3 Components

In the context of iptables, there are several components.

 3.1 Rules
  3.1.1 Criteria
  3.1.2 Target
  3.1.3 Continuation (go to)
 3.2 Chains
 3.3 Tables
  3.3.1 filter
  3.3.2 nat
  3.3.3 mangle