I’m trying to access a server on my LAN via its public IP address. External clients can connect just fine, but I’m unable to do so from within the LAN. There is a separate rule in the NAT settings of my gateway (which translates subnet addresses to the public interface IP, but is otherwise identical), but it doesn’t appear to be working properly.How would I correctly set things up to access a local resource via a public IP address?

Source: How to implement Nat loopback/reflection? – Server Fault