My domain is: strafebink.io
I ran this command: certbot certonly --config "/etc/letsencrypt.ini" --cert-name "npm-10" --agree-tos --authenticator webroot --email "contact@REDACTED.com.au" --preferred-challenges "dns,http" --domains "vaultwarden.strafebink.io"
It produced this output: See attached log output
My web server is (include version): Unknown
The operating system my web server runs on is (include version): Unraid
My hosting provider, if applicable, is: N/A
I can login to a root shell on my machine (yes or no, or I don't know): Yes
The version of my client is (e.g. output of
certbot --version or
certbot-auto --version if you're using Certbot): certbot._internal.main:certbot version: 1.21.0
log.txt (21.0 KB)
Welcome to the forum @StrafeBink
You are using Cloudflare CDN and looks like Cloudflare got a certificate for you. See here. They used Let's Encrypt to issue this cert.
That certificate is used for connections between a client (like a browser) and the Cloudflare edge. This is working fine with https and is secure. You have a problem between your server and the Cloudflare edge which explains the 502 Gateway error you see. You should probably setup a Cloudflare Origin CA certificate for use between your server and Cloudflare. This will be easier than using certbot to create one for that purpose.
Here is some more background on Cloudflare's Origin CA
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