root@infra1:/etc/bind# cat named.conf.internal-zones
// New file to provide DNS for local network

// Secure updates
include "/etc/bind/ddns-keyfile.key";

zone "lab.test" IN {
        type master;
        notify no;
        file "/etc/bind/db.lab.test";
        allow-update { key ddns-key; };
        // update-policy {
        //      grant ddns-key zonesub A TXT DHCID;
        // };
};

zone "10.10.10.in-addr.arpa" IN {
        type master;
        file "/etc/bind/db.10.10.10.in-addr.arpa";
        allow-update { key ddns-key; };
        // update-policy {
        //      grant ddns-key zonesub A TXT DHCID;
        // };
};