User's Manual

Routing

Routing is the act of moving information across an internetwork from a source to a destination.

Along the way, at least one intermediate node typically is encountered. Routing is often contrasted

with bridging, which might seem to accomplish precisely the same thing to the casual observer.

The primary difference between the two is that bridging occurs at Layer 2 (the link layer) of the

OSI reference model, whereas routing occurs at Layer 3 (the network layer). This distinction

provides routing and bridging with different information to use in the process of moving

information from source to destination, so the two functions accomplish their tasks in different

ways. The Routing screen is shown in the figure below.

1. LAN TCP Port Forwards: Forward packets destined to TCP ports in the first range to the

LAN machine with the specified IP address. You may optionally specify a second range (the

ranges may not overlap and must be the same size).

Figure 13. Routing Screen (1)