skrypt3.sh

#!/bin/bash

# Install guake and nano
sudo apt-get install -y guake nano
sudo apt-get install -y iptables-persistent

# Download the wallpaper

sudo wget http://i.imgur.com/qIb3xjS.png -O /home/turniej/.wallpaper.jpg
sudo chmod 777 /home/turniej/.wallpaper.jpg

# Configure the firewall

# Allow loopback
sudo iptables -I INPUT 1 -i lo -j ACCEPT

# Allow DNS
sudo iptables -A OUTPUT -p udp --dport 53 -j ACCEPT

# Now, allow connection to the judge
sudo iptables -A OUTPUT -p tcp -d 82.139.137.168 -j ACCEPT
sudo iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT

# Drop everything
sudo iptables -P INPUT DROP
sudo iptables -P OUTPUT DROP

sudo dpkg-reconfigure iptables-persistent