We have a working test configuration for Exchange 2010 sat behind a KEMP LM-3600 (HA Pair). This all works fine internally, but our Networks team are wanting to put this behind an Cisco ASA5550.
We have found that this configuration is not working and upon testing (the ASA5550 keeps a stateful table and tracks the tcp connection state) we find that the KEMP sends a TCP Reset (after the initial connection) back to the client and the ASA then removes the stateful entry.
Further traffic from the client to the KEMP is denied because the ASA sees this traffic trying to pass through a reset session.
A workaround exists in that we can turn stateful tcp tracking off but this is far from ideal.
Is there any configuration on the KEMP to resolve this?