> For the complete documentation index, see [llms.txt](https://documentation.nomos-system.com/nomos-system/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://documentation.nomos-system.com/nomos-system/integrator-en/administration/support-vpn.md).

# Support VPN

With the Support VPN your technical support — for example your integrator or the nomos system support team — gains remote access to this controller, for instance for troubleshooting, remote programming or ongoing maintenance. You stay in control at all times: access is only possible while you have the Support VPN enabled.

{% hint style="info" %}
The Support VPN gives your support access on demand by sharing the displayed IP address. For permanent access via your own VPN clients, use the [Direct VPN](/nomos-system/integrator-en/administration/vpn.md).
{% endhint %}

## Enabling the Support VPN

1. Click **"On"** at the top right. The status first changes to **"Connecting…"**.
2. Once the connection is up, the banner shows **"VPN active"** together with the assigned **IP Address**.
3. Share this **IP Address** with your support contact. Only then can the support team access the controller.

## Exposing a Device for Support

Using **"Expose local device to VPN"** you make a specific device from your network (for example a KNX interface) reachable for support. This way support accesses exactly the devices needed — and no others.

{% hint style="success" %}
**You stay in control.** You decide when the Support VPN is active and which devices are shared. Once the work is finished, simply turn it off again.
{% endhint %}

<figure><img src="/files/wGQKI2qRGlzB1lGJU0ba" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}
A USB serial adapter connected to the controller can be shared via [USB Serial over VPN](/nomos-system/integrator-en/administration/usb-serial-vpn.md) — for example for remote programming.
{% endhint %}


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