dhcp-docker/dhcpd.conf

option domain-name "slurm.ch";
option domain-name-servers ns.slurm.ch;

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

log-facility            local7;

ddns-updates            on;
ddns-update-style       interim;
ignore                  client-updates;
update-static-leases    on;
include                 "/etc/dhcp/ddns.key";

authoritative;

zone slurm.ch. {
    primary 127.0.0.1;
    key DDNS_UPDATE;
}

zone 10.in-addr.arpa. {
    primary 127.0.0.1;
    key DDNS_UPDATE;
}

subnet 10.0.0.0 netmask 255.255.0.0 {
    range 10.0.100.1 10.0.100.240;
    option routers 10.0.0.1;
    option domain-name-servers 10.0.0.1;
}

subnet 10.10.0.0 netmask 255.255.0.0 {
    range 10.10.100.1 10.10.100.240;
    option routers 10.10.0.1;
    option domain-name-servers 10.10.0.1;
}

subnet 10.20.0.0 netmask 255.255.0.0 {
    range 10.20.100.1 10.20.100.240;
    option routers 10.20.0.1;
    option domain-name-servers 10.20.0.1;
}