[Day 5] 3. OpenVPN Setup

For this lab: we require two machines: Windows and Debian Keep the both machines in NAT

Steps to Configure VPN:

On Debian (Linux) Machine:

Install OpenVPN: Open a terminal and install OpenVPN:

bash
sudo apt-get install openvpn

Create the
```
server.conf
```
Configuration File:
- Create a file named
```
server.conf
```
  in your home directory (e.g.,
```
/home/user/
```
  ).
- Add the following content to the file:
```
plaintext
proto udp
port 1194
dev tun
auth none
cipher none
ifconfig 10.8.0.1 10.8.0.2
verb 3
```
- Explanation of settings:
  - ```
  proto udp
```
  : Sets the protocol to UDP.
- ```
port 1194
```
    : OpenVPN default port.
  - ```
  dev tun
```
  : TUN device (used for routing packets).
- ```
auth none
```
    : No authentication.
  - ```
  cipher none
```
  : No encryption.
- ```
ifconfig 10.8.0.1 10.8.0.2
```
    : Assigns IP addresses.
  - ```
  verb 3
```
  : Sets the verbosity level to 3 (detailed logging).

Start the OpenVPN Server: Start OpenVPN using the

server.conf

file:

bash
sudo openvpn --config server.conf

On Windows Machine (VM):

Install OpenVPN:
- Install OpenVPN on your Windows VM.
Ensure Three Network Adapters:
- Make sure you have two adapters (one Ethernet and one Bluetooth). Bluetooth might not be there.
- When OpenVPN is installed, a new virtual network adapter should automatically be created.
- Press
```
Windows + R
```
  and type
```
ncpa.cpl
```
  . You can check your adapters here.

Create the

client.conf

Configuration File:

On the Windows machine, create a file (e.g.,
```
client.conf
```
).

Add the following content:

plaintext
remote <vpn_ip>  # Replace <vpn_ip> with the actual IP of your VPN server (Debian machine).
proto udp
port 1194
dev tun
auth none
cipher none
ifconfig 10.8.0.2 10.8.0.1
verb 3

Save the file as
```
client.conf
```
in a location like
```
C:\Myfiles\client.conf
```
.

Start OpenVPN Client:

Go to the OpenVPN directory on the Windows machine:


C:\Program Files (x86)\OpenVPN Technologies\OpenVPN Client\core

Run the following command in the terminal:

bash
openvpn --config c:\Myfiles\client.conf

Make sure to provide the correct path where you saved
```
client.conf
```
.

Testing the VPN Connection:

Ping the VPN IPs:
- Now, try pinging both IPs:
  - The actual IP (e.g.,
```
192.168.80.128
```
    ).
  - The VPN IP (
```
10.8.0.1
```
    and
```
10.8.0.2
```
    ).
You should be able to successfully ping both IPs, indicating that the VPN is set up and working properly.

Important Note:

Do not close the terminals (both the server and client sessions) while testing the connection.

[Day 5] 3. OpenVPN Setup

Steps to Configure VPN:

On Debian (Linux) Machine:

On Windows Machine (VM):

Testing the VPN Connection:

Important Note:

Read Next

[Day 5] 4. Working of VPN

[Day 5] 5. Sharing Internet Access Between VMs Using Clear OS