Check Point UTM-1 Edge User Manual page 181

The DHCP IP range fields appear.
2) In the DHCP IP range fields, type the desired DHCP range.
Click Apply.
4.
A warning message appears.
Click OK.
5.
A success message appears
6. If your computer is configured to obtain its IP address automatically (using
DHCP), and either the UTM-1 DHCP server or another DHCP server is
enabled, restart your computer.
Your computer obtains an IP address in the new DHCP address range.
Chapter 6: Managing Your Network
Configuring Network Settings
167