Cybersecurity — VPN
What is VPN?
Encrypted tunnel for secure remote access.
OpenVPN setup
# Install
sudo apt install openvpn
# Server config
port 1194
proto udp
dev tun
ca ca.crt
cert server.crt
key server.key
dh dh2048.pem
# Start server
sudo openvpn --config server.conf
WireGuard
# Install
sudo apt install wireguard
# Generate keys
wg genkey | tee privatekey | wg pubkey > publickey
# Configure
[Interface]
PrivateKey = <private_key>
Address = 10.0.0.1/24
[Peer]
PublicKey = <public_key>
AllowedIPs = 10.0.0.2/32
VPN types
| Type | Protocol | Speed |
|---|---|---|
| IPsec | UDP 500/4500 | Fast |
| OpenVPN | UDP 1194 | Moderate |
| WireGuard | UDP 51820 | Fast |
Best practices
- Use strong encryption
- Enable kill switch
- Split tunneling for performance
- Regular key rotation
Mini Practice
- Set up WireGuard
- Configure OpenVPN
- Test VPN connection
- Verify encryption
Up Next
Continue with SSL/TLS - Transport security.
Related Topics
Frequently Asked Questions about VPN
What is VPN in Cybersecurity?
VPN is a fundamental concept in Cybersecurity. This lesson explains it step by step with clear examples, making it easy for beginners to understand.
How do I learn VPN?
Start by reading the explanation above, then try the code examples. Practice by modifying the examples and experimenting with different values. Hands-on practice is the best way to learn VPN.
Why is VPN important in Cybersecurity?
VPN is essential for Cybersecurity development. Understanding this concept will help you write better code and solve real-world problems more effectively.