自建dns二级域名

; 示例DNS配置文件 named.conf.local
zone "example.com" {
    type master;
    file "/etc/bind/db.example.com";
};

zone "subdomain.example.com" {
    type master;
    file "/etc/bind/db.subdomain.example.com";
};

; db.example.com 文件内容
$TTL 86400
@       IN      SOA     ns1.example.com. admin.example.com. (
                        2023010101      ; Serial
                        3600            ; Refresh
                        1800            ; Retry
                        604800          ; Expire
                        86400           ; TTL
                        )
        IN      NS      ns1.example.com.
        IN      NS      ns2.example.com.
ns1     IN      A       192.168.1.1
ns2     IN      A       192.168.1.2
www     IN      A       192.168.1.3

; db.subdomain.example.com 文件内容
$TTL 86400
@       IN      SOA     ns1.example.com. admin.example.com. (
                        2023010101      ; Serial
                        3600            ; Refresh
                        1800            ; Retry
                        604800          ; Expire
                        86400           ; TTL
                        )
        IN      NS      ns1.example.com.
        IN      NS      ns2.example.com.
subdomain IN      A       192.168.1.4