BIND : Set Alias (CNAME)2021/07/23

	If you'd like to set Alias (Another Name) to a Host, set CNAME record in a zone file.
[1]	Set CNAME record in a zone file.

[root@dlp ~]#

vi /var/named/srv.world.lan

$TTL 86400
@   IN  SOA     dlp.srv.world. root.srv.world. (
        # update serial if update zone file
        2021072302  ;Serial
        3600        ;Refresh
        1800        ;Retry
        604800      ;Expire
        86400       ;Minimum TTL
)
        IN  NS      dlp.srv.world.
        IN  A       10.0.0.30
        IN  MX 10   dlp.srv.world.

dlp     IN  A       10.0.0.30
www     IN  A       10.0.0.31

# [Alias] IN CNAME [Original Name]
ftp     IN  CNAME   dlp.srv.world.

[root@dlp ~]#

rndc reload

server reload successful

# verify resolution

[root@dlp ~]#

dig ftp.srv.world.


; <<>> DiG 9.11.26-RedHat-9.11.26-4.el8_4 <<>> ftp.srv.world.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 47554
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: d5b85bcb9cfe72ad3c6879bb60fa283ba44f5100d84176ff (good)
;; QUESTION SECTION:
;ftp.srv.world.                 IN      A

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

;; AUTHORITY SECTION:
srv.world.              86400   IN      NS      dlp.srv.world.

;; Query time: 0 msec
;; SERVER: 10.0.0.30#53(10.0.0.30)
;; WHEN: Fri Jul 23 11:23:55 JST 2021
;; MSG SIZE  rcvd: 118

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