Why do I get "connection timed out" when I ssh into a server?
Cannot connect with ssh to a server: connection timed out
I have always used
ssh to connect to a server, then, suddenly, I can no longer connect to it.
$ ssh email@example.com ssh: connect to host server1.example.com port 22: Operation timed out
Note that this is happening only on a specific server, while I can still connect with ssh to the others.
What can I do?
The reasons can be:
Wrong hostname or IP address
Your local network (e.g. public network) does not allow ssh connections (try to connect to a different server to see if it works)
Firewall rules set in your cloud provider network or a firewall in the remote server may block the connections, dropping all the packets before they reach the ssh daemon
The remote machine is turned off
The remote server is completely stuck and thus it cannot respond to the connection request (check the server CPU and other metrics from hypervisor or from a cloud dashboard and then restart the server)
You can also try to connect to the remote machine with a different method (e.g. from a browser console, offered by many cloud providers) instead of using ssh.