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“main” (Installation and Administration) — 2004/6/25 — 13:29 — page 524 — #550

Selecting the Declaration Type The ‘Global Options’ of the DHCP server

are made up of a number of declarations. This dialog lets you set the

declaration types ‘Subnet’, ‘Host’, ‘Shared Network’, ‘Group’, ‘Pool

of Addresses’, and ‘Class’. This example shows the selection of a new

subnetwork (see Figure 21.42).

Figure 21.42: DHCP Server: Selecting a Declaration Type

Subnet Conﬁguration This dialog allows you specify a new subnet with

its IP address and netmask. In the middle part of the dialog, modify

the DHCP server start options for the selected subnet using ‘Add’,

‘Edit’, and ‘Delete’. To set up dynamic DNS for the subnet, select ‘Dy-

namic DNS’.

TSIG Key Management If you chose to conﬁgure dynamic DNS in the

previous dialog, you can now conﬁgure the key management for a

secure zone transfer. Selecting ‘OK’ takes you to another dialog in

which to conﬁgure the interface for dynamic DNS.

Dynamic DNS: Interface Conﬁguration

You can now activate dynamic DNS for the subnet by selecting ‘En-

able Dynamic DNS for This Subnet’. After doing so, use the

drop-down menu to choose the TSIG keys for forward and reverse

zones, making sure that keys are the same for the DNS and the DHCP

524 21.11. DHCP