subnet 10.20.20.0 netmask 255.255.255.0 {
        option subnet-mask 255.255.255.0;
        option routers 10.20.20.1;
        option domain-name "event-tele.tg15.gathering.org";
        ddns-domainname "event-tele.tg15.gathering.org";
        range 10.20.20.4 10.20.20.254;
}