problem solved by installing a free Let's encrypt certificate
i have tried adding my self signed synology to get webdavs working correctly on the new build 8.90.005
However, it is warning me: CCurlFile::Exists - Failed: Peer certificate cannot be authenticated with given CA certificates(60)
So i tried installing certificates. My Synology nas gives me two certificates: synology-ca-cert.pem and cert.pem
I have tried copying the synology-ca-cert to the /storage/.config/cacert.pem but that lead to this error:
CCurlFile::Exists - Failed: SSL peer certificate or SSH remote key was not OK(51)
The certificate is one signed by synology. ( i connect via a xxxxx.synology.me name)
Any idea why this might not be working?
remark: would it be helpul to once connect to the host via SSL?
That would ask for the ECDSA key fingerprint and will add it to the list of known hosts.