Using VPN for Remote Work Without SSO Issues

Before You Start Remote work has become increasingly common, and Virtual Private Networks (VPNs) are essential tools for maintaining security. However, using a VPN can sometimes interfere with Single Sign-On (SSO) systems and access to local network printers. This guide will walk you through configuring a VPN for remote work while preserving these functionalities. Prerequisites: - Basic understanding of network concepts - Access to VPN client software - Admin rights to configure VPN settings Security Warning: Always ensure your VPN configuration aligns with your organization's security policies to prevent unauthorized access. Technical Background A VPN creates a secure tunnel for data between your device and a VPN server, encrypting the traffic to protect against eavesdropping. However, this tunnel can also route all your network traffic through the VPN, which may disrupt local network services like SSO and printers. SSO systems rely on authentication tokens and cookies stored in your browser or application. If these requests are routed through a VPN server, they might appear to originate from a different location, causing authentication failures. Local printers, which typically use local network IP addresses, may become inaccessible because the VPN redirects traffic away from the local network. Split tunneling can address this by routing only specific traffic through the VPN while keeping local traffic intact. Step By Step 1. Identify the services you need to use through the VPN and those requiring local network access (e.g., SSO, printers). 2. Configure the VPN client to use split tunneling: - Windows: Use PowerShell Command: Add-VpnConnectionRoute -Name "AstraguardVPN" -DestinationPrefix "192.168.1.0/24" -PassThru - Linux: Edit the OpenVPN configuration file Example: route 192.168.1.0 255.255.255.0 net_gateway 3. Test SSO functionality by accessing your organization's portal and verifying login success without additional prompts. 4. Check printer access by printing a test page to a local printer on your network. Worked Example Let's configure a VPN connection with split tunneling for a network where local resources are on subnet 192.168.1.0/24, and the VPN server is at 10.8.0.2. Example: - For Windows PowerShell: Add-VpnConnectionRoute -Name "AstraguardVPN" -DestinationPrefix "192.168.1.0/24" -PassThru - For Linux (OpenVPN): route 192.168.1.0 255.255.255.0 net_gateway Configuration Or Command Reference - remote 10.8.0.2 1194 udp — VPN server endpoint an…