> 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/jp/supported-protocols/connecting-to-host-instance.md).

# ホストインスタンスへの接続

Dockerインストール環境では、**host.docker.internal**という特殊なホスト名を使用して、Keeper Connection Managerホストインスタンスへの接続を確立できます。

設定するには、以下のように、`/etc/kcm-setup/docker-compose.yml`ファイルの**guacd**セクションを更新して、「`extra_hosts`」パラメータを追加します。

```
    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"

```

Docker環境を更新して、変更を反映させます。

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

すると、Keeper Connection Manager内から、`host.docker.internal`というホスト名を参照する新しい接続を作成できます。

<figure><img src="/files/O4XHNha00Ei2RzceVmM3" alt=""><figcaption><p>KCMホストインスタンスへの接続</p></figcaption></figure>

詳細については、以下の記事をご参照ください。

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


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