BIND : Verify Name Resolution2026/04/25

[1]	Restart BIND to apply changes.

root@dlp:~#

systemctl restart named

[2]	If UFW is enabled, allow DNS service. DNS uses [53/TCP,UDP].

root@dlp:~#

ufw allow domain

Rule added
Rule added (v6)

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

root@dlp:~#

vi /etc/netplan/01-netcfg.yaml

# change DNS setting

    nameservers:
        addresses: [10.0.0.30]

root@dlp:~#

netplan apply

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

root@dlp:~#

dig dlp.srv.world.


; <<>> DiG 9.20.18-1ubuntu2-Ubuntu <<>> dlp.srv.world.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 14622
;; flags: qr aa rd ra ad; 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.          0       IN      A       10.0.0.30

;; Query time: 0 msec
;; SERVER: 127.0.0.53#53(127.0.0.53) (UDP)
;; WHEN: Sat Apr 25 04:15:22 UTC 2026
;; MSG SIZE  rcvd: 58

root@dlp:~#

dig -x 10.0.0.30


; <<>> DiG 9.20.18-1ubuntu2-Ubuntu <<>> -x 10.0.0.30
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 20884
;; 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: 0 msec
;; SERVER: 127.0.0.53#53(127.0.0.53) (UDP)
;; WHEN: Sat Apr 25 04:15:59 UTC 2026
;; MSG SIZE  rcvd: 78

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