CentOS Stream 10
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BIND : Verify Name Resolution2024/12/27
 

Start BIND and verify if name or address resolution works fine.

[1] Start 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 up enp1s0

[4] Verify Name and Address Resolution. If [ANSWER SECTION] is shown, that's OK.
[root@dlp ~]#
dig dlp.srv.world. 


; <<>> DiG 9.18.21 <<>> dlp.srv.world.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46887
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: d61ee094f5e5698101000000676e05ac0e14584d59159e93 (good)
;; QUESTION SECTION:
;dlp.srv.world.                 IN      A

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

;; Query time: 0 msec
;; SERVER: 10.0.0.30#53(10.0.0.30) (UDP)
;; WHEN: Fri Dec 27 10:41:00 JST 2024
;; MSG SIZE  rcvd: 86
[root@dlp ~]#
dig -x 10.0.0.30 


; <<>> DiG 9.18.21 <<>> -x 10.0.0.30
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 52974
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: 24ae2d9e7e61decf01000000676e05d2b6f835c7aa141377 (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: 0 msec
;; SERVER: 10.0.0.30#53(10.0.0.30) (UDP)
;; WHEN: Fri Dec 27 10:41:38 JST 2024
;; MSG SIZE  rcvd: 106
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