![snort logo](/images/snort-logo.png)
Snort mailing list archives
syn/fin and src port
From: "skop d'skop" <skop () visto com>
Date: Wed, 06 Jun 2001 19:08:13 -0700
hi all, wonder what this pattern is all about - taken from snort_portscan.log May 30 04:38:52 a.b.c.d:21 -> w.x.y.z:21 SYNFIN ******SF May 30 04:38:53 a.b.c.d:19689 -> w.x.y.z:21 SYN ******S* May 30 04:38:52 a.b.c.d:21 -> w.x.y.z:21 SYNFIN ******SF May 30 04:38:52 a.b.c.d:19687 -> w.x.y.z:21 SYN ******S* 1. it try to connect to w.x.y.z with synfin flag - maybe to avoid detection -but it detected by ids ? 2. its source port is 21 (<1024) which require root service - but how would u do scanning from port < 1024. i have tried with hping and nmap - doesn't work :( 3. second line then only it send syn flag - to start connection. so the purpose for sending synfin is to see weather the port is alive or not - is it ? thanks -i'm just a beginner- -skop ___________________________________________________________________________ Visit http://www.visto.com/info, your free web-based communications center. Visto.com. Life on the Dot. _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: http://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users
Current thread:
- syn/fin and src port skop d'skop (Jun 06)
- Re: syn/fin and src port Aaron (Jun 06)