The system is a white list as default, so if you want to allow a IP only, you should set a block all rule and give it a lower priority.

I suggest you to download firmware from the official website, which I think is more reliable.

I think you may need to creat another two independent VPN line.

Have your problem solved? Maybe I can help you. There are some mistake in your config. If you want one prot to communicate with another port, you should put them in the SAME VLAN, otherwise, they are...

Hi UPPP, go ahead and write a letter of complaint to the TP-link head quarter! Could please tell us your network topology? How you connect your switch to your front router or other devices?

You can try Voice Vlan function in the QOS