BIND : Configure Secondary Server

	Configure DNS Secondary Server. On this example, it shows to configure DNS Secondary Server [ns.server.education] (192.168.100.85) that DNS Primary Server is [dlp.srv.world] (172.16.0.82) configured like here. Replace IP address and Hostname to your own environment.
[1]	Configure on DNS Primary Server Host.

root@dlp:~#  vi /etc/bind/named.conf.options ..... ..... options { directory "/var/cache/bind"; ..... ..... allow-query { localhost; internal-network; }; // add secondary server to allow to transfer zone files allow-transfer { localhost; 192.168.100.85; }; allow-recursion { localhost; internal-network; }; ..... ..... root@dlp:~#  vi /etc/bind/srv.world.wan $TTL 86400 @ IN SOA dlp.srv.world. root.srv.world. ( ;; update serial numbere 2025081905 ;Serial 3600 ;Refresh 1800 ;Retry 604800 ;Expire 86400 ;Minimum TTL ) IN NS dlp.srv.world. ;; add secondary server IN NS ns.server.education. IN A 172.16.0.82 IN MX 10 dlp.srv.world. dlp IN A 172.16.0.82 www IN A 172.16.0.83 root@dlp:~#  systemctl restart named

[2]	Configure on DNS Secondary Server Host.

root@ns:~#  vi /etc/bind/named.conf.external-zones // add target zone info // for IP address, it's the Primary server's IP address zone "srv.world" IN { type secondary; primaries { 172.16.0.82; }; file "/etc/bind/secondary/srv.world.wan"; }; root@ns:~#  mkdir /etc/bind/secondary root@ns:~#  chown bind:bind /etc/bind/secondary root@ns:~#  rndc reload root@ns:~#  ls /etc/bind/secondary srv.world.wan    # zone file has been transferred