BIND : Verify Resolution2021/11/09

[1]	Start and Enable BIND.

[root@dlp ~]#

systemctl enable --now named

[2]	If Firewalld is running, allow DNS service. DNS uses [53/TCP,UDP].

[root@dlp ~]#

firewall-cmd --add-service=dns

success
[root@dlp ~]#

firewall-cmd --runtime-to-permanent

success

[3]	Change DNS setting to refer to own DNS if need. (replace [enp1s0] to your own environment).

[root@dlp ~]#

nmcli connection modify enp1s0 ipv4.dns 10.0.0.30

[root@dlp ~]#

nmcli connection down enp1s0; nmcli connection up enp1s0

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

[root@dlp ~]#

dig dlp.srv.world.


; <<>> DiG 9.16.22-RH <<>> dlp.srv.world.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 49661
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: dfa3f5cee693b548010000006189b47fd276e33a7ce318ef (good)
;; QUESTION SECTION:
;dlp.srv.world.                 IN      A

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

;; Query time: 2 msec
;; SERVER: 10.0.0.30#53(10.0.0.30)
;; WHEN: Tue Nov 09 08:36:31 JST 2021
;; MSG SIZE  rcvd: 86

[root@dlp ~]#

dig -x 10.0.0.30


; <<>> DiG 9.16.22-RH <<>> -x 10.0.0.30
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 40024
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: 7fa0458fcfcb227e010000006189b4a41afc0733b0cca9e3 (good)
;; 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: 10.0.0.30#53(10.0.0.30)
;; WHEN: Tue Nov 09 08:37:08 JST 2021
;; MSG SIZE  rcvd: 106

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