ZyXEL Communications ZyWALL 1000 User Manual

 Chapter 10 Interface

ZyWALL USG 1000 User’s Guide

Relay Server 2

This field is optional. Enter the IP address of another DHCP server for the 

network.

These fields appear if the ZyWALL is a DHCP Server.

IP Pool Start 

Address

Enter the IP address from which the ZyWALL begins allocating IP addresses. If 

you want to assign a static IP address to a specific computer, click Add Static 

DHCP.
If this field is blank, the Pool Size must also be blank. In this case, the ZyWALL 

can assign every IP address allowed by the interface’s IP address and subnet 

mask, except for the first address (network address), last address (broadcast 

address) and the interface’s IP address.

Pool Size

Enter the number of IP addresses to allocate. This number must be at least one 

and is limited by the interface’s Subnet Mask. For example, if the Subnet Mask 

is 255.255.255.0 and IP Pool Start Address is 10.10.10.10, the ZyWALL can 

allocate 10.10.10.10 to 10.10.10.254, or 245 IP addresses.
If this field is blank, the IP Pool Start Address must also be blank. In this case, 

the ZyWALL can assign every IP address allowed by the interface’s IP address 

and subnet mask, except for the first address (network address), last address 

(broadcast address) and the interface’s IP address.

First DNS Server

Second DNS 

Server

Third DNS 

Server

Specify the IP addresses of a maximum of three DNS servers that the network 

can use. The ZyWALL provides these IP addresses to DHCP clients. You can 

specify these IP addresses two ways.
Custom Defined - enter a static IP address.
From ISP - use the IP address of a DNS server that another interface received 

from its DHCP server.

First WINS 

Server, Second 

WINS Server 

Type the IP address of the WINS (Windows Internet Naming Service) server 

that you want to send to the DHCP clients. The WINS server keeps a mapping 

table of the computer names on your network and the IP addresses that they 

are currently using.  

Lease time

Specify how long each computer can use the information (especially the IP 

address) before it has to request the information again. Choices are:
infinite - select this if IP addresses never expire.
days, hours, and minutes - select this to enter how long IP addresses are 

valid.

Table 50   Network > Interface > Ethernet > Edit (continued)