IPTables FIREWALL: How Packets REALLY Flow (Visual!)
Ever wonder why your Linux firewall rules don't work even when they look perfect?
The "Secret" isn't in the commands you type—it's in the Netfilter Hierarchy. In this video, we demystify exactly why your Linux firewall rules fail by looking at the hidden architecture of IPTables. Whether you are a SysAdmin, DevOps Engineer, or a student preparing for CCNA/Security+, understanding this "Secret" packet flow is the key to mastering Linux security.
What we cover in this 10-minute masterclass:
✅ The "Secret" 5 Tables (Filter, NAT, Mangle, Raw, Security)
✅ Why the order of your Chains (INPUT vs FORWARD) matters
✅ Understanding the Netfilter Engine vs the IPTables CLI
✅ The Packet Flow Path: How to visualize traffic inside the kernel
🔥 Ready to build it? Watch the Hands-on Lab (Part 2): [Link to Video 2]
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