While looking throgh the logs I noticed that I repeatedly see a syslog informational entry that reads "Dropped a TCP packet ith no matching session; flags=0x4<RST>". The thing is that there seems to be a matching session to me. We are currently trying to troubleshoot a communications problem and think this might be the problem. Can anyone help me understand why exactly this happening and how I can disable this feature or resolve it? I am currently using Sidewinder 8.3.1 on a S4016.
The example message that you pasted has RST flag set. My guess (from what I have seen in the past) is that the client or server sent two reset packets. The first reset closed out the session and the second one was audited by the firewall as a packet with no matching session. My recommendatino is to do some tcpdumps to see exactly what is happening.