BIND : Set Alias (CNAME)2023/02/21

	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
        2023022102  ;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 9.16.23-RH <<>> ftp.srv.world.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10460
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: 37484bef3347a76d0100000061dccfb694487772279a5aca (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

;; Query time: 2 msec
;; SERVER: 10.0.0.30#53(10.0.0.30)
;; WHEN: Tue Jan 11 09:30:46 JST 2022
;; MSG SIZE  rcvd: 104

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