My domain is: zostrov.com (148.251.236.201)
I ran this command:
curl -I https://acme-v02.api.letsencrypt.org/
It produced this output:
curl: (7) Failed to connect to acme-v02.api.letsencrypt.org port 443: Connection timed out
I ran this command:
curl -I https://www.whitehouse.gov/
It produced this output:
HTTP/2 200
x-build-back-better: https://usds.gov/
x-frame-options: DENY
referrer-policy: strict-origin-when-cross-origin
x-xss-protection: 1; mode=block
x-content-type-options: nosniff
content-type: text/html; charset=UTF-8
date: Mon, 01 Feb 2021 19:15:32 GMT
strict-transport-security: max-age=31536000 ; includeSubDomains ; preload
I ran this command:
mtr -s 1000 -r -c 1000 acme-v02.api.letsencrypt.org
It produced this output:
HOST: onedesign Loss% Snt Last Avg Best Wrst StDev
1.|-- 2a01:4f8::a:20:a 0.3% 1000 0.9 0.9 0.5 21.3 1.0
2.|-- core24.fsn1.hetzner.com 35.5% 1000 1.2 7.5 0.8 56.4 10.0
3.|-- core5.fra.hetzner.com 0.2% 1000 9.4 6.8 4.9 48.1 4.4
4.|-- 2a01:4f8:0:3::319 0.0% 1000 5.8 6.8 5.2 46.7 3.7
5.|-- 2400:cb00:71:2:2:4940:: 0.0% 1000 20.3 8.7 6.3 53.6 5.1
6.|-- ??? 100.0 1000 0.0 0.0 0.0 0.0 0.0
I ran this command:
traceroute acme-v02.api.letsencrypt.org
It produced this output:
1 static.81.38.251.148.clients.your-server.de (148.251.38.81) 0.292 ms 0.269 ms 0.251 ms
2 * * core23.fsn1.hetzner.com (213.239.203.141) 2.369 ms
3 core0.fra.hetzner.com (213.239.252.37) 4.817 ms * *
4 core9.fra.hetzner.com (213.239.224.174) 5.561 ms 5.568 ms 5.488 ms
5 * * *
6 * * *
7 * * *
8 * * *
9 * * *
10 * * *
11 * * *
12 * * *
13 * * *
14 * * *
15 * * *
16 * * *
17 * * *
18 * * *
19 * * *
20 * * *
My web server is (include version):
nginx 1.12.2
The operating system my web server runs on is (include version):
Debian 9
My hosting provider, if applicable, is:
Hetzner.de
I can login to a root shell on my machine (yes or no, or I don't know):
Yes
I'm using a control panel to manage my site (no, or provide the name and version of the control panel):
ISPmanager Lite 5 + SSH/FTP
The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot):
acme-tiny
Hetzner Support team says that problem in Cloudflare.
I don't use it, so don't understand what should I do next...
I have another server at Hetzner - everything is OK there.
Looks that IP is blocked?
