firewall version 0.4.0 unstable

#!/bin/bash

# The Unlicense
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SPECIAL_ADDRS='255.255.255.255 240.0.0.0/4 224.0.0.0/4 203.0.113.0/24 198.51.100.0/24 198.18.0.0/15 192.168.0.0/16 192.88.99.0/24 192.0.2.0/24 192.0.0.0/24 172.16.0.0/12 169.254.0.0/16 127.0.0.0/8 100.64.0.0/10 10.0.0.0/8 0.0.0.0/8'

# !
iptables -P INPUT DROP; iptables -P FORWARD DROP; iptables -P OUTPUT DROP
ip6tables -P INPUT DROP; ip6tables -P FORWARD DROP; ip6tables -P OUTPUT DROP

chattr -i /etc/hosts.allow; > /etc/hosts.allow; chattr +i /etc/hosts.allow
chattr -i /etc/hosts.deny; echo ALL:ALL > /etc/hosts.deny; chattr +i /etc/hosts.deny

iptables -F

iptables -A INPUT -m state --state INVALID -j DROP
iptables -A INPUT -m state --state ESTABLISHED -j ACCEPT
iptables -A INPUT -i lo -j ACCEPT
iptables -A INPUT -j DROP

iptables -A FORWARD -j DROP

iptables -A OUTPUT -m state --state INVALID -j DROP
iptables -A OUTPUT -m state --state ESTABLISHED -j ACCEPT

iptables -A OUTPUT -p udp -d 127.0.0.1 --dport 9053 -j ACCEPT
iptables -A OUTPUT -p tcp --syn -d 127.0.0.1 --dport 9040 -j ACCEPT

iptables -A OUTPUT -p tcp --syn -m owner --uid-owner $1 -m state --state NEW -j ACCEPT
iptables -A OUTPUT -o lo -j ACCEPT

for special_addr in $SPECIAL_ADDRS; do
    iptables -A OUTPUT -d $special_addr -j DROP
done

iptables -A OUTPUT -j DROP

iptables -t nat -F

iptables -t nat -A OUTPUT -p udp --dport 53 -j DNAT --to-destination='127.0.0.1:9053'
iptables -t nat -A OUTPUT -p tcp --syn -d 10.192.0.0/10 -j DNAT --to-destination='127.0.0.1:9040'

iptables -t nat -A OUTPUT -p tcp --syn -m owner --uid-owner $1 -j RETURN
iptables -t nat -A OUTPUT -o lo -j RETURN

for special_addr in $SPECIAL_ADDRS; do
    iptables -t nat -A OUTPUT -d $special_addr -j RETURN
done

iptables -t nat -A OUTPUT -p tcp --syn -j DNAT --to-destination='127.0.0.1:9040'

# !
echo; echo; iptables -nvL
echo; echo; iptables -t nat -nvL
ip6tables -A INPUT -j DROP; ip6tables -A FORWARD -j DROP; ip6tables -A OUTPUT -j DROP

{
        echo DNSPort 127.0.0.1:9053
        echo AutomapHostsOnResolve 1
        echo AutomapHostsSuffixes .onion
        echo
        echo TransPort 127.0.0.1:9040
        echo VirtualAddrNetwork 10.192.0.0/10
} > /etc/tor/torrc

systemctl restart tor

echo
echo What Is My IP Address
echo https://browserleaks.com/ip
echo https://browserleaks.com/webrtc

echo
echo apt install tor sudo neovim
echo nvim ./firewall.sh
echo :set ff=unix
echo :wq!

echo
echo chmod 0755 ./firewall.sh
echo sudo ./firewall.sh [debian-]tor

echo
echo firefox
echo about:config
echo media.navigator.enabled false
echo media.peerconnection.enabled false

# !
echo
echo stop enter
read; read; read
read; read; read
iptables -F OUTPUT
iptables -t nat -F
iptables -P INPUT DROP; iptables -P FORWARD DROP; iptables -P OUTPUT ACCEPT
ip6tables -P INPUT DROP; ip6tables -P FORWARD DROP; ip6tables -P OUTPUT DROP