G'Day, What is the path data takes to complete its journey through IPTables? Many of the documents I have read provide in detail the rule construction of a firewall. I have a working firewall. Rule construction is not my goal. I am trying to understand IPTables in microcosm. My question is to help develop a better understanding of data movement within IPTables. I have constructed through research a diagram that shows the chain path through IPTables superimposed over a physical network. I am at a crossroad because my research conflicts with what I see through protocol analysis. I am missing some key piece of knowledge. I am looking for someone who has knowledge of IPTables and is willing to wear a tank to go "deep". I would like to start by reviewing the drawing and providing some suggestions. I am willing to share my research. Sean D. Conway