Ssh: handshake failed

Support
#1

Hi,
I am running the GUI version of duplicacy and trying to add storage (remote synology NAS) over SFTP.

I have created a certificate that I have on the synology and the same one on my machine. The passphrase is correct, because it cries when I have misspelled it.

I get this error while trying to select a Directory:

Failed to create the sftp client: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain

Can someone more skilled than me explain to me what am I doing wrong ? Or at least direct me towards what I could try ?

Thanks

#2

Are you trying to log in using a certificate? This is not supported. Only a private key file can be used.

#3

I have created a SSH key with a passphrase …
Apologies for using a wrong terminology.

#4

You can test the key with ssh in a terminal like this:

ssh -i <key_file> user@server

What is the type of your key, as indicated by the first line of the key file?

You can also look at the log file ~/.duplicacy-web/logs/duplicacy_web.log which may contain more detailed error messages.

#5

Does this " attempted methods [none publickey] " mean that I have an invalid key ?
I followed this tut : How to set up SSH Keys with your Synology NAS (+macOS) | 4K TUTORIAL - YouTube

with the exception of adding a passphrase …

#6

Likely. Again, the best way to figure it out is to run ssh -i key from the command line to verify that the key actually works.

#7

The terminal command ssh’ed me to the Synology successfully (but only on the local LAN). Remote connection via public IP does not work with a port specified.

The log file does not show more than the error message specified above.