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I have port forwarding "25" going to a single device with 1 IP NAT to that internal server
when I NAT my 2nd IP that same port "25" shows taken but this is a 2 IP that should also have port "25".

im trying to have two "open, all ports" to each domain with it own dedicated IP.
Wednesday, May 13 2020, 11:35 PM
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    Thursday, May 14 2020, 07:46 AM - #Permalink
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    I am unclear on your set up. Do you have MultiWAN with more than one external NIC, or multiple IP's on the same interface?

    Port forwarding will forward traffic to all interface base IP's to a single LAN IP.

    1-to-1 NAT allows you to use additional IP's on a NIC and forward them to different machines, either by port or all traffic.

    If you are forwarding the IP the NIC is configured with, use port forwarding. If you are using an IP address the NIC is not configured with, use 1-to-1 NAT. You should not use port forwarding and 1-to-1 NAT at the same time to the same LAN IP.

    Are your "open all ports" to different machines on your LAN. That is 1-to-1 NAT.
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