> For the complete documentation index, see [llms.txt](https://docs.cybus.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cybus.io/2-1-1/documentation/agents/installing-agents/using-mutual-tls-for-agents.md).

# Using Mutual TLS for Agents

You can configure protocol-mapper agents to use mutual TLS (mTLS) for secure communication with Connectware. In the following example setup, the agent connects via MQTT over a secure TLS connection (port 8883), requiring both client and CA certificates for mutual authentication. This approach ensures that both the server and the client verify each other's identities, adding an extra layer of security.

The example shows how to configure environment variables such as `CYBUS_DATAPLANE_SCHEME`, `CYBUS_DATAPLANE_PORT`, and `USE_MUTUAL_TLS`. It also explains how to mount certificates using Docker volumes to ensure secure communication between the agent and the server.

{% code lineNumbers="true" %}

```yaml
version: '2.0'
services:
  protocol-mapper-agent:
    image: registry.cybus.io/cybus/protocol-mapper:${IMAGE_TAG}
    environment:
      CYBUS_AGENT_MODE: distributed
      CYBUS_AGENT_NAME: myAgent
      CYBUS_HOSTNAME_INGRESS: 10.11.12.13
      CYBUS_USE_MUTUAL_TLS: true
    volumes:
      - protocol-mapper-agent:/data
      - /mycerts:/connectware/certs/client
      - /myca:/connectware/certs/ca
    restart: unless-stopped
    network_mode: host
    hostname: <some-suitable-hostname>
volumes:
  protocol-mapper-agent:
```

{% endcode %}


---

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