VPN Protocols Explained
Not all VPN protocols are equal. Learn the differences between WireGuard, OpenVPN, IKEv2, and CasperCloak to choose the right one.
What Is a VPN Protocol
A VPN protocol determines how your data is encrypted and transmitted between your device and the VPN server. Different protocols offer different balances of speed, security, and compatibility.
WireGuard
The newest mainstream protocol. Extremely fast with minimal code (4,000 lines vs OpenVPN 70,000+). Uses modern cryptography (ChaCha20, Curve25519). Best for speed-sensitive use cases like streaming and gaming. CasperVPN uses WireGuard as the default protocol.
OpenVPN
The industry standard for over 20 years. Open source, heavily audited, and highly configurable. Runs on TCP (port 443, hard to block) or UDP (faster). Slightly slower than WireGuard but extremely reliable and battle-tested.
IKEv2/IPSec
Excellent for mobile devices. Reconnects instantly when switching between Wi-Fi and cellular networks. Built into iOS, making it efficient on iPhones and iPads. Good security with AES-256 encryption.
CasperCloak
CasperVPN's own protocol. It makes VPN traffic look like ordinary HTTPS traffic, for networks that interfere with standard VPN protocols.
Frequently Asked Questions
Which protocol should I use?
WireGuard for everyday use and speed. CasperCloak on networks that interfere with standard VPN protocols. IKEv2 on mobile for seamless network switching.