Ssh_exchange_identification: Connection closed by remote host

[Wes]

[E] error while initializing command RuntimeError Unable to create directory on remote system /var/tmp/foreman-ssh-cmd-XXXX exit code: 255

There’s Administer > Settings > Remote Execution > Connect by IP. Alternatively you can set remote_execution_connect_by_ip to true as a parameter on host or hostgroup level.

You may be having DNS resolution issues and could try this to troubleshoot that.

Also, the solution to a problem that sounds very much like the one you’re experiencing is here.

All remote execution jobs fail immediately with exception

So basically, there are two solutions to this problem: set ProxyCommand=none in /usr/share/foreman-proxy/.ssh/config for foreman-proxy Put the ProxyCommand into a Match block in /etc/ssh/ssh_config Match exec true ProxyCommand /usr/bin/sss_ssh_knownhostsproxy -p %p %h That means: if it can run /bin/true with an exit code 0 it uses the ProxyCommand. Otherwise not. So that’s a system-wide solution for all users which don’t have a shell set.