Preserving Client IP address for SMTP traffic
I know this topic has been discussed in the forums multiple times, but I never found implementation details which dont' require iRules or putting the BigIP in bridging mode.
I would like to be able to load balance SMTP servers with LTM, and have the SMTP servers see the original IP address of the sender.
We have already changed the default gateway of the SMTP servers to the floating IP of the F5 units. I have SNAT Pool set to None, and Address Translation and Port Translation enabled.
When I connect with telnet to port 25 on the virtual server, the connection is quickly closed before I can even finish HELO.
Can someone share implementation details?