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I'm using dnsmasq 2.80 on ubuntu 20.04. In the configuration I set hostsdir, the files in this directory are read automatically.

If I change the IP of a host and checks the IP with the dig command, I get 2 A records, the new and the old one. If I change the IP again, I get 3 A records and so on ...

Example of the dig command:


; <<>> DiG 9.10.6 <<>> ddns.mydomain.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6174
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;ddns.mydomain.com. IN  A

;; ANSWER SECTION:
ddns.mydomain.com. 0 IN A   10.8.0.105
ddns.mydomain.com. 0 IN A   10.8.0.104
ddns.mydomain.com. 0 IN A   10.8.0.102

How can i avoid the duplication of A records for the same host?

Every hint is welcome.

3
  • Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking.
    – Community Bot
    Commented Oct 15, 2022 at 10:57
  • Strange that all 3 records have a TTL of zero.
    – Kate
    Commented Oct 19, 2022 at 15:50
  • @Kate TTL of zero is ok, that's the default behaviour of dnsmasq. Commented Oct 20, 2022 at 15:17

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