- 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:
- "portscans" that only hit one host, one time? Cloppert, Michael (Aug 09)
- <Possible follow-ups>
- RE: "portscans" that only hit one host, one time? McCammon, Keith (Aug 09)
- Re: "portscans" that only hit one host, one time? Vinay A. Mahadik (Aug 09)