Firewalls: What are they, and why do you need one in your home? I'll discuss what function a firewall provides, some of the advanced security features available, and how they can secure your infrastructure and services. I also cover vendor options, hardware recommendations for building a firewall, and provide a guided tour of my homelab firewall segementation and defence in depth approach. Managed Switch: https://amzn.to/3OIPQU3 Discord: https://discord.gg/qW5vEBekz5 00:00 - Introduction 02:48 - IDS and IPS 05:12 - Realtime monitoring 06:00 - Security Incident & Event Monitoring (Wazuh Dashboard) 06:50 - OSI model 07:56 - Man in the middle attack 09:34 - Sophos XG features 09:59 - Firewall choices 11:16 - Physical vs Virtual deployment 12:06 - Why I chose a virtual firewall 12:19 - Which Nics to buy when building a firewall? 13:40 - My setup 15:29 - Network diagram of my setup 16:50 - Walkthrough 19:06 - Crowdsec 20:45 - Accessing external services internally 21:24 - Pihole