WSM User Guide - WatchGuard Technologies

Changing Firebox Interface IP Addresses5 You can change the interface IP address. Type the IP address in slash notation.When you type an IP address, type all the numbers and the periods. Do not use the TAB or arrow key.6 If you are configuring a trusted or optional interface, select Disable DHCP, DHCP Server, or DHCPRelay.See “Configuring the Firebox as a DHCP server” for the DHCP server option, and see “Configuring a DHCP relay”on page 99 for the DHCP relay option. If you are configuring the external interface, see “Configuring the externalinterface” on page 100.7 Click OK.Configuring the Firebox as a DHCP serverDynamic Host Configuration Protocol (DHCP) is an Internet protocol that makes it easier to control alarge network. A computer you configure as the DHCP server automatically gives IP addresses to thecomputers on your network. You set the range of addresses. You can configure the Firebox® as a DHCPserver for networks behind the Firebox.If you have a configured DHCP server, we recommend that you continue to use that server for DHCP.1 Select Network > Configuration.The Network Configuration dialog box appears.2 Select the trusted or an optional interface.3 Click Configure and select DHCP Server.4 To add an IP address range, click Add and type the first and last IP addresses.You can configure a maximum of six address ranges.5 Use the arrow buttons to change the Default Lease Time.This is the time interval that a DHCP client can use an IP address that it receives from the DHCP server. When thetime is near its limit, the client sends data to the DHCP server to get a new lease.Configuring a DHCP relayOne method to get IP addresses for the computers on the Firebox trusted or on an optional network isto use a DHCP server on a different network. The Firebox can send a DHCP request to a DHCP server at adifferent location than the DHCP client. When the Firebox gets the reply, it sends it to the computers onthe Firebox trusted or optional network.1 Select Network > Configuration.The Network Configuration dialog box appears.2 Select the trusted or an optional interface.3 Click Configure and click DHCP Relay.4 Type the IP address of the DHCP server in the related field. Make sure to add a route to the DHCPserver, if necessary.User Guide 99