> For the complete documentation index, see [llms.txt](https://docs.adaptiva.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.adaptiva.com/patch/air-gap/airgap-overview.md).

# Overview: Air Gap

AirGap for OneSite Patch is an add-on that allows you to distribute patches to highly secure, air-gapped environments (network isolated) using a secure provisioning process.

![Air-gapped server diagram](/files/B9ExyA9bCeH20tXRD97k)

This process involves syncing paired servers, an air-gapped Patch server in your isolated network and an online Patch server connected to the Internet. The air-gapped server builds a software inventory from devices in an isolated network and requests a patch payload from the online server. This request is physically conveyed to the online server, which downloads the relevant patches and compiles a payload. The payload is then physically conveyed to the air-gapped server for distribution to clients.

## Requirements

AirGap is designed to be used in a highly secure environment, and therefore, only works with the Adaptiva on-prem solution. It is not available in our SaaS product. Currently, we only support Windows OS and 3rd party apps for deployment.

An air-gapped Patch environment needs two servers:

* An online Patch server, capable of downloading patches.
* An air-gapped server that stays in isolation.

Additionally, you will need some sort of physical media to transport .txt and .zip files between the servers.

Each Patch server must [install the OneSite Platform](https://docs.adaptiva.com/platform-install/server-install/install-platform) and then license **OneSite Patch** and the **AirGap for OneSite Patch** add-on. The OneSite Platform build versions must be the same on both servers.

The configuration of the servers must be done by a Super Admin on each server (you can configure this user during installation).

## Zones

Once deployed, the platform can support multiple air-gapped environments as "zones," each managed centrally from the online server. This allows administrators to maintain consistent oversight while tailoring patch distribution to the needs of separate secure environments.

## Related Topics

* [Install AirGap](/patch/air-gap/install-airgap.md)
* [Best Practices for AirGap](/patch/air-gap/use-airgap.md)