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Connection Issues

Troubleshoot SSH connection problems.

Connection Timeout

Symptoms: Connection hangs and eventually times out.

Possible Causes

  • Device is unreachable (network issue)
  • Firewall blocking port 22
  • Wrong IP address or hostname

Solutions

  1. Verify device is reachable: ping <device-ip>
  2. Check firewall rules allow SSH
  3. Verify correct port (may not be 22)
  4. Increase connection timeout in session settings

Connection Refused

Symptoms: Immediate "connection refused" error.

Possible Causes

  • SSH service not running on device
  • Wrong port number
  • Access control list blocking your IP

Solutions

  1. Verify SSH is enabled on the device
  2. Check the correct port is configured
  3. Verify your IP is allowed in device ACLs

Key Exchange Failures

Symptoms: "No matching key exchange method" or similar.

Possible Causes

  • Old device with outdated SSH algorithms
  • Algorithm mismatch between client and server

Solutions

  1. Enable Legacy Mode in session settings
  2. This enables older, less secure algorithms for compatibility
Warning

Legacy mode uses weaker encryption. Only use for devices that don't support modern algorithms.