Hello. I am transitioning to a new server. It has a hardware firewall (external unit). The OLD server just had a software firewall running in Windows.
The OLD server had an IP used solely for SM. This was an external IP (could be seen by world). All worked fine.
NEW server cannot see EXternal IPs, only INternal NAT addresses. Each external IP available to the box is mapped/translated to a corresponding internal IP.
For example, the external 18.104.22.168 is mapped to the internal 10.10.10.10. In SM (v11), I am unable to enter the IP addresses in the "bindings" area. Instead, I can only choose from the IPs SM sees on the box; these are all INternal.
I would prefer to use an IP other than the box's primary one, making it solely used for SM (as I believe I have read is best practice for email server on same box as website). But... I mostly need it to work so I will put it on ANY IP the box has, EX/INternal.
I tried setting up the protocols on this internal IP. In "hostnames" area, I was able to enter an IP and I entered the EXternal one.
This approach is not working and I've no idea what is correct. Anyone have insight on this they could share?
Thanks for any assistance.