ZyWALL 5/35/70 Series User’s Guide

CHAPTER 5

LAN Screens

This chapter describes how to configure LAN settings. This chapter is only applicable when the ZyWALL is in router mode. The LAN Port Roles screen is available on the ZyWALL 5 and ZyWALL 35.

5.1 LAN Overview

Local Area Network (LAN) is a shared communication system to which many computers are attached. The LAN screens can help you configure a LAN DHCP server, manage IP addresses, and partition your physical network into logical networks.

5.2 DHCP Setup

DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows individual clients to obtain TCP/IP configuration at start-up from a server. You can configure the ZyWALL as a DHCP server or disable it. When configured as a server, the ZyWALL provides the TCP/IP configuration for the clients. If DHCP service is disabled, you must have another DHCP server on your LAN, or else the computer must be manually configured.

5.2.1 IP Pool Setup

The ZyWALL is pre-configured with a pool of IP addresses for the DHCP clients (DHCP Pool). See the product specifications in the appendices. Do not assign static IP addresses from the DHCP pool to your LAN computers.

5.3 LAN TCP/IP

The ZyWALL has built-in DHCP server capability that assigns IP addresses and DNS servers to systems that support DHCP client capability.

5.3.1 Factory LAN Defaults

The LAN parameters of the ZyWALL are preset in the factory with the following values:

•IP address of 192.168.1.1 with subnet mask of 255.255.255.0 (24 bits)

•DHCP server enabled with 128 client IP addresses starting from 192.168.1.33.

Chapter 5 LAN Screens

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