Configuring DHCP services System DHCP
FortiGate Version 4.0 Administration Guide
174 01-400-89802-20090424
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Figure 91: DHCP Server options
Name Enter a name for the DHCP server.
Enable Enable the DHCP server.
Type Select Regular or IPSEC DHCP server.
You cannot configure a Regular DHCP server on an interface that has a
dynamic IP address.
IP Range Enter the start and end for the range of IP addresses that this DHCP server
assigns to DHCP clients.
These fields are greyed out when IP Assignment Mode is set to User-group
defined method.
Network Mask Enter the netmask of the addresses that the DHCP server assigns.
Default Gateway Enter the IP address of the default gateway that the DHCP server assigns to
DHCP clients.
Domain Enter the domain that the DHCP server assigns to DHCP clients.
Lease Time Select Unlimited for an unlimited lease time or enter the interval in days,
hours, and minutes after which a DHCP client must ask the DHCP server for
new settings. The lease time can range from 5 minutes to 100 days.
Advanced Select to configure advanced options. The remaining options in this table are
advanced options.
IP Assignment
Mode
Determines how the IP addresses for DHCP are assigned. Select:
• Server IP Range - The server will assign the IP addresses as specified in
IP Range, and Exclude Ranges.
• User-group defined method - The IP addresses will be assigned via
RADIUS through the user group used to authenticate the user. See
“Dynamically assigning VPN client IP addresses from a RADIUS record”
on page 573.
When User-group defined method is selected, the IP Range fields are greyed
out, and the Exclude Ranges table and controls are not visible.
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