Episode 65: GRE and IPsec — Tunneling and Secure Transport
As businesses expand and remote work becomes the norm, tunneling protocols like GRE and IPsec play a critical role in securely connecting distributed networks. This episode explains how Generic Routing Encapsulation (GRE) allows different network protocols to be encapsulated within IP packets, making it ideal for complex routing scenarios. GRE is simple, flexible, and often used in combination with other security layers. You'll learn how GRE is configured and what advantages it offers in site-to-site connections.
We then shift to IPsec, a more comprehensive and secure tunneling protocol that offers encryption, integrity checking, and authentication. You'll learn the difference between transport mode and tunnel mode, and how protocols like IKE and AH work behind the scenes to establish secure sessions. We also cover how IPsec is commonly used in VPNs to protect data as it moves across untrusted networks. Whether you're building a secure WAN or preparing for exam questions on encrypted tunneling, this episode delivers the clarity you need.
