Amazon VPC IPSec Protocol Theory and Background

In this lesson, you will be introduced to Amazon VPC IPsec VPNs. We will first introduce you to the IPsec security protocol, highlighting key components - providing explanations of what it is and why and where it is useful.

We will describe in detail the individual parts of IPsec protocol suite, such as Authentication Headers and Encapsulating Security Payloads. We will touch on Security Associations and Key negotiation phases such as IKE phase 1 and phase2. We will finish our IPsec theory with an explanation of the differences between the different network transportation modes, Transport mode, and Tunnel mode.

We examine where and how AWS uses and implements IPsec, introducing you to the VPC components Virtual Private Gateway, Customer Gateway, and VPN Connection.

Finally - We will conclude our lesson with two VPC IPsec demonstrations.

In the 1st demonstration, we will create a Statically routed IPsec VPN between 2 VPCs.

In the 2nd demonstration, we will create a Dynamically Routed IPsec VPN between 2 VPCs. This demonstration will include BGP used to perform route advertisements - demonstrating route propagation.