Troubleshooting of SSH errors

How to resolve the Network error: Connection timed out[edit]

Error message: Network error: Connection timed out

Solutions:

Check the IP setting of destination server
Check the firewall issue of destination server
Switch to different ISP (Internet Service Provider). The connection maybe was blocked by the MIS.

Verify the connection by key in the command telnet <IP> <SSH PORT>

-- Condition 1: Operation timed out

$ telnet x.x.x.x 22
Trying x.x.x.x...
telnet: connect to address x.x.x.x: Operation timed out
telnet: Unable to connect to remote host

-- Condition 2: Connected successfully

telnet x.x.x.x 22
Trying x.x.x.x...
Connected to x.x.x.x.
Escape character is '^]'.
SSH-2.0-OpenSSH_7.4

(press ctrl+c to leave the console)
^C

Further reading