CentOS 8
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BIND : Set Alias (CNAME)
2019/10/03
 
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
        2019100302  ;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 9.11.4-P2-RedHat-9.11.4-17.P2.el8_0.1 <<>> ftp.srv.world.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19332
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
; COOKIE: 7a0f1aade74e87fd24193da95d957973e29baf1c655d4777 (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: 1 msec
;; SERVER: 10.0.0.30#53(10.0.0.30)
;; WHEN: Thu Oct 02 21:30:43 JST 2019
;; MSG SIZE  rcvd: 118
Matched Content