I don't have a website, I'm trying to set up a Reverse Proxy on my Synology DS920, I did this only last week, I had a few issues with the above error but finally got the certificate installed when I'd got the notation correct, and CName's all setup, spare1.cravennet.co.uk being one example
Sadly, by NAS died on Tuesday following a power outage during a RAID rebuild after a drive replacement, then DSM reinstalled itself and the last system config backup was before I'd configured the certificate and reverse proxy! So i've lost that certificate
I'm getting this error again and my router firewall config hasn't changed, but before I troubleshoot any further, I just wanted to rule out a note on the setup wizard that according to Lets Encrypt policies the number of email addresses for certificate registration and the number of certificate requests for a domain are both limited...... Could this be my issue, since I only did it last week?
@rg305 I was thinking this morning, is it possible for me to download the certificate I created on the 21st, so I can just import it manually, rather than creating a new one? Seems a shame to duplicate...
Only if you still have the private key for it.
Certificates are public information; And without their private key, they are incomplete.
There is nowhere to download the private key from.
Since you lost the data on that drive (including the private key), you must now issue a new cert/key pair.