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<strong><h1>NAT VLC:</h1></strong>
<p><strong><h2>Explanation:</h2></strong><br>
  Set up a computer so that it forwards all packets meant for a certain address, to another computer.</p>
<p><strong><h2>Instructions:</h2></strong>
  <h3>1. Create two VMs. SimpleArbiter using the disk simpleArbiter and NATServer. </h3> 
  You can get the disks at polz.si/media/uploads/kpov/virtualke. As for the NATServer VM, you can use any disk you want like base-student-desktop-2014.
<br>
   <h3>2. NATServer should have two network interfaces, one should connect to the simpleArbiter VM and the other to the internet.</h3> 
  Adapter 1 should be NAt and adapter 2 should be Internal Network.<br>
  Simple Arbiter must be connected to the Internal Network.
<br>
	<img style="width: 500px; height: 310px;" src="../images/1.jpg" alt="slika-1"></img>
   <h3>3.On NATServer use ifconfig or /etc/network/interfaces to configure the network interfaces you created in virtualbox.<br></h3> 
	
	-vim /etc/network/interfaces<br>
	-Set it up like this:<br>
		auto eth1<br>
		iface eth1 inet static<br>
		NETMASK 255.255.0.0        # Specify based on your requirement<br>
		IPADDR 192.168.2.1        # Gateway of the LAN<br>
		NETWORK 192.168.0.0        # Optional<br>
		ADDRESS 192.168.0.0 <br>
	-ifdown eth1<br>
	-ifup eth1
<br>
<img style="width: 500px; height: 310px;" src="../images/2.jpg" alt="slika-2"></img>
   <h3>4. Configure SimpleArbiter so that it uses NATServer as the default gateway.</h3> 

  <h3> 5. Set up DNS (etc/resolv.conf) on NATServer.</h3> 
		vim /etc/resolv.conf
		nameserver 203.145.184.13      # Primary DNS Server provided by the ISP<br>
		nameserver 202.56.250.5        # Secondary DNS Server provided by the ISP<br>
	Than we set up the host:<br>
		vim /etc/hosts<br>
		Replace the first line with:<br>
			 127.0.0.1       nat localhost.localdomain   localhost<br>
			 
   <h3>6. Enable IP forwarding on NATServerju (should be run as root).</h3> 
		echo 1 > /proc/sys/net/ipv4/ip_forward
		
   <h3>7. Set up NAT on NATServer using iptables.</h3> 
		
		apt-get install iptables<br>
		iptables -F<br>
		ptables -t nat -F<br>
		iptables -t mangle -F	<br>
		iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE<br>
		iptables -A FORWARD -i eth1 -j ACCEPT<br><br>
		
		service iptables restart

   <h3>8. Use vlc on simpleArbiter to watch the video over your network. </h3> <br>


   <h3>8. Additional resources </h3> <br>
-https://www.howtoforge.com/nat_iptables<br>
-http://www.bctes.com/nat-linux-iptables.html<br>





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