Process of how to open ports on Comtrend AR-5381u Modem

Ok so, this is how my cords are set up: ethernet cable running from internet port on router to ethernet port on modem. Then ethernet cable running from internet port on modem to ethernet port on a similar looking black box that says "Comtrend OT-5072T"

[quote user="IsAaCbe ballin"]Then ethernet cable running from internet port on modem to ethernet port on a similar looking black box that says "Comtrend OT-5072T"[/quote]Can you verify if this is the Comtrend CT-5072T.

Thank you!

This configuration is a step by step, so it has to be done exactly what is in the process.

set a fixed ip for the console/PC, open the ports described below, disable and enable the UPnP function and disable the modem firewall, if you have a modem and a router the process has to be done on both devices.

Put console/PC IP in DMZ zone.

Port 88 (UDP)

Port 3074 (UDP and TCP)

Port 53 (UDP and TCP)

Port 80 (TCP)

Port 500 (UDP)

Port 3544 (UDP)

Port 4500 (UDP)

This configuration is a step by step, so it has to be done exactly what is in the process.

set a fixed ip for the console/PC, open the ports described below, disable and enable the UPnP function and disable the modem firewall, if you have a modem and a router the process has to be done on both devices.
Put console/PC IP in DMZ zone.

Port 88 (UDP)
Port 3074 (UDP and TCP)
Port 53 (UDP and TCP)
Port 80 (TCP)
Port 500 (UDP)
Port 3544 (UDP)
Port 4500 (UDP)

You know I've been wondering: How do I do this for both my PC and Console? Because DMZ only accepts 1 IP

Yeah, it has always been wired directly to the Comtrend Modem.