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Windows Server 2019
A Microsoft server operating system that supports enterprise-level management updated to data storage.
3,457 questions
When configuring a Microsoft VPN server for traffic routing between the server and client, especially in an Always On VPN setup, the routing can be approached in two main configurations: split tunneling and force tunneling. In a split tunnel configuration, specific routes are directed over the VPN while all other traffic uses the physical (local) network interface. This setup is ideal for allowing access to internal resources without routing all the client's internet traffic through the VPN, thus reducing bandwidth on the VPN server. Routes can be defined using the VPNv2 configuration service provider (CSP), allowing for detailed control over which traffic goes through the VPN. https://learn.microsoft.com/en-us/windows/security/operating-system-security/network-security/vpn/vpn-routing Force tunneling, on the other hand, routes all client traffic through the VPN. This approach is often used for enhanced security, ensuring that all client traffic is inspected and filtered according to the organization's policies before accessing the internet. Force tunneling is achieved by manipulating routing entries to ensure that VPN routes have a lower metric than those for other interfaces, effectively directing all traffic through the VPN by default. https://learn.microsoft.com/en-us/windows/security/operating-system-security/network-security/vpn/vpn-routing For troubleshooting, it's critical to ensure the VPN server has the necessary routes to internal resources and that clients are configured with routes to these internal networks. This setup ensures traffic can flow from the VPN clients to internal resources as intended. If access issues persist, verifying the correct configuration of both server and client routing, checking for any network policy server (NPS) policy misconfigurations, and ensuring proper certificate deployment are good steps. https://directaccess.richardhicks.com/2019/08/19/always-on-vpn-and-rras-with-single-nic/ https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/troubleshoot-remote-access-vpn-and-aovpn-guidance Lastly, understanding the core components of your Always On VPN infrastructure and ensuring correct configurations on both server and client sides are crucial for a functional setup. For detailed troubleshooting steps and configurations, consulting the provided Microsoft documentation and resources can offer more in-depth guidance. https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/troubleshoot-remote-access-vpn-and-aovpn-guidance
