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Internet Security Router User
’s Manual
Chapter 5. Configuring LAN Settings
27
On a DHCP-enabled network, the IP information is assigned dynamically rather than statically. A DHCP client
can be assigned a different address from the pool each time it reconnects to the network.
5.2.2
Why use DHCP?
DHCP allows you to manage and distribute IP addresses throughout your network from the Internet Security
Router. Without DHCP, you would have to configure each computer separately with IP address and related
information. DHCP is commonly used with large networks and those that are frequently expanded or otherwise
updated.
5.2.3
Configuring DHCP Server
Note
By default, the Internet Security Router is configured as a DHCP
server on the LAN side, with a predefined IP address pool of
192.168.1.10 through 192.168.1.42 (subnet mask
255.255.255.0). To change this range of addresses, follow the
procedures described in this section.
First, you must configure your PCs to accept DHCP information assigned by a DHCP server:
1.
Log into Configuration Manager as administrator, click the LAN menu, and then click the DHCP
submenu. The DHCP Configuration page displays as shown in Figure 5.2:
Figure 5.2. DHCP Configuration Page
2.
Enter the information for the IP Address Pool (Begin/End Address), Subnet Mask, Lease Time
and Default Gateway IP Address, fields; others, such as Primary/Secondary DNS Server IP
Address and Primary/Secondary WINS Server IP Address are optional. However, it is
recommended that you enter the primary DNS server IP address in the space provided. You may