---
title: Access Server's Features Overview
canonical: https://openvpn.net/as-docs/v3/access-server-features-overview/
product: Access Server Docs
---

# Access Server's Features Overview

## Deployment and compatibility

- **Flexible Deployment Options:** Access Server installs on a Linux OS with flexible installation options to meet the needs of your network, including on virtual machines (e.g., VMWare, Hyper-V, Docker) or cloud platforms (e.g., AWS, Azure, Google Cloud).
- **Multi-Platform Client Support:** Users can connect with clients available for Microsoft Windows, macOS, iOS, Android, and Linux, ensuring broad compatibility across your organization's devices.

## Security and authentication

- **Robust VPN Protocol:** VPN tunnels are secured with the OpenVPN protocol using TLS authentication, credentials, certificates, and MAC address lock (optional).
- **Flexible User Authentication:** Access Server includes a built-in system with a web-based management interface, and it can also integrate with external systems such as PAM, LDAP, RADIUS, or SAML for centralized user management.
- **Multi-Factor Authentication (MFA):** Access Server includes a built-in TOTP MFA system and supports third-party MFA solutions like Duo Security and LastPass using post-authentication plugins.
- **Built-in Certificate Management:** Access Server handles all the complexities of VPN certificate management and provisioning automatically. For organizations that need more control, it also supports external PKI for integration with an existing PKI.
- **Custom Authentication:** For highly customized security needs, Access Server supports advanced authentication through custom programming with Python, allowing you to develop unique authentication workflows.

## Management and control

- **Intuitive Admin Web UI:** Access Server features a new, modern Admin Web UI built with React that offers a smooth and fast experience without the need for full-page reloads, making administrative tasks more efficient.
- **Comprehensive Administrative Tools:** Administrators can manage MFA settings for all users, modify advanced configuration settings, and generate a configuration report for support analysis directly from the Admin Web UI.
- **Enhanced Visibility:** The Admin Web UI provides clear insight, displaying your subscription ID for quick reference and the number of shared connections being used by other Access Server nodes.
- **Granular Access Control:** Detailed access control rules specify which users or groups can access specific IP addresses and subnets, and can also allow or disallow direct VPN client connections.

## Traffic and network routing

- **Flexible Traffic Redirection:** Full-tunnel redirection routes all internet traffic from the VPN client through the VPN tunnel, while split-tunnel redirection routes only specified traffic (e.g., traffic for your corporate network) through the VPN tunnel and allows other traffic to directly reach the internet.

## Integration and automation

- **Extensive Web API:** For developers and IT teams, an extended Web API makes automating workflows and integrations easy, allowing programmatic control of Access Server and its settings.
- **Built-in API Documentation:** To simplify the integration process, the Admin Web UI includes a built-in tester and comprehensive Web API documentation, making it easier than ever to build and maintain custom integrations.

## Support

- **Professional Support:** The OpenVPN, Inc. team provides professional support through an online support ticket system, staffed by a global team of experts to assist with any questions or issues.

## Take a look at the Admin Web UI interface

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Prev: [What is Access Server?](https://openvpn.net/as-docs/v3/what-is-access-server.md)
Next: [How to Sign Up](https://openvpn.net/as-docs/v3/get-started-with-access-server.md)
Index: https://openvpn.net/as-docs/llms.txt