Snort mailing list archives
how to detect failing open connection attempts
From: jrhendri () maine rr com
Date: Mon, 15 Nov 2004 11:28:24 -0500
Hi, It seems like something that could be done, but I'm not real sure how. What I want is to do alerting (or logging) of connection attempts that receive an inbound SYN (to a specific host or network) but no SYN/ACK is ever sent back. I simply don't know enough about how snort handles flow or connection "tables" to see an easy way to do this. I've even thought about a *very* crude combination of tcpdump and a perl script to enter SYNs into a connection table, then delete them after a SYN/ACK is seen, and alerting on ones that never complete using alarm(), but I know there must be a better way... Any ideas? Thanks! Jim Hendrick ------------------------------------------------------- This SF.Net email is sponsored by: InterSystems CACHE FREE OODBMS DOWNLOAD - A multidimensional database that combines robust object and relational technologies, making it a perfect match for Java, C++,COM, XML, ODBC and JDBC. www.intersystems.com/match8 _______________________________________________ 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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- how to detect failing open connection attempts jrhendri (Nov 15)