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Video: Mastering IPTables, Final Installment

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“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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