• A specific IP address.
This is the IP address of the DHCP relayer through which the DHCP request has come.
Requests from local clients or other DHCP relayers will be ignored.
IPv4 DHCP Options
The following options can be configured for a DHCP server:
General Parameters
Name A symbolic name for the server. Used as an interface reference but also
used as a reference in log messages.
Interface Filter The source interface on which NetDefendOS will listen for DHCP
requests. This can be a single interface or a group of interfaces.
Relay Filter A filter for the relay address. The possible values for this and their
meanings are listed earlier in this section.
IP Address Pool An IP range, group or network that the DHCP server will use as an IP
address pool for handing out DHCP leases.
Netmask The netmask which will be sent to DHCP clients.
Optional Parameters
Default GW This specifies what IP should be sent to the client for use as
the default gateway (the router to which the client
connects).
Domain The domain within which users are situated. When a user
types a simple string into a browser instead of a valid URL,
the domain property value can be appended by the
browser to form a URL. For example, if the Domain value is
"example.com", when the user types just the word "wiki",
the browser can try the URL "wiki.example.com".
Lease Time The time, in seconds, that a DHCP lease is provided. After
this time the DHCP client must renew the lease.
Primary/Secondary DNS The IP of the primary and secondary DNS servers.
Primary/Secondary NBNS/WINS IP of the Windows Internet Name Service (WINS) servers that
are used in Microsoft environments which uses the NetBIOS
Name Servers (NBNS) to assign IP addresses to NetBIOS
names.
Next Server Specifies the IP address of the next server in the boot
process. This is usually a TFTP server.
DHCP Server Advanced Settings
There are two advanced settings which apply to all DHCP servers:
• Auto Save Policy
Chapter 5: DHCP Services
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