What is VPN Protocol?
The set of rules and encryption methods that determine how a VPN tunnel is established and how data is transmitted through it.
Different VPN protocols offer different trade-offs between speed, security, and compatibility.
Common Protocols
- WireGuard: Modern, fast, minimal code (~4,000 lines). Uses ChaCha20 encryption. Recommended.
- OpenVPN: Mature, widely supported, open source. Can use TCP or UDP. Slower than WireGuard.
- IKEv2/IPsec: Fast, good for mobile (handles network switching well). Built into most OS.
- L2TP/IPsec: Older, slower. Generally not recommended.
- PPTP: Obsolete and broken. Never use.
What to Look For
- WireGuard is the best choice for most users
- If WireGuard isn't available, OpenVPN on UDP is the next best
- Avoid any VPN that only offers PPTP or L2TP
Privacy Note
The protocol determines the encryption, but the VPN provider determines the privacy. A trustworthy provider with an older protocol is better than an untrustworthy provider with WireGuard.
Related Terms
Encryption
The process of converting information into a code to prevent unauthorized access. Encryption transforms readable data (plaintext) into an unreadable format (ciphertext) using a cryptographic algorithm and key. Only those with the correct key can decrypt and read the original data.
TLS
Transport Layer Security is a cryptographic protocol designed to provide secure communication over a computer network. TLS encrypts the connection between your browser and web servers, ensuring privacy and data integrity. It's the technology behind HTTPS.
Virtual Private Network
A technology that creates a secure, encrypted connection over a less secure network, such as the public internet. VPNs mask your IP address, encrypt your internet traffic, and can make it appear as though you're browsing from a different location.
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