Author Topic: Zentyal DNS Module Crashing - non-improving referral  (Read 260 times)

acte28

  • Zen Apprentice
  • *
  • Posts: 1
  • Karma: +0/-0
    • View Profile
Zentyal DNS Module Crashing - non-improving referral
« on: July 09, 2022, 10:47:24 pm »
Hi,

We run a Zentyal in our environment, and many machines rely on the built-in Zentyal DNS server, which has a forwarder set up, to our router's DNS server.

On occasion, Zentyal DNS server will stop responding entirely and is solved by restarting the DNS module within the Zentyal admin page. Our Zentyal config is very vanilla with no customization.

The /var/log/syslog file shows errors messages like this, often many times per minute. Despite this appearing in the log file, clients are able to resolve IPs, both internally and externally.

Code: [Select]
Jul 10 05:37:28 vm1zentyal named[1313624]: DNS format error from 10.0.0.1#53 resolving adppa-jarvis-external-alb-1673348206.us-east-1.elb.amazonaws.com/AAAA for client 10.0.3.57#41744: non-improving referral

Querying Google DNS:
Code: [Select]
dig google.com @8.8.8.8

; <<>> DiG 9.16.1-Ubuntu <<>> google.com @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 7600
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;google.com.                    IN      A

;; ANSWER SECTION:
google.com.             251     IN      A       142.250.207.14

;; Query time: 0 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Sun Jul 10 05:43:19 JST 2022
;; MSG SIZE  rcvd: 55

Querying our DNS server
Code: [Select]
dig google.com

; <<>> DiG 9.16.1-Ubuntu <<>> google.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15665
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
; COOKIE: 7df245b0d28f16910100000062c9e8884cec11ffa3d1d687 (good)
;; QUESTION SECTION:
;google.com.                    IN      A

;; ANSWER SECTION:
google.com.             41      IN      A       142.250.196.110

;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sun Jul 10 05:43:52 JST 2022
;; MSG SIZE  rcvd: 83


Could someone please help?