Changing The Ip Address Of The Trusted Network - Watchguard Firebox X15 User Manual

You can use static IP addresses or DHCP for the computers on your
trusted network. The Firebox® X Edge has a built-in DHCP server to
give IP addresses to computers on your trusted and optional net-
works. You can also change the IP address of the trusted network.
The factory-default settings of a Firebox DHCP server automatically
give IP addresses to computers on the trusted network. The trusted
network starts with IP address 192.168.111.1. It is a "class C" net-
work with a subnet mask of 255.255.255.0. The Firebox can give an
IP address from 192.168.111.2 to 192.168.111.254. The factory-
default settings use the same DNS server information on the internal
and external interfaces.
If necessary, you can disable the Firebox DHCP server. Or, you can
use the Firebox as a DHCP Relay Agent and send DHCP requests to a
DHCP server on a different network using a VPN tunnel. You can
also use static IP addresses for the computers on your trusted net-
work.
Any changes to the trusted network configuration page require that
you click Submit and then restart the Firebox before the new con-
figuration starts. You can make many changes at one time and then
restart just one time when you are done.

Changing the IP address of the trusted network

If necessary, you can change the trusted network IP address. For
example, if you connect two or more Firebox devices in a virtual pri-
vate network, each Firebox must use a different trusted network
address. If the two sides of the VPN (Virtual Private Network) use the
same trusted network IP addresses, one side must change the trusted
network IP address range so that it is different from the other side.
For more information, see "What You Need to Create a VPN" on
page 176.
If you change the IP address of the Edge's trusted interface, you
must use the new IP address in your browser address bar to
connect to the Edge's Web management interface.
For example, you change the Edge trusted interface IP address
from the default 192.168.111.1 to 10.0.0.1, then you click Submit.
Then, you must use https://10.0.0.1 in your browser address bar to
connect to the Edge's System Status page. Also, your computer's
User Guide
Configuring the Trusted Network
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