Basic and simple iptables configurations for home users

OpenBSD has been always my prefered distribution when I have to install a firewall based on a *NIX machine. The PF rules are what I am used to see. But last year I had to write several configurations for a debian machine using iptables which I am not really used to. Since I tend to forget these things, I paste here a basic configuration, if you want to use it, paste this in your desired starting script.

Configuration #1: Basic firewall accepting web, ssh and ftp

#delete tables
iptables -F
iptables -X

#default policies
iptables -P INPUT DROP
iptables -P OUTPUT ACCEPT
iptables -P FORWARD DROP

#Accept loopback
iptables -A INPUT -i lo -j ACCEPT
iptables -A OUTPUT -i lo -j ACCEPT

#Keep State for already stablished traffic
iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
#Serveis que permetem (web,ssh,ftp,icmp):
iptables -A FORWARD -p tcp --dport 80 -j ACCEPT
iptables -A FORWARD -p tcp --dport 22 -j ACCEPT
iptables -A FORWARD -p tcp --dport 21 -j ACCEPT
iptables -A FORWARD -p icmp -j ACCEPT
#Pings to firewall:
iptables -A INPUT -p icmp -j ACCEPT

Configuration 2: Only pings to firewall

#delete tables
iptables -F
iptables -X

#default policies
iptables -P INPUT DROP
iptables -P OUTPUT ACCEPT
iptables -P FORWARD DROP

#Keep State for already stablished traffic
iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT

#Pings to firewall:
iptables -A INPUT -p icmp -j ACCEPT