How to Set Up a Secure VPN on Windows Server 2019

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Virtual Private Networks (VPNs) are essential for securing network traffic, especially when transmitting sensitive data over potentially insecure networks like the internet. This tutorial will guide you through the process of setting up a VPN using Windows Server 2019, focusing on the use of Routing and Remote Access Service (RRAS) to enable VPN functionalities.

Prerequisites: Before starting, ensure you have administrative rights to the Windows Server 2019 system. Additionally, you'll need to have the server connected to your network and have an internet connection available. A static IP address for the server is recommended to avoid disruptions in the VPN service.

Step 1: Install the RRAS Role

First, install the RRAS role on your server. Open the 'Server Manager', click on 'Manage', and then 'Add Roles and Features'. Follow the on-screen instructions until you reach the 'Roles' section. Here, select 'Remote Access' and then proceed to install the role. After the installation, a configuration wizard will appear; however, close this for now as we will configure RRAS manually later.

Step 2: Configure RRAS

Once the role installation is complete, open the RRAS configuration by returning to the 'Server Manager', selecting 'Tools', and then 'Routing and Remote Access'. Right-click your server name and choose 'Configure and Enable Routing and Remote Access'. Choose 'Custom Configuration', then select 'VPN access', and finish by clicking 'Next' and 'Finish'. You will be prompted to start the service; agree to this to enable VPN functionalities.

Step 3: Configure Authentication and Network Policies

Authentication is crucial for a secure VPN. For this setup, we'll use the built-in Windows authentication. Go to the 'Routing and Remote Access' management console, right-click your server, navigate to 'Properties', and then the 'Security' tab. Here, under 'Authentication provider', choose 'Windows authentication'. Next, set up network policies by navigating to 'NPS (Local)' under 'Standard Configuration' in the 'Routing and Remote Access' console, and set conditions and constraints according to your organization's security requirements.

Step 4: Configure User Accounts for VPN Access

For users to access the VPN, they need enabled accounts. In 'Server Manager', go to 'Tools' > 'Active Directory Users and Computers'. Select 'Users', right-click on the user who needs VPN access, choose 'Properties', navigate to the 'Dial-in' tab, and check the 'Allow access' option under 'Network Access Permission'. Repeat this for all users who need VPN access.

Step 5: Connect to the VPN from a Client Machine

Finally, you need to connect to the VPN from a client machine. On the client, go to 'Settings' > 'Network & Internet' > 'VPN' > 'Add a VPN connection'. Enter the connection details for your server, which include the VPN type (likely SSTP or L2TP), and the sign-in info (user name and password). Once all details are filled in, click 'Save', and then connect by selecting the VPN connection and clicking 'Connect'.

Setting up a VPN on Windows Server 2019 using RRAS is a straightforward process that enhances your network's security. By following these steps, you can establish a functional and secure VPN that ensures your data is protected during transmission.

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