I have a router I have set up with a static IP and several alias static IP addresses in the usable range provided by the ISP (Comcast). On one of alias IP's, I forwarded port 25 to my Exchange server. I would like to set up a reverse DNS record (mail.domain.com) and tie it to that alias IP.
My question is....can I set up a reverse dns record to an alias IP on a router? When I do go to www.whatismyip.com
, it shows the gateway (primary IP) address so my concern is that mail sent from that server would always show as sending from that primary gateway IP address and the reverse DNS record would not help. Any thoughts?