Check Point UTM-1 Edge User Manual page 178

Configuring Network Settings
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If you chose to enable Hide NAT, it is enabled.
Configuring a DHCP Server
By default, the UTM-1 appliance operates as a DHCP (Dynamic Host Configuration
Protocol) server. This allows the UTM-1 appliance 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 UTM-1 DHCP server, you must disable the UTM-1 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 UTM-1
DHCP server, you can configure DHCP relay. When in DHCP relay mode, the UTM-1
appliance 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 188.
Note: The following DHCP server configurations are not available for the OfficeMode
network:
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Enabling and disabling the UTM-1 DHCP Server
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Setting the DHCP range manually
•
Configuring DHCP relay
164 Check Point UTM-1 Edge User Guide