User guide

Configuring Network Settings
86 Check Point ZoneAlarm User Guide
Configuring a DHCP Server
By default, the ZoneAlarm router operates as a DHCP (Dynamic Host Configuration
Protocol) server. This allows the ZoneAlarm router to automatically configure all the
devices on your network with their network configuration details.
Note: The DHCP server only serves computers that are configured to obtain an IP
address automatically. If a computer is not configured to obtain an IP address
automatically, it is recommended to assign it an IP address outside of the DHCP
address range. However, if you do assign the computer an IP address within the
DHCP address range, the DHCP server will detect this and will not assign this IP
address to another computer.
If you already have a DHCP server in your internal network, and you want to use it instead
of the ZoneAlarm DHCP server, you must disable the ZoneAlarm DHCP server, since you
cannot have two DHCP servers or relays on the same network segment.
If you want to use a DHCP server on the Internet or via a VPN, instead of the ZoneAlarm
DHCP server, you can configure DHCP relay. When in DHCP relay mode, the ZoneAlarm
router relays information from the desired DHCP server to the devices on your network.
Note: You can perform DHCP reservation using network objects. For information,
see Using Network Objects on page
95.
Enabling/Disabling the ZoneAlarm DHCP Server
You can enable and disable the ZoneAlarm DHCP Server for internal networks.
To enable/disable the ZoneAlarm DHCP server
1. Click Network in the main menu, and click the My Network tab.
The My Network page appears.
2. In the desired network's row, click Edit.
The Edit Network Settings page appears.
3. From the DHCP Server list, select Enabled or Disabled.
4. Click Apply.