option domain-name-servers 114.114.114.114;
ddns-update-style interim;
default-lease-time 3600;
max-lease-time 7200;
log-facility local7;
subnet 10.12.77.0 netmask 255.255.255.0 {
range 10.12.77.2 10.12.77.254;
option routers 10.12.77.1;
option domain-name-servers 180.76.76.76;
default-lease-time 7200;
max-lease-time 7200;
}