<html> <head> <meta http-equiv=Content-Type content="text/html; charset=utf-8"> </head> <body><font face="Georgia, Times New Roman, Times, serif"> <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> </body> </html>