Video: Mastering IPTables, Final Installment

"Probably the most confusing part about IPTables is the organization of the chains and tables. I am going to show diagrams of exactly how different packets will traverse the chains and in what order.

"There are three basic routes for a packet to take. Let's consider PATH 1 a packet originating from outside the network and destined for the local machine. It's route is as followings:"

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