A Deep Dive into Iptables: From Zero to Hero in One Blog Series

Imagine that you have a toy box with different sections for different types of toys, like dolls in one section, cars in another, and blocks in a third. Iptable chains are kind of like these different sections. When a new toy comes into your toy box, you look at it and decide which section it belongs in. Each section has its own set of rules for what toys are allowed in that section. Iptables does the same thing for network traffic that comes into or leaves your computer. When a network packet comes in, iptables looks at it and decides which chain it belongs in. There are three default chains: INPUT (for incoming traffic), OUTPUT (for outgoing traffic), and FORWARD (for traffic that is just passing through). <a href="https://vik-y.medium.com/a-deep-dive-into-iptables-from-zero-to-hero-in-one-blog-series-ab41dbbe29b2">Website</a>