My domain is: delta-tech.com
I ran this command: certbot renew -v --dry-run --debug-challenges
It produced this output:
Certbot failed to authenticate some domains (authenticator: webroot). The Certificate Authority reported these problems:
Domain: imap.delta-tech.com
Type: connection
Detail: During secondary validation: 216.82.57.6: Fetching http://imap.delta-tech.com/.well-known/acme-challenge/9xCmTWR9VnHGQ4dtSnFHLd4K1UY5FSS93t3ZmkRH_Yg: Timeout during connect (likely firewall problem)
Domain: mail01.delta-tech.com
Type: connection
Detail: During secondary validation: 216.82.57.6: Fetching http://mail01.delta-tech.com/.well-known/acme-challenge/XNzEMZsJjpWnckA_YrWrI42VY3nV73oOaxdF5AhPWJE: Timeout during connect (likely firewall problem)
Domain: smtp.delta-tech.com
Type: connection
Detail: During secondary validation: 216.82.57.6: Fetching http://smtp.delta-tech.com/.well-known/acme-challenge/ql9ZCHHCbmdlvuPxjhfgC9JkNn7hMA_9Gy9Zv5fIR8M: Timeout during connect (likely firewall problem)
Domain: webmail.delta-tech.com
Type: connection
Detail: During secondary validation: 216.82.57.6: Fetching http://webmail.delta-tech.com/.well-known/acme-challenge/vvMbzJZ8Vsqx7vFTOCHFQnmCKMp19jOxUN4rEI7kJrM: Timeout during connect (likely firewall problem)
My web server is (include version): Nginx 1.18.0
The operating system my web server runs on is (include version): Ubuntu Server 22.04.5
My hosting provider, if applicable, is: Self Hosted
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 1.21.0
I have a Letsencrypt certificate that is securing my email and webmail services. I have setup a cron script to automatically renew the certificate via HTTP (HTTP is redirected to HTTPS). Unfortunately, the renewal is failing secondary validation. I have done the following to troubleshoot the problem:
- Verified that the http://mydomain/.well-known/acme-challenge is accessible
$ echo 'test' > /var/www/html/.well-known/acme-challenge/test.html
$ wget -v http://webmail.delta-tech.com/.well-known/acme-challenge/test.html
--2024-10-03 09:49:05-- http://webmail.delta-tech.com/.well-known/acme-challenge/test.html
Resolving webmail.delta-tech.com (webmail.delta-tech.com)... 192.168.100.4
Connecting to webmail.delta-tech.com (webmail.delta-tech.com)|192.168.100.4|:80... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: https://webmail.delta-tech.com/.well-known/acme-challenge/test.html [following]
--2024-10-03 09:49:05-- https://webmail.delta-tech.com/.well-known/acme-challenge/test.html
Connecting to webmail.delta-tech.com (webmail.delta-tech.com)|192.168.100.4|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 5 [text/html]
Saving to: ‘test.html.1’
test.html.1 100%[=====================================================================================================>] 5 --.-KB/s in 0s
2024-10-03 09:49:05 (3.40 MB/s) - ‘test.html.1’ saved [5/5]
- Verified that certbot is creating challenge files in the correct directory by running the following in two different terminals:
Terminal 1:
certbot renew --dry-run --debug
When the above command is run, I can see the challenge files being created in the correct directory.
Terminal 2:
very 0.5: ls -al /var/www/html/.well-known/acme-challenge mta01: Thu Oct 3 10:22:17 2024
total 32
-rw-r--r-- 1 root root 87 Oct 3 10:22 -95p7GpqkfO2Vl8PsddHLhzPhrDy8Y9W4QSDXSsJSkg
drwxr-xr-x 2 www-data www-data 7 Oct 3 10:22 .
drwxr-xr-x 3 www-data www-data 3 Sep 30 15:42 ..
-rw-r--r-- 1 root root 87 Oct 3 10:22 RxnzuHMeRs0gBd0J15E3__v3-6bNuzzbZv1Evu7ggz0
-rw-r--r-- 1 root root 87 Oct 3 10:22 mqc2s_lbgPTEun7CnQ3hOxxAdBExRzRkbYGIvW4bKp4
-rw-r--r-- 1 root root 5 Oct 2 17:50 test.html
-rw-r--r-- 1 root root 87 Oct 3 10:22 uW17sSv2ATLHoqFW-nxIGAwmQmKAkImtnbZud6w_N0U
At this point, I am not sure what to troubleshoot next. After all the challenge files are being created in the correct directory and are accessible via HTTP (with HTTPS redirection) at the correct URL. I have also verified that it is not a file permission problem. Any help fixing this problem would be greatly appreciated.