Configuring The Trusted Network For Dhcp Relay - Watchguard Firebox X15 User Manual

Changing Your Network Settings
2
Click the DHCP Reservations button.
The DHCP Address Reservations page appears.
3
Type a static IP address in the IP Address field. The IP address
must be on the trusted network.
For example, if the trusted network starts with 192.168.111.1, you can
enter any address from 192.168.111.2 to 192.168.111.254.
4
Type the MAC address of the computer on the trusted network
in the MAC Address field. You must enter the MAC address as
12 hexadecimal digits with no space, dash, or semicolon
characters. Click Add.
5
Click Submit.

Configuring the trusted network for DHCP relay

One method to get IP addresses for the computers on the Firebox
trusted network is to use a DHCP server on a different network. The
Firebox can send a DHCP request to a DHCP server at a different
location through a VPN tunnel. It gives the reply to the computers
on the Firebox trusted network. This option lets computers in more
than one office use the same network address range. In this proce-
dure the Firebox is a DHCP Relay Agent. You must set up a VPN
between the Firebox and the DHCP server for this feature to operate
correctly.
70 WatchGuard Firebox X Edge