Failed to create the sftp client: ssh: subsystem request failed

[bd2f77417f961e523bec]

Can’t log into SFTP storage on new Synology NAS using username and password:

Here’s my storage configuration screen:

When I click on directory to choose the location, I get the following error:

I can log into synology via ssh fine from multiple other machines.

Samba works using hostname synology too.

I have other storages set up fine using SFTP.

I can ping the machine from duplicacy console:

Not sure what this error is, how to see more verbose output or why it can’t connect via SSH?

Duplicacy docker logs gives the following:

There is no ssh command available in docker console so I can’t troubleshoot like that.

[fronesis]

(post deleted by author)

[saspus]

It’s a well known Synology bug, one of many issues of those retched devices.

SFTP issues with Synology

I’ve tried to my Synology SFTP server as a backup storage. However I seem to get a lot of intermittent errors. The logs all read like this: 019-09-16 22:06:27.166 WARN SFTP_RETRY Encountered an error (EOF); retry after 1 second(s) 2019-09-16 22:06:28.507 WARN SFTP_RETRY Encountered an error (EOF); retry after 2 second(s) 2019-09-16 22:06:30.853 WARN SFTP_RETRY Encountered an error (EOF); retry after 4 second(s) 2019-09-16 22:06:35.198 WARN SFTP_RETRY Encountered an error (EOF); retry after 8 se…

Chunk uploading error with Synology

This is a Synology issue. They run a modified version of ssh server so its behavior is kind of non-stardard/weird. My proof is that if sftp://server/Backups/duplicacy were the wrong path, you would have gotten an error when trying to download the config file before getting to the chunk uploading step. The chunk uploading error you got indicated that Duplicacy had already successfully downloaded the config file and the last snapshot, so the path must be right. The error itself I suspect was c…

I recommend don’t rely on Synology’s SFTP, use SMB backend instead.

[bd2f77417f961e523bec]

It wasn’t actually a bug in the end. It was that for some crazy reason the SFTP settings are not under ssh in Control Panel but rather under FTP

Still would be nice to be able to troubleshoot ssh issues with verbose output.

[saspus]

You still want to read those threads and make recommended changes to prevent issues down the road.