Sample dhcpd config for autoupdate dns with static addr machines.

dhcpd.conf

ddns-update-style interim;

# If you have fixed-address entries you want to use dynamic dns
update-static-leases on;

key rndc-key {
  algorithm hmac-md5;
  secret YourSecretKeyHere;
}

zone 1.168.192.in-addr.arpa {
  primary localhost;
  key rndc-key;
}

zone yourdomain.com {
  primary localhost;
  key rndc-key;
}

option domain-name "yourdomain.com";
option subnet-mask 255.255.255.0;

default-lease-time 600;
max-lease-time 7200;

log-facility local7;

subnet 192.168.1.0 netmask 255.255.255.0 {
  range 192.168.1.100 192.168.1.200;
  option domain-name-servers 192.168.1.1;
  option broadcast-address 192.168.1.255;
  option routers 192.168.1.1;
  #ddns-hostname = concat(binary-to-ascii(10, 8, "-", leased-address), ".locals");
  ddns-domainname = "yourdomain.com";
}

group {
  ddns-domainname = "yourdomain.com";
  use-host-decl-names on;

  host webserver {
    hardware ethernet MAC-addr;
    fixed-address 192.168.1.2;
    ddns-hostname = "webserver";
  }

  host tvcomp {
    hardware ethernet MAC-addr;
    fixed-address 192.168.1.3;
    ddns-hostname = "tvcomp";
  }
}