Basic Troubleshooting

There are some basic troubleshooting steps and basic checks that we can do in case of any issues:

Verify Agent Status

On the VM, run:

sudo systemctl status nessusagent

or

nessuscli agent status

Ensure the agent is running and linked to the correct Nessus Manager.

Restart Agent

On the VM, run:

systemctl restart nessusagent

Review Logs

On the VM, run:

tail -f /opt/nessus_agent/var/nessus/logs/nessus-agent.log

Look for errors like: - Communication issues - Plugin load failures

Confirm Linking

On the VM, run:

nessuscli agent info

Look for: - Linked to: correct Nessus Manager hostname/IP - Status: Connected

If not linked, re-link it again.

Relink Agent

On the VM, run:

nessuscli agent link --key=<linking_key> --host=<manager_host> --port=<manager_port>

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