Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. https://crt.sh/?q=example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.
My domain is: haphuongle.com
I ran this command: sudo letsencrypt certonly -a manual --rsa-key-size 4096 --email "my email" -d haphuongle.comy
It produced this output:
Waiting for verification...
Cleaning up challenges
Failed authorization procedure. haphuongle.com (http-01): urn:ietf:params:acme:error:connection :: The server could not connect to the client to verify the domain :: Fetching http://haphuongle.com/.well-known/acme-challenge/MP-4GcSlYdYqjtrlRqg1_WNHG9g_1yxHj8lGpROgtT8: Timeout during connect (likely firewall problem)
The following errors were reported by the server:
Timeout during connect (likely firewall problem)
To fix these errors, please make sure that your domain name was
entered correctly and the DNS A/AAAA record(s) for that domain
contain(s) the right IP address. Additionally, please check that
your computer has a publicly routable IP address and that no
firewalls are preventing the server from communicating with the
client. If you're using the webroot plugin, you should also verify
that you are serving files from the webroot path you provided.
My web server is (include version): nginx/1.14.2
The operating system my web server runs on is (include version):
PRETTY_NAME="Raspbian GNU/Linux 10 (buster)"
My hosting provider, if applicable, is: Linux version 5.4.51-v7l+
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): no
The version of my client is (e.g. output of
certbot --version or
certbot-auto --version if you're using Certbot): certbot 0.31.0
I'm super new to web development and stuff so please be patient if I ask too much. Thank you