Figure 54 Physical Network & Partitioned Logical Networks - ZyXEL Communications ZyWall 5 Series User Manual

ZyWALL 5/35/70 Series User's Guide
The ZyWALL has a single LAN interface. Even though more than one of ports 1~4 may be in
the LAN port role, they are all still part of a single physical Ethernet interface and all use the
same IP address.
The ZyWALL supports three logical LAN interfaces via its single physical LAN Ethernet
interface. The ZyWALL itself is the gateway for each of the logical LAN networks.
When you use IP alias, you can also configure firewall rules to control access between the
LAN's logical networks (subnets).
Note: Make sure that the subnets of the logical networks do not overlap.
The following figure shows a LAN divided into subnets A, B, and C.
Figure 54 Physical Network & Partitioned Logical Networks
To change your ZyWALL's IP alias settings, click NETWORK > LAN > IP Alias. The
screen appears as shown.
Chapter 6 LAN Screens 137