Ao tentar acessar com ssh pelo ansible mostra essa mensagem.
$ ansible wordpress -u vagrant --private-key .vagrant/machines/wordpress/virtualbox/private_key -i hosts -m shell -a 'echo Hello, World'
192.168.56.2 | UNREACHABLE! => {
"changed": false,
"msg": "Failed to connect to the host via ssh: ssh: connect to host 192.168.56.2 port 22: Protocol not available",
"unreachable": true
}