Mastering IPTables, Final InstallmentLinux Journal Presents: This final installment of the IPTables tutorial details the paths that packets take along the chains, and presents some useful code snippets that should go in almost any firewall script.
Transcript: http://dark-code.bulix.org/fl04jo-68849?raw
Final firewall script: http://dark-code.bulix.org/a8il4b-68850