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In this example, the assumption is made that port forwarding rules are in place on your Firewall Gateway using your public facing IP address.
There are multiple ways to achieve this per manufacturer and version, but the rules look similar to below:
IP: 123.456.789.123 Port 6001 allow/forward TCP and UDP Services to 192.168.1.101 Port 6001
IP: 123.456.789.123 Port 6002 allow/forward TCP and UDP Services to 192.168.1.102 Port 60026001