Introduction: The Corporate Standard
Before the internet had secure websites, businesses needed a way to send sensitive data between their corporate offices over the public web safely. They invented IPSec (Internet Protocol Security). Instead of just encrypting the payload of a packet, IPSec can encrypt the *entire* packet, including the source and destination IPs.
How It Works: Layers of Math
IPSec isn't just one protocol; it's a suite of tools. It uses **IKEv2** (Internet Key Exchange) to establish a mathematical trust between two routers. Once trust is established, it builds a secure ESP (Encapsulating Security Payload) tunnel. It is complex, incredibly secure, and notoriously difficult to set up correctly.
Conclusion
IPSec remains the absolute standard for 'Site-to-Site' corporate networking. It is the unshakeable foundation of enterprise security. Check your protocol support here.