LAN only port forwarding?

[Teddyz]

I am not really sure what to call it or if it exists. But I have a mosquitto mqtt-broker on my lan.

Some day I will move it to another (Windows) computer, meaning a new IP.

For external users this is no problem, just a setting on the port forwarding-page in my Asus AX-88U.

For internal users, I must change IP for each and everyone, since they use the non-secure 1883 port.

It would be great if they all could connect to the router, 192.168.1.1:1883, and the router would send them to correct ip, just as for the external users.

Does this function exist? Or do you have another ideas for me?

 

[ColinTaylor]

I don't know whether this would work, but try using the router's WAN IP address (like external users do) instead of 192.168.1.1.