How to Implement Virtual Private Network (VPN) Reverse Split Tunneling on Your VPS

Reverse split tunneling in a Virtual Private Network (VPN) allows some traffic to be sent through the VPN while other traffic is directly routed to the internet. This can be useful if you want to protect specific applications or services with a VPN while allowing others to bypass it.

To implement reverse split tunneling on your Virtual Private Server (VPS), you'll need administrative access to the server and a VPN server software installed. Below are general steps you can follow, but please note that the exact process may vary depending on the specific VPN software you are using.

Here's a step-by-step guide using OpenVPN as an example:

1. Access Your VPS:
   • Connect to your VPS using SSH or any preferred remote access method.
2. Install and Set Up OpenVPN:
   • If you haven't already, install OpenVPN on your VPS. You can refer to the official OpenVPN documentation for detailed instructions on how to do this.
3. Configure OpenVPN:
   • Create the necessary server and client configurations, keys, and certificates.
   • Make sure your VPN server is working properly before proceeding.
4. Edit the OpenVPN Server Configuration:
   • Open the OpenVPN server configuration file. This is typically located in /etc/openvpn/server/server.conf.
5. Configure Split Tunneling:Example:perlCopy codepush "route 192.168.1.0 255.255.255.0"
   This example pushes traffic destined for the 192.168.1.0/24 subnet through the VPN.
   • By default, OpenVPN routes all client traffic through the VPN. To enable split tunneling, you'll need to push specific routes to clients.
6. Restart OpenVPN:
   • After making changes to the configuration file, restart the OpenVPN server for the changes to take effect.
7. Configure Client(s):Example (for OpenVPN client configuration file):pythonCopy codepull-filter ignore "redirect-gateway"
route 192.168.1.0 255.255.255.0
   The first line prevents the client from using the default gateway pushed by the server. The second line adds a specific route to the 192.168.1.0/24 subnet.
   • On the client side, you'll need to modify the OpenVPN client configuration to accept pushed routes.
8. Test:
   • Connect your client to the VPN and verify that traffic to the specified subnet goes through the VPN while other traffic bypasses it.

Please note that the specifics of the configuration may vary depending on your VPS provider, operating system, and VPN software. Always refer to the documentation provided by your VPS provider and the VPN software you are using for the most accurate and up-to-date instructions. Additionally, ensure that you have proper authorization and permissions to make changes to your VPS.