I'm trying to configure a asa 5510 to forward the smtp port to a host on my network. If the destination host is in the same subnet like the asa and the gateway of the host is the inside ip of the asa, all works fine. Now my question, is it posible to redirect the port to a host on an other subnet, where the destination host has not the asa as gateway? On my first try I got a SYN Timeout error. Is it true, that the tcp handshake only works if the destination host has the asa as gateway?
Thanks for your help!