Chapter 7 LAN Screens
ZyWALL 5/35/70 Series User’s Guide
157
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).
" 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 85 Physical Network & Partitioned Logical Networks
To change your ZyWALL’s IP alias settings, click NETWORK > LAN > IP Alias. The
screen appears as shown.
Figure 86 NETWORK > LAN > IP Alias
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