@yassine12 

Good day.

Thank you very much for your time and patience.

Sorry for the delay.

May I know the hardware and firmware version of the TD-W8961N?

Did you set up the VPN client connection on the devices connected behind the TD-W8961N?

And what VPN connection did you use, Nord VPN or Express VPN?

Thanks a lot.

@yassine12 

Good day,

Thank you very much for your time and patience.

Sorry for the delay.

It seemed like the VPN pass-through was enabled by default and it could not be turned off;

So currently, we might need to cut off the internet access on the TD-W8961N completely in order to block the VPN connection;

Update： Or if you know which port is used by the melon VPN, maybe you could try to filter this specific port on the TD-W8961;

Thanks a lot.