The Linux kernel’s network packet processing subsystem is called Netfilter, and iptables is the command used to configure it. In this video I’ll demonstrate iptables and show you practical examples on how to do port forwarding, IP forwarding, and even load balancing hopefully in upcoming videos. This is part 1.

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0:00 iptables components
4:24 Port Redirect in the same machine
10:54 Example
13:37 IP Forwarding to another machine (DNAT, SNAT)
22:00 Example
32:00 IP Forward Enable

commands used in this video
https://github.com/hnasr/javascript_playground/tree/master/iptables


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