DNS 위임 (Master, Slave)

DNS 위임

1.CentOS 1st - net. Master NS
--------------------------- /etc/named.conf -------------------
zone "net" IN {
        type master;
        file "net.zone";
        allow-update { none; };
        allow-transfer { none; };
};

---------------------- /var/named/net.zone ------------------
$ORIGIN net.
$TTL    3H
@               IN SOA          ns              root    (
                                2014110502      ; Serial
                                3H              ; Refresh
                                15M             ; Retry
                                1W              ; Expire
                                3H      )       ; Min TTL

                IN NS           ns

ns              IN A            192.168.2.150

daum            IN NS           ns.daum  <- 위임
ns.daum         IN A            192.168.2.210 <- 위임 IP
---------------------------------------------------------------

2. CentOS 2nd - daum.net. Master NS
--------------------------- /etc/named.conf -------------------
zone "daum.net" IN {
        type master;
        file "daum.net.zone";
        allow-update { none; };
        allow-transfer { none; };
};

------------------- /var/named/daum.net.zone -----------------
$ORIGIN daum.net.
$TTL    3H
@               IN SOA          ns              root    (
                                2014110400      ; Serial
                                3H              ; Refresh
                                15M             ; Retry
                                1W              ; Expire
                                3H      )       ; Min TTL

                IN NS           ns
                IN MX   10      mail
ns              IN A            192.168.2.200
mail            IN A            5.5.5.5

www             IN A            88.88.88.88
ftp             IN A            99.99.99.99