#!/bin/bash
sed -e 's/iface\ lo\ inet\ loopback/iface\ lo\ inet\ loopback\npre-up\ iptables-restore\ \<\ \/etc\/iptables.up.rules/g' -i /etc/network/interfaces && touch /etc/iptables.up.rules && echo "*filter" >> /etc/iptables.up.rules && echo >> /etc/iptables.up.rules && echo "-A INPUT -i lo -j ACCEPT" >> /etc/iptables.up.rules && echo "-A INPUT -i ! lo -d 127.0.0.0/8 -j REJECT" >> /etc/iptables.up.rules && echo >> /etc/iptables.up.rules && echo "-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT" >> /etc/iptables.up.rules && echo >> /etc/iptables.up.rules && echo "-A OUTPUT -j ACCEPT" >> /etc/iptables.up.rules && echo >> /etc/iptables.up.rules && echo "-A INPUT -p tcp --dport 80 -j ACCEPT" >> /etc/iptables.up.rules && echo "-A INPUT -p tcp --dport 443 -j ACCEPT" >> /etc/iptables.up.rules && echo >> /etc/iptables.up.rules && echo "-A INPUT -p tcp -m state --state NEW --dport 22 -j ACCEPT" >> /etc/iptables.up.rules && echo >> /etc/iptables.up.rules && echo "-A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT" >> /etc/iptables.up.rules && echo >> /etc/iptables.up.rules && echo "-A INPUT -m limit --limit 5/min -j LOG --log-prefix \"iptables denied: \" --log-level 7" >> /etc/iptables.up.rules && echo >> /etc/iptables.up.rules && echo "-A INPUT -j REJECT" >> /etc/iptables.up.rules && echo "-A FORWARD -j REJECT" >> /etc/iptables.up.rules && echo >> /etc/iptables.up.rules && echo "COMMIT" >> /etc/iptables.up.rules && iptables-restore < /etc/iptables.up.rules