How would you troubleshoot if SSH is not working?

How would you troubleshoot if SSH is not working?

Verify the local network firewall you are connecting through allows the port you are using to connect to SSH. Verify your VPS firewall rules to make sure SSH connections are allowed and aren’t being dropped. Verify the SSH service is running on your VPS. Verify the SSH service is using the correct port.

Why My putty is not working?

1 Answer. Verify which port the server is listening for Putty on. Then, make sure this port is open on your router (if you are not in the same network as the SSH server).

How do I know if my router is blocking SSH?

Here you need to have a PC or server listen to port 22 (default SSH port), and then try to connect to your external IP address, for an other network. If this succeeds then it is open, else it is blocked.

How do you fix PuTTY inactive?

To do this, follow these steps:

1. Start PuTTY.
2. Load your connection session.
3. In the Category pane, click Connection.
4. Under Sending of null packets to keep session active, in the Seconds between keepalives, type 240.
5. In the Category pane, click Session.
6. Click Save.
7. Connect to your account and monitor the connection.

Why is my SSH connection still not working?

If you need to revert this setting later on, just type the same command but with “disable” instead of “enable”. If you are still having connection issues after verifying that the SSH service is up and running, perhaps the SSH connection is being blocked before it even has a chance to reach the system – like on your router.

What should I do if my SSH service is down?

The SSH service needs to be enabled and running in the background. If the service is down, the SSH daemon cannot accept connections. To check the status of the service, enter this command: The output should respond that the service is active. If the terminal responds that the service is down, enable it to resolve the issue.

Why does my SSH server refuse my request?

Type the following command in the terminal window to allow SSH connections: When you attempt a connection to a remote server, SSH sends a request to a specific port. To accept this request, a server needs to have the SSH port open. If the port is closed, the server refuses the connection.

What happens if the SSH daemon is down?

If the service is down, the SSH daemon cannot accept connections. To check the status of the service, enter this command: The output should respond that the service is active. If the terminal responds that the service is down, enable it to resolve the issue.