Please help. I cannot generate the certificate for my domain using standalone mode. I've done a test on Letdebug.net and it said that the connection is OK, but when i run certbot still get the Timeout error.
My domain is: chat.campdi.vn
I ran this command:
certbot certonly --standalone --preferred-challenges http --http-01-port 80 -d chat.campdi.vn
It produced this output:
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator standalone, Installer None
Starting new HTTPS connection (1): acme-v02.api.letsencrypt.org
Requesting a certificate for chat.campdi.vn
Performing the following challenges:
http-01 challenge for chat.campdi.vn
Waiting for verification...
Challenge failed for domain chat.campdi.vn
http-01 challenge for chat.campdi.vn
Cleaning up challenges
Some challenges have failed.
IMPORTANT NOTES:
-
The following errors were reported by the server:
Domain: chat.campdi.vn
Type: connection
Detail: During secondary validation: 1.53.141.231: Fetching
http://chat.campdi.vn/.well-known/acme-challenge/PxiFDSK54lNo7h7ILzF0yK7mgxQxjFlIP4riEoi_1Mc:
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): haproxy
The operating system my web server runs on is (include version): centos 7
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):
The version of my client is 1.11.0