Link a Currently-Linked Agent to Sensor Proxy

If you have an agent that is currently linked directly to Tenable Vulnerability Management, you can relink the agent to Sensor Proxy to communicate to the same Tenable Vulnerability Management instance.

Note: You do not need the Tenable Vulnerability Management linking key for this process.

Note: If you have two separate Tenable Vulnerability Management instances, you cannot switch an agent to a different Tenable Vulnerability Management instance using the following procedure. Instead, first unlink the agent from the old instance.

If you have an agent that is linked to Tenable Nessus Manager, you cannot relink to Sensor Proxy directly. Instead, unlink the agent first. After your agent is unlinked, see Link an Unlinked Agent to Sensor Proxy.

Note: Tenable Security Center 6.5 only supports Sensor Proxy linked with Tenable Web App Scanning scanners. Tenable Nessus scanners and Tenable Nessus Agents are currently unsupported. Tenable Vulnerability Management supports Sensor Proxy linked with all sensors except Tenable Web App Scanning scanners.

Before you begin:

Install Sensor Proxy.

To relink an agent that is currently linked to Tenable Vulnerability Management:

Note: If you relink an agent, the agent restarts. For several minutes after relinking, the agent does not perform scan jobs.

On the agent, use the following command.
Copy
```
# nessuscli agent relink --host=<Sensor Proxy IP or hostname> --port=443
```
- For host, use the Sensor Proxy IP address or hostname.
The agent is linked and communicates through Sensor Proxy to Tenable Vulnerability Management.