iptables configuration file location

Where are the default rules/config of iptables located android. I do not mean source code of iptables (which is external/iptables) but I need the actual configuration file(s) that defines the rules.

In my phone it looks like this

root@GT-N7000:/ # iptables -S
-P INPUT ACCEPT
-P FORWARD ACCEPT
-P OUTPUT ACCEPT 

and so on. Many thanks