ZyXEL Communications 1000 Manual De Usuario

 Chapter 13 Interfaces

ZyWALL USG 1000 User’s Guide

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 up to three DNS servers for the DHCP clients 
to use. Use one of the following ways to specify these IP addresses.

Custom Defined - enter a static IP address.

From ISP - select the DNS server that another interface received 
from its DHCP server.

ZyWALL - the DHCP clients use the IP address of this interface and 
the ZyWALL works as a DNS relay.

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.

Enable IP/MAC 

Binding

Select this option to have this interface enforce links between specific 
IP addresses and specific MAC addresses. This stops anyone else from 
manually using a bound IP address on another device connected to 
this interface. Use this to make use only the intended users get to use 
specific IP addresses.

Enable Logs 

for IP/MAC 

Binding 

Violation

Select this option to have the ZyWALL generate a log if a device 
connected to this interface attempts to use an IP address that is 
bound to another device’s MAC address. 

Static DHCP 

Table

Configure a list of static IP addresses the ZyWALL assigns to 
computers connected to the interface. Otherwise, the ZyWALL assigns 
an IP address dynamically using the interface’s IP Pool Start 
Address and Pool Size.

Add

Click this to create a new entry. 

Edit

Select an entry and click this to be able to modify it. 

Remove

Select an entry and click this to delete it. 

#

This field is a sequential value, and it is not associated with a specific 
entry.

Table 59   Configuration > Network > Interface > Ethernet > Edit (continued)