Find out two pieces of information
- Whats the hostname or IP of the target ssh server
- What port is the ssh daemon listening on (default is port 22)
$> telnet
Assuming the daemon is up and running and listening on that port it should etablish a telnet session. Likely causes:
- The ssh daemon is not running
- The host is blocking the target port with its software firewall
- Some intermediate network device is blocking or filtering the target port
- The ssh daemon is listening on a non standard port
- A TCP wrapper is configured and is filtering out your source host
