Configuring the DHCP Server After dhcpd is installed, it must be configured. The DHCP daemon is configured through the dhcpd.conf file. The file can contain an extensive list of configuration commands that provide direction to the server and configuration information to the clients. A DHCP server can be configured to provide service to individual hosts and to entire subnets of hosts. The dhcpd configuration language includes host and subnet statements that identify the scope of systems being serviced. A host statement might contain the following: host osprey { hardware ethernet 00:00:0C:43:8D:FB ; fixed-address 172.16.70.8 ; } This statement defines the hostname, Ethernet address, and IP address of the client. When configured in this way, dhcpd provides a static address assignment similar to the service provided by a BootP server. This statement matches the client’s Ethernet address against the configuration entry, and returns a static IP address to the client. Using this technique, DHCP can be used to assign static addresses to systems, such as name servers, that require static addresses. The format of the subnet statement is subnet 172.16.70.0 netmask 255.255.255.0 { range 172.16.70.100 172.16.70.250 ; } The subnet statement declares that the system is providing DHCP service to network 172.16.70.0. Furthermore, the range clause says that the server is providing dynamic addressing, and that the

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