BIND : Verify Resolution
2022/04/26



[1] Restart BIND to apply changes.

root@dlp:~# systemctl restart named



[2] Change DNS setting to refer to own DNS if need.

root@dlp:~# vi /etc/netplan/01-netcfg.yaml
# change to self IP address

    nameservers:
        addresses: [10.0.0.30]


root@dlp:~# netplan try
root@dlp:~# netplan apply



[3] Verify Name and Address Resolution. If [ANSWER SECTION] is shown, that's OK.

root@dlp:~# dig dlp.srv.world.  

; <<>> DiG 9.18.1-1ubuntu1-Ubuntu <<>> dlp.srv.world.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 65059
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;dlp.srv.world.                 IN      A

;; ANSWER SECTION:
dlp.srv.world.          86400   IN      A       10.0.0.30

;; Query time: 0 msec
;; SERVER: 127.0.0.53#53(127.0.0.53) (UDP)
;; WHEN: Tue Apr 26 07:24:41 UTC 2022
;; MSG SIZE  rcvd: 58


root@dlp:~# dig -x 10.0.0.30

; <<>> DiG 9.18.1-1ubuntu1-Ubuntu <<>> -x 10.0.0.30
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 58625
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;30.0.0.10.in-addr.arpa.                IN      PTR

;; ANSWER SECTION:
30.0.0.10.in-addr.arpa. 86400   IN      PTR     dlp.srv.world.

;; Query time: 4 msec
;; SERVER: 127.0.0.53#53(127.0.0.53) (UDP)
;; WHEN: Tue Apr 26 07:25:22 UTC 2022
;; MSG SIZE  rcvd: 78