ZyXEL Communications ZyXEL ZyWALL P1, User Manual

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ZyWALL P1 User’s Guide
Chapter 4 LAN Screens 73
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H A P T E R
4
LAN Screens
This chapter describes how to configure LAN settings.
4.1 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 and manage IP
addresses.
4.2 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 DHCP client. If DHCP service is disabled, you must have
another DHCP server on your LAN, or else the computer must be manually configured.
4.2.1 IP Pool Setup
The ZyWALL is pre-configured to provide one IP address of 169.254.1.33 to a DHCP client.
This configuration leaves 253 IP addresses (excluding the ZyWALL itself) in the lower range
for other server computers, for instance, servers for mail, FTP, TFTP, web, etc., that you may
have.
4.2.2 DNS Servers
Use the DNS screens to configure the DNS server information that the ZyWALL sends to the
DHCP client devices on the LAN.
There are three places where you can configure DNS setup on the ZyWALL.
1 Use the MAINTENANCE General screen to configure the ZyWALL to use a DNS
server to resolve domain names for ZyWALL system features like VPN, DDNS and the
time server.
2 Use the LAN screen to configure the DNS server information that the ZyWALL sends to
the DHCP client devices on the LAN.