so it looks like you have a modem and a router or a router and a wifi router or some similar setup.
on the 192.168.50.1 device port forward tcp (may as well do udp as well for fgu) 1802 to your computer IP
on the 192.168.100.254 device port forward tcp (may as well do udp as well for fgu) 1802 to the wan ip address of the 192.168.50.1 device

