#!/bin/bash
#clear iptables
iptables -F
iptables -X

#accept everything no matter port on localhost
iptables -A INPUT -i lo -j ACCEPT

#allow established connections
iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

#allow traffic going to specific outbound ports
iptables -A OUTPUT -p tcp --dport 80 -j ACCEPT
iptables -A INPUT -p tcp --sport 80 -j ACCEPT

iptables -A OUTPUT -p tcp --dport 443 -j ACCEPT
iptables -A INPUT -p tcp --sport 443 -j ACCEPT

iptables -A OUTPUT -p tcp --dport 5938 -j ACCEPT
iptables -A INPUT -p tcp --sport 5938 -j ACCEPT

iptables -A OUTPUT -p tcp --dport 53 -j ACCEPT
iptables -A INPUT -p tcp --sport 53 -j ACCEPT

iptables -A OUTPUT -p udp --dport 53 -j ACCEPT
iptables -A INPUT -p udp --sport 53 -j ACCEPT

#drop anything that doesn't match the rules above
iptables -A INPUT -j DROP
iptables -A OUTPUT -j DROP
iptables -A FORWARD -j DROP

#!/bin/bash

#--------------------------------------
#Clear iptables
iptables -F -t nat
iptables -X -t nat
iptables -F -t filter
iptables -X -t filter

#allow forward
echo '1' > /proc/sys/net/ipv4/ip_forward

#default policy
iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT DROP


#accept related and established connection
iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

# DNS
iptables -A INPUT -p tcp -m tcp --sport 53 -j ACCEPT
iptables -A INPUT -p udp -m udp --sport 53 -j ACCEPT
iptables -A OUTPUT -p tcp -m tcp --dport 53 -j ACCEPT
iptables -A OUTPUT -p udp -m udp --dport 53 -j ACCEPT

# interfejs LO
iptables -A INPUT -i lo -s 127.0.0.1 -j ACCEPT
iptables -A OUTPUT -o lo -d 127.0.0.1 -j ACCEPT

#WWW
iptables -A INPUT -p tcp --dport 80 -m state --state NEW -j ACCEPT
iptables -A OUTPUT -p tcp --dport 80 -m state --state NEW -j ACCEPT

#TEAMVIEWER
iptables -A OUTPUT -o eth0 -p tcp --dport 5938 -m state --state NEW -j ACCEPT