Why ssh connection refused if port is open?

Question

SSH

Here are open ports, ssh is apparently open
But when connecting, it gives
ssh [email protected]{host}
ssh: connect to host {host} port 22: Connection refused

Ubuntu 18.04, DigitalOcean
How can this be fixed?

Answer 1

Try
ssh -vvv [email protected]{host}
Maybe a key is required.
Or maybe the firewall won't let you in.

Answer 2

And it also happens that you actually connect to another machine. Errors in DNS or duplicate IP

Answer 3

The port on the host is open, but traffic may be blocked by a local firewall or non-local one.
"Connection refused" usually means that there is no connection to the server. Communication may not be for various reasons. Ports are just one of them.