This how-to has been tested using a Synology DS214play nas with DSM 6.X and Syncthing v1.1.4.
Default Synology certificate and private key (e.g., released by Let's Encrypt) at this path:
/usr/syno/etc/certificate/system/default/{cert.pem|privkey.pem}
.
After installing Syncthing using synocommunity.com repository, its self-signed certificate will be at this path:
/volume1/@appstore/syncthing/var/
. This directory contains the priv-pub key to identify the device (cert.pem
and key.pem
) and the certificate and private key for the web interface (https_cert.pem
and https_key.pem
). We need to replace these last two with the Synology's ones.
Backup Syncthing certificate: