Configuring DHCP services System DHCP
FortiGate Version 4.0 MR1 Administration Guide
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Configuring DHCP services
Go to System > DHCP > Service to configure DHCP services. On each FortiGate
interface, you can configure a DHCP relay or add DHCP servers as needed.
On FortiGate 50 and 60 series units, a DHCP server is configured, by default, on the
Internal interface, as follows:
You can disable or change this default DHCP Server configuration.
These settings are appropriate for the default Internal interface IP address of
192.168.1.99. If you change this address to a different network, you need to change the
DHCP server settings to match.
Figure 102: DHCP service list - FortiGate-200A shown
IP Range 192.168.1.110 to 192.168.1.210
Netmask 255.255.255.0
Default gateway 192.168.1.99
Lease time 7 days
DNS Server 1 192.168.1.99
Note: You can not configure DHCP in Transparent mode. In Transparent mode DHCP
requests pass through the FortiGate unit.
Note: An interface must have a static IP before you configure a DHCP server on it.
Interface List of FortiGate interfaces. Expand each listed interface to view the Relay and
Servers.
Server Name/
Relay IP
Name of FortiGate DHCP server or IP address of DHCP server accessed by
relay.
Type Type of DHCP relay or server: Regular or IPSec.
Enable Green check mark icon indicates that server or relay is enabled.
Add DHCP Server
icon
Select to configure and add a DHCP server for this interface.
Add DHCP Server
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