#!/usr/bin/env bash
#append this script to rc.local file

#enable iptables rules
iptables -F
iptables -X
iptables -Z
iptables -P INPUT DROP
iptables -P OUTPUT ACCEPT
iptables -P FORWARD DROP 

iptables -A INPUT -i lo -j ACCEPT
iptables -A INPUT -i eth0 -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A INPUT -i tun0 -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A OUTPUT -o lo -j ACCEPT

#unmute alsa audio
amixer set 'Master' 80% unmute
amixer set 'Headphone' 80% unmute

#modify default dns server
chattr -i /etc/resolv.conf
chmod 777 /etc/resolv.conf
echo "nameserver 127.0.0.1" > /etc/resolv.conf
chmod 444 /etc/resolv.conf
chattr +i /etc/resolv.conf

#set static ip address
ip link set eth0 up
ip addr add 192.168.50.253/24 broadcast 192.168.50.255 dev eth0
ip route add default via 192.168.50.1