ZyXEL Communications ZYWALL USG 20 Manual page 281

Table 71 Configuration > Network > Interface > Bridge > Edit (continued)
LABEL
IP Pool Start
Address
Pool Size
First DNS
Server
Second DNS
Server
Third DNS
Server
First WINS
Server, Second
WINS Server
Lease time
Enable IP/MAC
Binding
Enable Logs
for IP/MAC
Binding
Violation
Static DHCP
Table
ZyWALL USG 20/20W User's Guide
DESCRIPTION
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.
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.
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.
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.
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.
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.
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.
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.
Chapter 11 Interfaces
281