You can try port 50443,9999,60443 and 443. They work on my case. However, if your ISP blocks any one of these ports, it may not work.

You are welcome :)

Have you clicked Wireless Security on the left side menu and checked the password there? If you want to connect to the wifi of TP-Link router, the password should be the one under Wireless security,...

Not very sure about the issue. Maybe you can show us a screenshot of the error and the WDS settings on TP-Link? Since you can log in the Admin page of TP-Link, you may go to Wireless-->Wireless...

Welcome :)

There isn't any compatibility between them. If it shows cable unplugged on the TL-WDR4300, you can probably check the hardwire connection between the router and the modem, try different cables and...