I’m unable to access external websites or specific URLs, including the one you provided. However, I can certainly help you create a markdown article explaining how to set up L2TP over IPSec and how to port forward the necessary ports. Here’s a guide on how to do it:

Creating an L2TP over IPSec VPN

In this guide, we will walk you through the process of setting up your own L2TP (Layer 2 Tunneling Protocol) VPN over IPSec (Internet Protocol Security). This will allow you to establish a secure connection to your home network or server from a remote location.

Prerequisites

Before you begin, make sure you have the following:

• A device running a compatible operating system (e.g., Windows, macOS, Android, or iOS).
• Access to your router’s configuration settings.
• Knowledge of your router’s internal IP address (usually something like 192.168.1.1).
• Administrative access to your router (username and password).

Step 1: Enable L2TP over IPSec on your VPN Server

1. Log in to your VPN server or router’s web interface using its internal IP address.
2. Navigate to the VPN or Security settings, depending on your router model.
3. Look for an option related to VPN protocols and select L2TP over IPSec.
4. Save your settings and apply the changes.

Step 2: Port Forwarding

To allow external connections to your VPN server, you need to set up port forwarding for the following ports:

• L2TP traffic: UDP 1701
• Internet Key Exchange (IKE): UDP 500
• IPSec Network Address Translation (NAT-T): UDP 4500

Here’s how to port forward these ports on most routers:

1. Log in to your router’s web interface.
2. Navigate to the Port Forwarding or NAT (Network Address Translation) section.
3. Add a new port forwarding rule for each of the ports mentioned above.
   • For each rule, specify the protocol as UDP.
   • Set the internal IP address to the local IP address of your VPN server.
   • Save and apply the changes.

Step 3: Configure VPN Client

Now that your VPN server is set up and the necessary ports are forwarded, configure your VPN client device to connect to the server:

1. Open the VPN settings on your client device.
2. Add a new VPN connection.
3. Select “L2TP over IPSec” as the VPN type.
4. Enter the public IP address of your home network (you can find this by searching “What is my IP” on Google).
5. Enter your username and password for the VPN server.
6. Save the configuration and connect to the VPN.

That’s it! You have successfully set up your own L2TP over IPSec VPN. You can now securely access your home network or server from anywhere with an internet connection.

Remember to keep your router and VPN server up to date with the latest firmware and security patches for maximum security.