Philip is right.  One to Many NAT is just for incoming on your internet ports.  An example of where you'd use it is if you wanted to have incoming traffic on different ports going to different servers.     For example 1:Many NAT Public IP 8.8.8.8 (this would be one of your public IPs) TCP 8000 to LAN IP 10.0.0.1 TCP 61500 to LAN IP 10.0.0.2   So if someone goes to 8.8.8.8:8000 they land at your 10.0.0.1 server port 8000 or whatever you map it to if someone goes to 8.8.8.8:61500 they land at your 10.0.0.2 server port 61500 or whatever you map it to.   ... View more