RADIUS Server (NPS) on Windows Server 2025

This solution provides a fully configured RADIUS server using Network Policy Server (NPS) on Windows Server 2025, ideal for secure wireless authentication, VPN, and network access control in Azure environments. NPS centralizes authentication, authorization, and accounting for network connections, supporting integration with on-premises or Azure Active Directory.

RADIUS Server Key Features:

• Centralized authentication and authorization for wireless, VPN, and wired connections
• Seamless integration with Active Directory
• Supports WPA2-Enterprise, WPA-Enterprise, AES/TKIP encryption
• 802.1X authentication for enterprise-grade security
• Machine and user certificate authentication (EAP-TLS, PEAP-MS-CHAP v2)
• Granular network policies based on AD group, device, or location
• RADIUS accounting with logging to local disk or SQL Server
• Unlimited RADIUS clients and remote RADIUS server groups
• Single sign-on for users and devices
• Configurable IP address ranges for RADIUS clients
• Role-based access control and multi-factor authentication support
• High availability and scalability in Azure (VM scale sets, load balancing)
• Compliant with IETF RADIUS standards (RFCs 2865, 2866)

RADIUS on Azure Use Cases

• Secure wireless authentication for Azure-hosted enterprise networks
• VPN gateway authentication for remote users and branch offices
• Hybrid cloud scenarios: extend on-premises RADIUS/NPS to Azure
• Network access control for Azure VMs, virtual desktops, and remote apps
• Multi-site authentication with Azure AD DS and on-prem AD
• Centralized logging and monitoring with Azure Monitor and Sentinel
• Scalable RADIUS infrastructure using Azure VM scale sets
• Disaster recovery and high availability with Azure backup and geo-redundancy

Support & Documentation

For post-install configuration and best practices, see: How to setup RADIUS for Wireless Authentication