ZyXEL Communications ZyXEL ZyWALL 35 - Manual (Page 99)

ZyWALL 35 User’s Guide
Chapter 4 LAN Screens 97
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H A P T E R
4
LAN Screens
This chapter describes how to configure LAN settings. This chapter is only applicable when
the ZyWALL is in router mode.
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, manage IP addresses,
and partition your physical network into logical networks.
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 clients. 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 with a pool of 128 IP addresses starting from 192.168.1.33 to
192.168.1.160. This configuration leaves 127 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 DNS System 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 DNS LAN screen to configure the DNS server information that the ZyWALL
sends to the DHCP client devices on the LAN.
3 Use the REMOTE MGMT DNS screen to configure the ZyWALL (in router mode) to
accept or discard DNS queries.