Hi,

I bought a server from Hetzner. I can install a fresh Ubuntu image onto it and then can SSH onto it.

If however I force the server to reboot, I can then not get onto it via SSH. I just get 'Connection Refused'.

Has anyone had this before?

I can' say anything about Hetzner, but Connection refused is probably an indication that sshd is not running. Is it enabled? Is it broken? Are there error or other messages?

try ssh with '-vvv' and show us the (anonymized) output.

Hi,

Please see the output below:

OpenSSH_for_Windows_7.7p1, LibreSSL 2.6.5
debug3: Failed to open file:C:/Users/XXXX/.ssh/config error:2
debug3: Failed to open file:C:/ProgramData/ssh/ssh_config error:2
debug2: resolve_canonicalize: hostname 78.46.49.19 is address
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to XX.XX.XX.XX [XX.XX.XX.XX] port 22.
debug3: finish_connect - ERROR: async io completed with error: 10061, io:XXXXXXXXXXXXXXXX
debug1: connect to address XX.XX.XX.XX port 22: Connection refused
ssh: connect to host XX.XX.XX.XX port 22: Connection refused

Hi tshd

A connection refusal usually occurs when a service is not running as per berndbausch's reply.
Alternatively a firewall service may be running a REJECT rule - which may be for your client IP address (because your Windows client is inside a different ISP network)or because Ubuntu defaults to this at install time.
Sorry, I don't know what the default Ubuntu (ufw) firewall rule for port 22 is but it may be just that, that needs fixing. Do you have a Cpanel or other ISP provided "console" connection to this server? You'd have to make the ufw changes via that route I guess.

Take a look at this: https://raspberrypi.stackexchange.co...rom-windows-10
or here: https://ubuntuforums.org/showthread.php?t=2399409
These were some Google results from searching on "async io completed with error: 10061"

Hope this helps.
Alex

I hit this problem today with a completely different cause. A misconfigured profile prevented login at the console or by SSH.