I used Bitnami's tool to get a certificate. The tools doesn't show any error. Chrome doesn't show any problem. But someone reported to me that HTTPS is not working, so I tried with Firefox, and it turns out that the TSL certificate was revoked. Why did this happen?
The second question, obviously, is how do I fix the problem? Calling Bitnami's tool has no effect, even if it seems to work. If Let's Encrypt revoked our certificate, this might be expected.
crt.sh | 17458580669 for just dbfrontiers.com, issued on 2025-03-04 and is still valid;
crt.sh | 16989558753 for justwww.dbfrontiers.com, issued on 2025-03-04 too and is also valid;
crt.sh | 17540541909 for justdbfrontiers.com, again, but issued on 2025-03-31 and indeed has been revoked:
Serial Number: 06B03DBAA0277307DE6D2F21F100F39C39C2
Revocation Date: Apr 1 12:19:50 2025 GMT
There is no CRL reason code mentioned in the CRL, so I don't think this certificate was revoked by Let's Encrypt. I don't know for certain, but I think LE would add a reason code if they themselves would revoke a cert.
Now, I have no clue how bncert-tool works, but that first certificate is still valid and could be used, if everything is still available within bncert-tool. If not, just re-issue the cert.
Also, while you're at it, it's probably a good idea to combine dbfrontiers.com and www.dbfrontiers.com into a single certificate.
No clue how you should be able to do all that with bncert-tool though.