ASASM, version 8.5. This common log message has a new reason for closing:
2011-11-09T07:54:53.933532-05:00 rich-870-fw.gatech.edu %ASA-6-302014: Teardown TCP connection 1139092077 for outside:130.207.172.30/47434 to inside:130.207.243.143/1521 duration 0:00:01 bytes 13683359 <snp_drop_none>
snl_drop_none
After that happens, the two machines in the conversation continue to talk, but the traffic is now denied as there is no longer a connection in the connection table.
I really would love to know what snl_drop_none means. I've also opened a TAC case, we'll see who answers first!
Thanks,
Graham