Allowing Public IP to LAN server

[hvacguy (Shaun HVAC)]

best info I could find.

Best practice for NAT loopback/reflection/hairpinning behind router/fritzbox/etc?

I’m not sure, if I got it right… but I understand a NAT-loopback as a loopback in the same subnet. The special feature of a NAT loopback is (imho) that the source has to be altered. So it is a combination of at least three rules: a DNAT, a FORWARD and a SNAT/masquerading rule (all three chains are involved) Lets assume the following setup: router with red & green network red has public IP 11.22.33.44 green IP is 192.168.0.1 and subnet is 192.168.0.0/24 webserver in green network with IP 192.…