SSH key import is the next check when a remote KVM connection fails after the daemon is verified

CV0-003 By islever Editorial Last updated

Given a scenario, troubleshoot connectivity issues.

Short answer

D The daemon runs and login works, so the qemu+ssh failure points to the private key not being properly imported for key-based authentication.

Question

A systems administrator is trying to connect to a remote KVM host. The command line appears as follows: After logging in to the remote server, the administrator verifies the daemon is running. Which of the following should the administrator try NEXT? - Exhibit: SSH key import is the next check when a remote KVM connection fails
  1. Opening port 22 on the firewall
  2. Running the command with elevated privileges
  3. Checking if the SSH password is correct
  4. Ensuring the private key was properly imported Correct Answer

Key Takeaways

A working daemon and a successful login prove port 22 is open and the service is healthy, which eliminates firewall and password theories and points at the SSH key used by the management tool.

The administrator can log in to the remote KVM server and confirms the daemon is running, so reachability and the service are ruled out. For a qemu+ssh remote connection the remaining failure point is key-based authentication, so verifying that the private key was properly imported is the correct next step.

Common mistake: Opening port 22 (A) is the reflex answer, but a blocked port would prevent the login that the scenario already reports as successful, so the firewall cannot be the fault.

Expert Analysis

Why the Answer Is Correct

The scenario states the administrator reached the remote server and verified the daemon is running, so both the network path and the libvirt service are proven good. Remote KVM management typically rides on qemu+ssh, and that transport authenticates with an SSH key pair rather than a password. If the private key was never imported into the local agent or keyfile path, the connection attempt fails exactly as shown even though the server itself is fine, making key verification the logical next action.

Why the Other Options Are Wrong

A, opening port 22, contradicts the facts: a firewalled port would have blocked the login and the daemon check that already succeeded. B, running with elevated privileges, changes nothing because the failure is authentication-based, not a permission error on a local resource. C, checking the SSH password, targets password authentication, but the connection method shown uses key-based authentication, so the password is not part of this session at all.

Community Comment Notes

CXSSP and Rjimbo both reason that a successful login implies port 22 is open, so the fault must lie in key-based authentication, matching option D. WereAllinThisTogether adds that a firewall problem would time out and make the host unreachable rather than produce an error from the device, while a wrong key store or SSH version does exactly that. Pisces225 and AmberTheTamber prefer A on the theory that KVM rides on port 22, but the two higher-endorsed arguments close that door with the successful login.

Official Reference

https://libvirt.org/remote.html

This link opens the official vendor documentation in a new tab.

Community Votes

D
67%
A
33%

67% of anonymous learners picked answer D. Votes are pick records left by other test-takers — they are not the verified answer.

Discussion 5 contributions

Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.

From public community threads 5

  1. CXSSP 👍 3 Answered D
    If the administrator was able to log in to the remote server, it implies that port 22 is open and SSH is functioning correctly. Therefore, the issue is likely not with the firewall settings. Option D, “Ensuring the private key was properly imported”, could indeed be the next step. If the administrator is trying to establish a connection using key-based authentication, any issues with the private key (such as it not being properly imported or not being in the correct location) could prevent the connection.
  2. Rjimbo 👍 2 Answered D
    If the daemon is running and you're able to log in remotely, it's likely that port 22 is already open. If the private key is not correctly imported or configured, the connection attempt could fail, leading to issues such as the daemon not appearing to run correctly. Verifying and ensuring that the private key is correctly imported and configured would address potential authentication issues.
  3. Pisces225 👍 2 Answered A
    22 is the default port for KVM. The rest are possible but unlikely to be the first thing to check.
  4. WereAllinThisTogether 👍 1 Answered D
    It is D. If it was the firewall it would time-out and block the connection so it would be unreachable. An error being generated from the device suggests this is an issue with remote device itself. Not having the right version of SSH or having the key in the wrong key storage would cause this issue.
  5. AmberTheTamber 👍 1 Answered A
    It's A. D would cause an authentication error. A is something I would most likely expect with a connection issue

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