Hello list,

I have made a successful query in one of my VPS as the following.

~$ dig 235.84.36.104.zen.spamhaus.org

; <<>> DiG 9.16.48-Ubuntu <<>> 235.84.36.104.zen.spamhaus.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2160
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;235.84.36.104.zen.spamhaus.org.        IN      A

;; ANSWER SECTION:
235.84.36.104.zen.spamhaus.org. 852 IN  A       127.0.0.10

;; Query time: 0 msec
;; SERVER: 127.0.0.53#53(127.0.0.53)
;; WHEN: Wed Jun 12 02:45:16 UTC 2024
;; MSG SIZE  rcvd: 75



But, the same query wouldn't success in another VPS as follows.

$ dig 235.84.36.104.zen.spamhaus.org

; <<>> DiG 9.16.1-Ubuntu <<>> 235.84.36.104.zen.spamhaus.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 15831
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;235.84.36.104.zen.spamhaus.org.        IN      A

;; Query time: 1 msec
;; SERVER: 127.0.0.53#53(127.0.0.53)
;; WHEN: Wed Jun 12 10:45:41 HKT 2024
;; MSG SIZE  rcvd: 59


The returned result is "NXDOMAIN".

Both nodes use systemd-resolve as DNS subresolver.

Do you know what's the reason behind this?

Thanks.

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