User guide

Chapter 5: Using Policy Manager to Configure Your Network
60 WatchGuard Firebox System
Adding a new subnet
To make available (private) IP addresses accessible to DHCP clients, add a
subnet. To add a new subnet, you specify a range of IP addresses to be
assigned to clients on the network. For example, you could define the
address range from 10.1.1.10 to 10.1.1.19 to give clients a pool of 10
addresses. From Policy Manager:
1 Select Network => DHCP Server.
2 Click Add.
The DHCP Subnet Properties dialog box appears, as shown in the following figure.
3 In the Subnet box, type the subnet’s IP address; for example, 10.1.1.0/
24.
4 Define the address pool by entering values for Start and End fields.
5 Click OK.
Modifying an existing subnet
You can modify an existing subnet; however, you should be aware that
doing so can cause problems. If you modify the subnet and then reboot
the client, the Firebox may return an IP address that does not work with
certain devices or services. From Policy Manager:
1 Select Network => DHCP Server.
2 Click the subnet to review or modify. Click Edit.
3 The DHCP Subnet Properties dialog box appears.
4 When you have finished reviewing or modifying the subnet, click
OK.