@MOdra If your new ISP bandwidth is more than 100mbps, it is suggested to upgrade your router since it's not a gigabit router - VR300 specs.

@MOdra VR300 can operate as a DSL modem router or wireless router through its operation mode setting. In the first case it utilizes an RJ-11 connection and in the second it utilizes RJ-45 connection...

@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.