This course provides a deep dive into the world of IPSec VPNs, covering everything from basic concepts to advanced troubleshooting techniques. Participants will gain a thorough understanding of IPSec, Virtual Private Networks (VPN), and their various types. The course delves into the inner workings of IPSec, exploring its protocols, modes, and frameworks.

Topics Covered:

Understanding VPNs:

Definition of VPN

Types of VPNs

Introduction to IPSec:

What is IPSec?

How IPSec Works

Benefits of IPSec

IPSec Modes:

Tunnel Mode

Transport Mode

IPSec Framework:

Protocols involved in IPSec

IKEv1 & IKEv2:

Wireshark Capture and PCAP file analysis

Authentication Header (AH)

Encapsulating Security Payload (ESP)

Internet Key Exchange (IKE)

IPSec Best Practices:

Recommended practices for implementing IPSec

Policy-Based VPN vs. Route-Based VPN:

Understanding the differences between these two VPN types

Troubleshooting IPSec-VPN Issues:

Identification and resolution of common problems

IPSec VPN Troubleshooting Decision Diagram:

A structured approach to diagnosing IPSec VPN issues

tcpdump for IPSec VPN Troubleshooting:

Practical guidance on using tcpdump for troubleshooting IPSec VPNs

Interview Preparation:

Most asked Interview Questions and Answers related to IPSec VPNs

By the end of this course, participants will be equipped with the knowledge and skills needed to confidently implement, manage, and troubleshoot IPSec VPNs in real-world scenarios.