@soumatou Try the http://tplinkmodem.net/ while connected to the modem (wired or wireless). If this still doesn't work, you may need to reset the VR300 to its factory defaults and reconfigure from...

@apacheuk From your desription most probably you have to switch VR2800 in wireless router mode - here's a guide on that.

@Morcar Use your router user guide - here. You can set the Access Control with "Allow list" option (Chapter 13.2) and add the real MAC addresses of the children's devices. Then configure the Parental...

@Sulooo If you're under CG-NAT that means you're behnd double NAT - once by your ISP and once by your router. Usually behind CG-NAT all ports are closed, but to be sure you can contact your ISP and...

@Sulooo In general, if you disable UPnP all router ports wiould be blocked, unless you configure a manual port-forwarding (virtual-servers). If you configugure DMZ for a host, all router ports would...

@Mahpooya You shouldn't restart the modem every time you change the bandwidth control options. This even isn't mentioned in the modem user guide - Chapter 9.