Unable to shutdown or reboot when using step ssh proxycommand

[jodygilbert]

I'm using step-cli 0.22.0 on Windows 10 to connect to various Ubuntu servers. The servers are running Ubuntu 18.04 and 20.04.

I've noticed that if I reboot or shutdown the servers the connection hangs, it appears to be indefinitely but I haven't left it for more than a couple of minutes.

If I do this from a Ubuntu client the reboot works fine.

To get around this I've added the following options to the ssh config file, which forces the client to timeout and disconnect:

ServerAliveInterval 15
ServerAliveCountMax 5

I cannot tell if the issue is with the step client or the ssh client, any suggestions greatly appreciated.

[maraino]

Hi @jodygilbert, I'm able to reproduce this, I will investigate.

[maraino]

The problem seems to be that the workgroup replicating the STDIN does not finish, but the STDOUT does. And when you exit with ctrl-d, both finish. I will move this to an issue in smallstep/cli.

[maraino]

In any case, if I press a key, or perhaps Enter, the connection closes.

[maraino]

smallstep/cli#788

[jodygilbert]

Thanks for the quick response and the suggested workaround, I can stop searching google for fixes in the ssh client.