To set up a VPN server on your OpenWrt router,follow these organized steps:

1. Access the Router Interface:

   • Open your web browser and navigate to your router's IP address.
   • Log in using the default credentials (usually 'root' for both username and password).

2. Update the Package Repository:

   • Go to the Packages section.
   • Click on the Repo tab and add the OpenWrt repository: https://packages.openwrt.org/repo.
   • Refresh the repository cache to update available packages.

3. Install VPN Server Package:

   • In the Packages tab, search for vpnserver.
   • Click "Install" and confirm the installation.
   • Reboot the router after installation to apply changes.

4. Configure the VPN Server:

   • Navigate to Services > VPN > OpenVPN.
   • Set up the server with Protocol as TCP and Port as 1194.
   • Choose a strong cipher (e.g., AES-256-CBC) and enable encryption.

5. Generate Client Certificates:

   • In the Client tab, click "Generate" to create certificates.
   • Name them (e.g., client1, client2) and assign static IPs (e.g., 168.1.100, 168.1.101).

6. Configure Client Devices:

   • Go to VPN > Devices.
   • Add each client with their respective certificate and server IP.
   • Adjust port if necessary and set the tun interface to tun.

7. Download and Configure OpenVPN Client:

   • Download OpenVPN from the official site.
   • Install it on your device.
   • Open the app, import the client certificate, and enter the server's public IP and port 1194.

8. Test the Connection:

   • Test connectivity by pinging the server's IP from the client.
   • Check router logs under VPN > Logs for any issues.

9. Secure Firewall Settings:

   • In Firewall > Rules, add rules to allow VPN traffic on port 1194 for both TCP and UDP.

10. Ensure Security:

    • Verify that certificates are securely managed and up-to-date.
    • Consider additional security measures like two-factor authentication.

By following these steps, you should have a functional and secure OpenWrt VPN setup.