#!/bin/sh
iptables -F

# DEFAULT POLICY
iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT DROP

# LOOPBACK
iptables -A INPUT -i lo -j ACCEPT
iptables -A OUTPUT -o lo -j ACCEPT

# DEFAULT
iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

# DNS (uitgaand)
iptables -A OUTPUT -p udp --dport 53 -j ACCEPT
iptables -A INPUT -p udp --sport 53 -j ACCEPT

# PING
iptables -A INPUT -p icmp --icmp-type echo-request -j ACCEPT
iptables -A OUTPUT -p icmp --icmp-type echo-reply -j ACCEPT

# PING (uitgaand)
# iptables -A OUTPUT -p icmp --icmp-type echo-request -j ACCEPT
# iptables -A INPUT -p icmp --icmp-type echo-reply -j ACCEPT

# SSH
iptables -A INPUT -p tcp --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp --sport 22 -m state --state ESTABLISHED -j ACCEPT

# HTTP
iptables -A INPUT -p tcp --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp --sport 80 -m state --state ESTABLISHED -j ACCEPT

# HTTP (uitgaand)
iptables -A OUTPUT -p tcp --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A INPUT -p tcp --sport 80 -m state --state ESTABLISHED -j ACCEPT

# HTTPS
iptables -A INPUT -p tcp --dport 443 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp --sport 443 -m state --state ESTABLISHED -j ACCEPT

# HTTPS (uitgaand)
iptables -A OUTPUT -p tcp --dport 443 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A INPUT -p tcp --sport 443 -m state --state ESTABLISHED -j ACCEPT

# FTP
iptables -A INPUT -p tcp --dport 21 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp --sport 21 -m state --state ESTABLISHED -j ACCEPT

# FTP (Active)
iptables -A INPUT -p tcp --sport 20 -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A OUTPUT -p tcp --dport 20 -m state --state ESTABLISHED -j ACCEPT
 
# FTP (Passive)
iptables -A INPUT -p tcp --sport 1024: --dport 1024: -m state --state ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp --sport 1024: --dport 1024: -m state --state ESTABLISHED,RELATED -j ACCEPT

# SMTP
iptables -A INPUT -p tcp --dport 25 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp --sport 25 -m state --state ESTABLISHED -j ACCEPT

# IMAP en IMAP2
iptables -A INPUT -p tcp --dport 143 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp --sport 143 -m state --state ESTABLISHED -j ACCEPT

# IMAPS
iptables -A INPUT -p tcp --dport 993 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp --sport 993 -m state --state ESTABLISHED -j ACCEPT

# POP3
iptables -A INPUT -p tcp --dport 110 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp --sport 110 -m state --state ESTABLISHED -j ACCEPT

# POP3S
iptables -A INPUT -p tcp --dport 995 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp --sport 995 -m state --state ESTABLISHED -j ACCEPT

# SUBVERSION
iptables -A INPUT -p tcp --dport 3690 -j ACCEPT

# Remote MySQL connectie
iptables -A INPUT -p tcp --dport 3306 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp --sport 3306 -m state --state ESTABLISHED -j ACCEPT

# MySQL (uitgaand)
iptables -A OUTPUT -p tcp --sport 1024: -d 0/0 --dport 3306 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A INPUT -p tcp -s 0/0 --sport 3306 --dport 1024: -m state --state ESTABLISHED -j ACCEPT

# XDebug
iptables -A INPUT -p tcp --dport 9000 -j ACCEPT
iptables -A OUTPUT -p tcp --sport 9000 -j ACCEPT

service iptables save

iptables -L -v