This gem provides a library that is a higher-level abstration for iptables. It can be used for parsing iptables-save output and producing iptables-restore compatible output.

This tool takes in the output of iptables-save and returns a hash in JSON. This is useful for debugging the parser. You can either run iptabes-save directly:

iptables-save | iptables-decode

Or pipe from the persisted file:

cat /etc/iptables/rules.v4 | iptables-decode