@CougarXR7 I believe TP-Link routers only support hyphen (the minus sign - ) for defining port ranges.

@Dooberino Because the AX50's signal is quite weak at the farthest point of my apartment I tried to improve that by using the old WR841N as range extender for 2.4 GHz, placed about halfway in between...

@Dooberino Some time ago I've had an old WR841N router with DD-WRT running as a range extender connected to my AX50. I can't recall now how I set it up at the time though. I do remember it took me a...

@Dooberino Normally there is nothing to be configured on the main router (the AX50 in your case). You connect the "client" router to the main router via the client router's WDS setup and that's it....

@ron89f I presume the vast majority of home users with true fiber-optic connections just use the hardware (ONT) given or installed by their ISP and then connect their own router to it if they wish,...

@sakchaij Ok, that sounds like this is a bug in the firmware then.