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The asterisk "*" before a MAC address means that the DHCP server does not track the client using
the MAC address but instead tracks the client through a client identifier which the client has given
to the server.
Tip: Lease database saving
DHCP leases are, by default, remembered by NetDefendOS between system restarts.
The DHCP advanced settings can be adjusted to control how often the lease database
is saved.
Additional Server Settings
A NetDefendOS DHCP server can have two other sets of objects associated with it:
• Static Hosts.
• Custom Options.
The illustration below shows the relationship between these objects.
Figure 5.1. DHCP Server Objects
The following sections discuss these two DHCP server options.
5.2.1. Static DHCP Hosts
Where the administrator requires a fixed relationship between a client and the assigned IP address,
NetDefendOS allows the assignment of a given IP to a specific MAC address. In other words, the
creation of a static host.
Static Host Parameters
Many such assignments can be created for a single DHCP server and each object has the following
parameters:
Host
This is the IP address that will be handed out to the client.
MAC Address
This is the MAC address of the client. Either the MAC address can be
used or the alternative Client Identified parameter can be used.
Client Identified
If the MAC address is not used for identifying the client then the client
can send an identifier in its DHCP request. The value of this identifier
5.2.1. Static DHCP Hosts Chapter 5. DHCP Services
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