Connect to WAN IP from within LAN ?

[lewtaedoung17]

Before switching from a plain home router to opnsense, I was able to connect to certain local services through my WAN IP. Now opnsense seems to be blocking that, which I'm sure is a good default. But now I'm wondering a couple things.

What firewall rule(s) would I put in place to get that functionality back? Suppose I'm going to sit at a LAN machine and perform a connection on a dynamic DNS hostname, which will map to the WAN IP.
Would this be considered a bad idea? A security faux paus? I admit I don't need to do this. I just sometimes check functionality from inside the LAN, but I could probably just put my laptop on a mobile hotspot and check that way instead.
pg slotฝากถอนออโต้

[Demusman]

Look up NAT reflection.