Course 18 - Evading IDS Firewalls and Honeypots | Episode 3: Network Emulation and Security Defense: Deploying Cisco ASA and Kali Linux

In this lesson, you’ll learn about:GNS3 Platform Foundation and Image Integration:Installing GNS3 Windows All-in-One and preparing the environment for professional network emulation.Importing manufacturer-specific device images (e.g., Cisco 3745 router, ASA firewall) to run actual device code instead of generic simulators.Building a Routed Network:Configuring IP addresses and routing paths on Cisco routers.Calculating idle time to optimize host CPU usage during emulation.Establishing a functional network backbone before adding security layers.Deploying the Cisco ASA Firewall:Creating a secure network enclave with multiple security zones.Assigning security levels (Inside = 100, DMZ = 50) and managing traffic flow.Configuring explicit rules and ICMP permissions to control responses from lower- to higher-security zones.Security Testing with Kali Linux:Integrating a Kali Linux VM into the GNS3 topology for vulnerability probing.Using professional tools like Nmap and Armitage to verify firewall effectiveness.Running simulated attacks to confirm that the ASA firewall filters ports and protects internal resources.Analogy for Understanding GNS3 Emulation:Using GNS3 is like a pilot training on a full-motion flight simulator: you interact with the actual software and controls, safely practicing defensive maneuvers against cyber threats without risking a real network.You can listen and download our episodes for free on more than 10 different platforms:https://linktr.ee/cybercode_academy