> For the complete documentation index, see [llms.txt](https://docs.keeper.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.keeper.io/keeper-connection-manager/supported-protocols/connecting-to-host-instance.md).

# Connecting to Host Instance

In a Docker install environment, it's possible to establish a connection to the Keeper Connection Manager host instance using a special host name called **host.docker.internal**.

To configure this, update the file `/etc/kcm-setup/docker-compose.yml` **guacd** section to include the "`extra_hosts`" parameter, as seen below:

```
    guacd:
        image: keeper/guacd:2
        restart: unless-stopped
        environment:
            ACCEPT_EULA: "Y"
        volumes:
            - "common-storage:/var/lib/guacamole:rw"
        extra_hosts:
            - "host.docker.internal:host-gateway"

```

Update the docker environment for the change to take effect.

```
sudo ./kcm-setup.run stop
sudo ./kcm-setup.run upgrade
```

Then, from within Keeper Connection Manager, you can create a new connection which simply references the Hostname of `host.docker.internal`.

![Connecting to the KCM Host Instance](/files/ywFIby1tHuK4o34qcCCo)

For more information, see the below helpful article:

{% embed url="<https://medium.com/@TimvanBaarsen/how-to-connect-to-the-docker-host-from-inside-a-docker-container-112b4c71bc66>" %}


---

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