My domain is: 1373.knightmare.ch. Its certificate will expire on Sept. 13th 2019.
I tried accessing my server from internal network through three different desktop browsers (Safari, Firefox, Chrome), but all of them reported that the certificate got revoked.
I managed to connect to my server with iOS Safari and I could renew the Let’s Encrypt certificate, but apparently the “info” of the new certificate did not reach the servers with OCSP.
The operating system my web server runs on is (include version): Synology DSM 6.2
I can login to a root shell on my machine (yes or no, or I don’t know): no, or only with difficulty on iOS.
I’m using a control panel to manage my site (no, or provide the name and version of the control panel): no, only through the DS finder app in iOS.
Can you please provide me information regarding who/what provoked the certificate revocation?
Can you tell me how to force desktop browsers to accept connections even when a certificate got revoked, furthermore on a local IP network 196.168.x.x?
How much time does it need between certificate renewal and suspension of the information of revocation of the former certificate?
The problem originated indeed from the latest Synology update. I found out that many other Synology server owners suffered the same problem.
To solve the problem, a special step is necessary: not only to update the certificate, but to add and replace the former one.