[Solved] How to set up rsync server for encrypted transfers

[Jocko]

Hi

I checked the package sent previously to fix your issue and all changes are also present on version 18.3 but on version 18.3, how cron jobs are handled and also how it is built the temporary rsyncd server over ssh.

So try to create a new crom job and see if it runs nicely

[esousra]

Hi Jocko,

Not sure I understand what you mean. I am not scheduling the back with cron jobs; I have nothing configured on the Cron Scheduler.

I trigger the backup manually from my Seagate 2big NAS. But after a couple of seconds it fails immediately with message: "Failed to start the backup job. Possible reasons are: incorrect user name or password; unknown destination; or, incorrect access rights for the destination."

And on the Rsync Log file, I get:

Code: Select all

[ssh] 2026/01/20 22:09:41 [2295] rsync: [Receiver] setgid 0 failed: Operation not permitted (1)

Similarly, if I try to configure a new connection:

Screenshot 2026-01-20 222134.png

It fails to list the directory:

Screenshot 2026-01-20 222309.png

I saw in this post history that I had got this "Unknown folder error" before, and you had then suggested to add that symbolic link. I checked and it was gone after the upgrade, so I added it again:

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$ ls -la /usr/bin/ssh
ls: /usr/bin/ssh: No such file or directory
$ su root
Password:
/share/1100/Backup/Backup_Backup/Backup # ln -s /usr/bin/dbclient /usr/bin/ssh
/share/1100/Backup/Backup_Backup/Backup # ls -la /usr/bin/ssh
lrwxrwxrwx  1 root root 17 2026-01-20 22:09 /usr/bin/ssh -> /usr/bin/dbclient
/share/1100/Backup/Backup_Backup/Backup # exit
$ ls -la /usr/bin/ssh
lrwxrwxrwx  1 root root 17 2026-01-20 22:09 /usr/bin/ssh -> /usr/bin/dbclient
$


Tried rebooting it, but didn't help, still same errors...

[esousra]

Another interesting fact is that whether I enter the correct, or a wrong password for rsyncd in Seagate screen to add new backup, I always get same "Unknown folder error".

If I SSH to it with PuTTY, I can login with rsyncd...