747driver

You first need to create a certificate a explained HERE.

Don't know the format but I use the certificate from Control Panel - Security - Certificate - Action - Export certificate

See my method HERE.

After many hours of trial&error I found the solution. Created a Shared folder with the name ResilioSync. Created a sub-folder with the name cert. Copied cert.pem and privkey.pem (own trusted certificate) into sub-folder cert. Used SSH to get into the Synology. Went to /volume1/@appstore/resiliosync/var In this folder you will find the configuration file sync.conf sudo vi sync.conf Enter password Add the 2 ssl lines as below: "force_https": true, "ssl_certificate" : "/volume1/ResilioSync/cert/cert.pem", "ssl_private_key" : "/volume1/ResilioSync/cert/privkey.pem" }, Save the file and restart (Stop/Start) Sync in the Package Center. Now refresh the Web UI page and the certificate issue should be solved.

@Sandor, do you know how to change this port number on a Synology NAS?

The files in the folders can be sorted on Date/Name/Size and Show Synced files first. Would be nice and it would make sense if the folders themselves could be sorted as well.

Where is the config file located on a Synology NAS running DSM 7? According to THIS page it should be in /usr/local/resiliosync/var/ but unfortunately it does not have a resiliosync folder. I did find a config file in /volume1/@appstore/resiliosync/app but it does not look like the one on THIS page. The reason why I am asking is because I want to add the required lines to use my own trusted certificate.