If your Router is connecting the two networks of different areas in a large network environment with a network topology as the Figure 3-3shown, and forwards the packets between these two networks by the Routing rules, you can set it to Non-NAT mode.
Figure 3-3 Network Topology – Non-NAT Mode
If your Router is connected in a combined network topology as the Figure 3-4shown, you can set it to Classic Mode.
Figure 3-4 Network Topology – Classic Mode
Choose the menu Network→System Mode to load the following page.
