MAX BR1 Pro 5G with Opnsense and NPM

Hello all,
I am desperate and need your help.

Before I used the new router MAX BR1 Pro 5G, I had a Fritz!Box 6850 5G in my setup. And with the 6850 5G everything had worked so far. Now that I have switched to the MAX BR1 Pro 5G, I have enormous challenges with my web servers behind it.

I have set the port forwarding to the Opnsense LAN interface in the web interface of the BR1 Pro 5G. Once port 80 and once port 443. (Quick aside, I already have the BR1 Pro 5G user interface set to LAN Only and port 85). For internet access I use a SIM card from Telekom with public IP. The Opnsense now routes these ports (80 and 443) to a NPM (Ngnix Proxymanager), which then manages all the web servers.

Now comes the challenge at which I despair. If I call my web servers from the domains set up in the NPM outside my network (for example from a completely different internet connection), everything works as it should. However, if I am in my own network, I cannot reach the web servers for the domains I have set up.

What exactly do I have to set up so that the domains I have set up are also accessible on my own network?

When I still had the Fritz!Box 6850 5G connected, I set the IP address of the Opnsense to “Exposed Host” and everything ran smoothly.

Can someone help me and tell me step-by-step where I have to set exactly what, so that this works as shown?

Many thanks in advance.

Not sure with pepwave units but i have encountered this topic with various home and small business routers … not sure if the pepwave supports ’ local loopback ’ looks like it may not. Is there an option in pepwave to serve a local DNS cache item ? if so that might be a work around to have it resolve your domain to a local IP instead of the outside real world IP