What troubleshooting steps can I perform to diagnose the 'exhausted available authentication methods' error in DBeaver?

1. **External SSH Test:** First, try connecting to the SSH server using a standard terminal SSH client (e.g., `ssh -i key.pem user@host` or `ssh user@host`) to confirm the server and credentials work outside DBeaver. 2. **DBeaver Log:** Check DBeaver's internal log file (Help -> Show Log File) for more detailed error messages from the SSHJ library. 3. **Server Logs:** Examine SSH server logs (`/var/log/auth.log` or `/var/log/secure`) for specific reasons why your connection attempt was rejected. 4. **Firewall Check:** Ensure no firewalls (local machine, network, or server-side) are blocking the SSH port (default 22).