[Pdns-users] (bug?) query for an A record with content = 0.0.0.0

[Brian Candler]

On 12/07/2019 22:03, Bryan Fields wrote:
> $ dig 50121.nodes.allstarlink.org @44.98.254.151 if you want to see it fail.

Works for me:

$ dig 50121.nodes.allstarlink.org @44.98.254.151

; <<>> DiG 9.10.6 <<>> 50121.nodes.allstarlink.org @44.98.254.151
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 5602
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1680
;; QUESTION SECTION:
;50121.nodes.allstarlink.org.    IN    A

;; ANSWER SECTION:
50121.nodes.allstarlink.org. 30    IN    A    0.0.0.0


Are you sure you don't have some sort of DNS-inspecting firewall in 
between your dig client and the server?

Can you run tcpdump on the server itself, and see the query and/or response?