I have an Asa5520 that drops an active connection (Exceed Win-Unix) approximately every two hours. The end user has to manually bring up the Exceed session after every drop. This is the only connection thru the Asa without any idle time (idle 0:00:00 bytes 4665563 flags UIOB). I don't see anything in the buffered log, level warnings. Thanks.
I have this problem too.