> 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/1-10-2/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_MQTT_SCHEME`, `CYBUS_MQTT_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_MQTT_SCHEME: mqtts
            CYBUS_MQTT_HOST: 10.11.12.13
            CYBUS_MQTT_PORT: '8883'
            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 %}


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.cybus.io/1-10-2/documentation/agents/installing-agents/using-mutual-tls-for-agents.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.