How to Use VPN Access for the CTF

Welcome to our CTF platform! To access the vulnerable machines, you must first complete the first Windows Active Directory challenge named:

🎯 The Lost USB Stick

After completing it, you will receive your personal .ovpn profile (OpenVPN configuration file) that lets you connect to the CTF network.

⚠ Important: You must be connected to the VPN to interact with the vulnerable machines.

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🛡 What You Need

✅ Your downloaded .ovpn profile (obtained from the challenge "Lost USB Stick")
✅ OpenVPN installed on your machine (Kali Linux or Windows)
✅ Internet connection

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🔧 How to Use OpenVPN on Kali Linux

1️⃣ Install OpenVPN
Most Kali setups already have it. If not, install it:

sudo apt update
sudo apt install openvpn

2️⃣ Move your .ovpn file Put the file (for example, ctf-profile.ovpn) somewhere convenient, e.g., your home directory.

3️⃣ Connect to the VPN

sudo openvpn --config ctf-profile.ovpn

You will see logs in the terminal. Wait for the Initialization Sequence Completed message — now you’re connected!

4️⃣ Keep this terminal open The VPN connection stays active only while this terminal is running.

🖥 How to Use OpenVPN on Windows

1️⃣ Download and install Get the OpenVPN Community Client: https://openvpn.net/community-downloads/

2️⃣ Place the .ovpn file Copy your ctf-profile.ovpn into: C:\Program Files\OpenVPN\config\

3️⃣ Run OpenVPN GUI

Launch OpenVPN GUI (as Administrator).

Right-click the OpenVPN icon in the system tray, select your profile, and click Connect.

4️⃣ Confirm connection Wait until the connection is established (you’ll see a notification).