I found the problem :frowning:
only 1 ip address can use 1 port number :frowning:

2 different ip addresses CANNOT use same opened port :frowning: :frowning: :frowning:

This is disgusting! I want one device to use port 443 and another device to also use port 443 but router won’t allow both :frowning:

edit: My old router allowed me to set port forwarding for one device and for another device, i put it on DMZ list (which worked) but here, I can put either port forward rule for 1 device OR use DMZ (otherwise go to LuCi [aka hell])