OpenVPN Client to Client Connection

1. What is OpenVPN (tun)?

OpenVPN is an open-source software application that implements virtual private network (VPN) techniques for creating secure point-to-point or site-to-site connections in routed or bridged configurations and remote access facilities.

2. Prerequisites:

• OpenVPN connect installed on your device.
• You need to generate the necessary certificates and keys from open server.
• Connecting board to device:

Connect your router to your device via

• Ethernet cable:

Directly connect router port with RS45 wire to your device.

• Wireless network connection:

Connect router to your device using Wi-Fi, check device name and password on the device’s label.

• For Example: SSID: APClient_37B11241001
•                       PWD: 12345678

3. Login to device:

• To enter the router’s Web interface (web IU), type 192.168.10.1 into the URL field of your internet browser.
• Use the following login information when prompted for authentication.

Username: admin

Password: admin

4. Configuration:

Now we can configure OpenVPN Server and Client instances.  For this example, we will be creating a TUN (Tunnel) type connection that uses the UDP protocol for data transfer and TLS for Authentication.

Here the router is server and PC is client.

Server (Router) Configuration:

1.) Click on settings => VPN

2.) In general settings, enable VPN

3.) Save the changes made

4.) Click on OpenVPN

5.) In Add New Configurations, give a name (Test in this case)

6.) Click Add

7.) Click on upload

8.) After pop-up occurs, upload the server certificate created (Server; LAN IP: 192.168.10.1; WAN (Public static) IP: 45.118.163.8) in this case.

9.) Click Apply

10.) Update the page

*Disconnect router from PC for testing purpose*

5. Testing OpenVPN Client to Client Connection:

• Ping server(router) from PC, use the virtual IP assigned to your server

(10.8.1.19 in this case).

• Ping PC from Server(router), use the virtual IP assigned to PC

(10.8.1.20 in this case).

• Ping LAN_IP (192.168.10.1 in this case) from Server(router).

• To sum up, just make sure the Server and the Clients use the same parameters (same authentication, same port, same protocol, etc.).

• From the Client side, make sure to enter the correct Remote host/IP address (45.118.163.8 in this case). This is the Server's Public IP address.