Interesting, because the server in question does not respond for me too
dig gives me
; <<>> DiG 9.16.12 <<>> https://na.cdn.proxmox.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51775
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0...