@Tudorel Try to fill only the external port field and leave the internal port field empty then save the settings:

@dave_ps If a port negotiated speed varies between 1000mbps and 100mbps usually changing the ethernet cable can solve this issue.

@Louitz If the router internet IP address is different than the "whatismyip" shows means that you're behind a double NAT or CG-NAT. In this case porf-forwarding or DMZ won't work - they should be the...

@danoffline You have to wait for a FW update to have this feature implemented - details.

@DieGar Some regional support websites are not updated regularly. This is from Argentina support portal (this FW is for the US region): So AX23 FW should not be the culprit in this case.

@Guils if they are plugged in different ports of the router, they will share the same bandwidth, so 2.5 ghz in total.