> ## Documentation Index
> Fetch the complete documentation index at: https://docs.futurex.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Before you start

> Pre-implementation checklist verifying environment compatibility and requirements.

Verify your environment meets these requirements.

## Supported hardware

* KMES Series 3, application version 6.3.1.x or later, with initial setup completed (including loading a Platform Master Key and network configuration).

## Supported operating systems

* To configure OpenVPN's Access Server:
  * Linux
    * **Ubuntu** **22.04** and **24.04** (**20.04** not supported in OpenVPN 3.0.0+)
    * **Debian** **11** and **12**
    * **Red Hat Enterprise Linux 8** and **9**
* To use OpenVPN's Connect v3:
  * **macOS Catalina**, **Big Sur**, **Monterey**, **Ventura**, **Sonoma**, and **Sequoia**
  * **Windows 10** and **11**

## Required access

* Local administrator/root access on the computer where OpenVPN Access Server is installed.

## Network and firewall

* Allow outbound TCP port **2001**(default Host API port) from the computers running OpenVPN Access Server and OpenVPN Connect to the KMES Series 3, specified by FQDN (for example, `kmes.example.com`) or CIDR (for example, `10.0.0.0/24`).

<Warning>
  TLS inspection or SSL proxies can break mutual TLS handshakes. Exempt the KMES FQDN(s) from inspection. Configure the KMES Series 3 with a FQDN so the exemption applies.
</Warning>

## Other

* OpenSSL (version 3.x or newer)
* pkcs11-tool (found under `opensc` in Linux Package Manager)
* OpenVPN Access Server ([**Linux VPN Server: Installation and Setup for OpenVPN**](https://openvpn.net/as-docs/get---install-for-linux.html##))
* Python 3.6 and newer installed on the device configuring OpenVPN Access Server

[**uri2pem.py script**](https://github.com/latchset/pkcs11-provider/blob/main/tools/uri2pem.py)

* Python library `asn1crypto`