ddns-update-style none; subnet 192.168.254.0 netmask 255.255.255.0 { range 192.168.254.1 192.168.254.253; option routers 192.168.254.254; option domain-name "virtual.example.com"; # find your DNS servers from /etc/resolv.conf # otherwise only pure IP addresses will work option domain-name-servers 192.168.254.254; option broadcast-address 192.168.254.255; default-lease-time 86400; }