So I have a feeling I'm getting closer to fining issue.
If I run dig @1.1.1.1 +nssearch google.com
I get
;; UDP setup with 2001:4860:4802:36::a#53(2001:4860:4802:36::a) for google.com failed: network unreachable.
;; UDP setup with 2001:4860:4802:32::a#53(2001:4860:4802:32::a) for google.com failed: network unreachable.
;; UDP setup with 2001:4860:4802:34::a#53(2001:4860:4802:34::a) for google.com failed: network unreachable.
;; UDP setup with 2001:4860:4802:38::a#53(2001:4860:4802:38::a) for google.com failed: network unreachable.
SOA ns1.google.com. dns-admin.google.com. 509006591 900 900 1800 60 from server 216.239.36.10 in 20 ms.
SOA ns1.google.com. dns-admin.google.com. 509006591 900 900 1800 60 from server 216.239.38.10 in 23 ms.
SOA ns1.google.com. dns-admin.google.com. 509006591 900 900 1800 60 from server 216.239.32.10 in 40 ms.
SOA ns1.google.com. dns-admin.google.com. 509006591 900 900 1800 60 from server 216.239.34.10 in 50 ms.
Now if I run dig @1.1.1.1 +nssearch serveris.link
;; UDP setup with 2600:9000:5301:9b00::1#53(2600:9000:5301:9b00::1) for serveris.link failed: network unreachable.
;; UDP setup with 2600:9000:5303:fe00::1#53(2600:9000:5303:fe00::1) for serveris.link failed: network unreachable.
;; UDP setup with 2600:9000:5307:2b00::1#53(2600:9000:5307:2b00::1) for serveris.link failed: network unreachable.
;; UDP setup with 2600:9000:5305:b700::1#53(2600:9000:5305:b700::1) for serveris.link failed: network unreachable.
;; communications error to 205.251.197.183#53: timed out
;; communications error to 205.251.193.155#53: timed out
;; communications error to 205.251.199.43#53: timed out
;; communications error to 205.251.195.254#53: timed out
;; NS servers could not be reached
Is this somehow related?
Why does it even need to connect to nameserver? 205.251.197.183:53
I find Traefik container not honouring DNS addresses to resolve ACME challenges · Issue #9588 · traefik/traefik · GitHub and think to myself finally someone else with the same issue. And it gets closed...