ATEN KN Series 32-Port KVM over IP Switch with Dual Power/LAN (1-Local + 4-Remote Access) - Manual (Page 278)

KVM over IP Switch User Manual
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Port Forwarding
For devices located behind a router, port forwarding allows the router to pass
data coming in over a specific port to a specific device. By setting the port
forwarding parameters, you tell the router which device to send the data that
comes in over a particular port to.
For example, if the KVM over IP switch connected to a particular router has an
IP address of 192.168.1.180, you would log into your router’s setup program
and access the Port Forwarding (sometimes referred to as
Virtual Server )
configuration page. You would then specify 192.168.1.180 for the IP address
and the port number you want opened for it (9000 for Internet access, for
example).
Since configuration setup can vary somewhat for each brand of router, refer to
the router’s User Manual for specific information on configuring port
forwarding for it.