9.2.2 Gateway
Entry of this setting is optional. You will use it if setting up a Link-Group to
navigate across subnets. If it is not explicitly stated, the system will revert to the
device IP address.
9.3 Configuring an external IP address
You will use an external or public IP address when routing LQ devices over firewalls
(this will almost always be the case when connecting over the Internet). A Link-
Master connected to devices beyond a firewall will always use an external IP
address and an external port. Link-Members will use external addressing and ports
if connecting over firewalls also. See 7 Internet connectivity for more detail on
external IP addresses and ports.