Linux DHCP+DDNS LAB

LAB環境說明:
1. DHCP+DNS主機IP = 10.1.3.222 , MASK = 255.255.255.0 , GATEWAY = 10.1.3.254
2. DNS Domain Name = example.local
3. Reverse DNS Domain Name = 3.1.10.in-addr.arpa

[root@localhost etc]# cat /etc/dhcpd.conf
ddns-update-style interim;
ddns-domainname "example.local";
ddns-rev-domainname "in-addr.arpa.";

key DHCP_UPDATER {
         algorithm hmac-md5;
         secret pRP5FapFoJ95JEL06sv4PQ==;
       };

       zone example.local. {
         primary 10.1.3.222;
         key DHCP_UPDATER;
       }

       zone 3.1.10.in-addr.arpa. {
         primary 10.1.3.222;
         key DHCP_UPDATER;
       }

subnet 10.1.3.0 netmask 255.255.255.0 {
range 10.1.3.50 10.1.3.100;
        option routers                  10.1.3.254;
        option subnet-mask              255.255.255.0;
        option domain-name              "example.local";
        option domain-name-servers      10.1.3.222, 168.95.192.1;
        option time-offset              -18000;
        option ntp-servers              clock.via.net;
        option netbios-name-servers     10.1.3.222;
        option netbios-node-type 8;
        allow client-updates;
        allow unknown-clients;
        ddns-updates on;
        authoritative;

[root@localhost etc]# cat /var/named/chroot/etc/named.conf
options {
        directory "/etc";
        pid-file "/var/run/named/named.pid";
        };

key DHCP_UPDATER {
         algorithm hmac-md5;
         secret pRP5FapFoJ95JEL06sv4PQ==;
       };

zone "example.local" {
        type master;
        file "/var/named/slaves/example.local.hosts";
        allow-update {
                key DHCP_UPDATER;
                };
        };
zone "3.1.10.in-addr.arpa" {
        type master;
        file "/var/named/slaves/10.1.3.rev";
        allow-update {
                key DHCP_UPDATER;
                };
        };

備註:
named.conf檔案中定義的zone file必須要存放在
/var/named/chroot/var/name/slaves目錄下(才可讀寫動態產生的dns record)