Arris NVG589 or NVG510 Router – See steps below
1) First, you will need the device id located on side of modem, not wifi password.
2) Open internet browser from home computer/laptop.
3) Goto 192.168.1.254 in address bar, not Google search.
4) Click firewall tab
5) Click IP/passthrough tab
6) Select default server by allocation mode.
7) Enter device access code when prompted.
8) Enter DVR IP Address(found on your receipt) by default server internal address.
9) Click save.