number_of_rules_in_each_iptables_chain

#! /bin/bash

count_chains_rules () {
awk '$1 == "Chain" { chain_name = $2 }
     chain_name != $2 && $0 != "" { chains[chain_name]++ }
     END { ORS="";
           for (var in chains) {
             print var, chains[var]-1", ";
             total += chains[var]-1
           }
           print total
         }'
}

/sbin/iptables -n -t filter -L | count_chains_rules