DNS可以只做正向解析吗

sudo apt-get update
sudo apt-get install bind9

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

$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       192.0.2.1
ns2     IN      A       192.0.2.2
www     IN      A       192.0.2.3

sudo systemctl start bind9
sudo systemctl enable bind9

dig www.example.com