TP-LINK TL-MR6400 how to open access to port 55777?

Question

TP Link

Hello,
dear friends, help me solve the problem with the stupid VIPNET and the astgoz platform.
Through the mobile Internet, everything is immediately connected, through another office Internet connected via TP-LINK, nothing works on the same 4G SIM card. I was told to open port 55777, I have already tried all the perversions.
Tell me how to do this, I am attaching a screenshot of the router panel.
PS. The port must be opened for at least one computer and for the entire office, the required protocols are TCP, UPD
UPnP works on the router.
what ports besides 55777 should still work?