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== Old Instructions ==

In order for you to do port forwarding for your server, you must setup the iptable rules. We need two pieces of functionality:

 1. NAT
 1. Port forwarding 3389 -> 192.168.1.2:3389 and 3390 --> 192.168.1.3:3389

To setup NAT on Ubuntu, see [[https://help.ubuntu.com/community/Internet/ConnectionSharing#Ubuntu_Internet_Gateway_Method_.28iptables.29|Ubuntu NAT]]. We'll add a short bit of instructions to the system to forward the ports as follows:

{{{
#Port Forwarding Stuff:
iptables -t nat -A PREROUTING -i eth0 -p tcp -d 216.249.119.[your ip] --sport 1024:65535 --dport 3389 -j DNAT --to-destination 192.168.1.2
iptables -t nat -A PREROUTING -i eth1 -p tcp -d 216.249.119.[your ip] --sport 1024:65535 --dport 3389 -j DNAT --to-destination 192.168.1.2
iptables -t nat -A PREROUTING -i eth0 -p tcp -d 216.249.119.[your ip] --sport 1024:65535 --dport 3390 -j DNAT --to-destination 192.168.1.3:3389
iptables -t nat -A PREROUTING -i eth1 -p tcp -d 216.249.119.[your ip] --sport 1024:65535 --dport 3390 -j DNAT --to-destination 192.168.1.3:3389
}}}

NOTE: ALL OF THIS CAN BE FOUND BY TYPING "man iptables" from the command line in linux.

Virtual Network Configuration

NOTE: THERE HAS BEEN A CHANGE THE PROCEDURE BELOW! YOU NO LONGER NEED TO SETUP THE WHOLE SYSTEM SEE THE NEW DIRECTIONS

Below is a diagram that shows how your virtual network sees the world and how the world sees it. We have eliminated for the moment the complications of the <<latex($\mu$)>>Cloud. The IP address 216.249.119.123 is a place holder for your IP address.

Network Diagram.png

New Instructions

First it is possible for you to use the old instructions, but the following procedure will make it easier.

  1. Download the new scripts: nat, interface, list

  2. Using FileZilla or your favorite scp client and login to your server (use the Host=IP address, username=[name given in class] and port=22).

  3. Upload the "nat" file you downloaded. (A real linux person would use wget or some such utility to get it directly from this site to your linux machine if you want try that instead ;-)

  4. On your linux machine issue the command:  chmod u+x nat 

  5. Now run it ./nat -a [your ip address]

Your system is now setup! You can double check this by running  ./list  which shows the configuration changes that we just made. Of course you can always just look at the script to see what it did ;-}

Troubleshooting

So you may have noticed that there is already a nat script on your server. Well it does an extra thing that will cause trouble. If you ran that script you need to edit /etc/network/interfaces and remove the duplicate eth1 information.

WindowsAdministration/VirtualNetworkConfiguration (last edited 2021-08-26 16:49:18 by scot)