Sharing 802.1x wifi connection via ethernet (to PS3 for example) - workarounds?

Question

The situation is this: my university network is 802.1x wireless, and I need to share the connection over Ethernet to a device that isn't compatible with 802.1x wireless. When I try to do this, Mavericks comes up with a message saying:
Your Internet connection cannot be shared because it is protected by 802.1X.
Now, the workaround that the IT dept has given me is this:
Open apple script editor and paste everything between the lines below into a new file:
===================================================================
try
do shell script "sudo /usr/sbin/sysctl -w net.inet.ip.forwarding=1" with administrator privileges
do shell script "sudo /usr/sbin/natd -interface en1 -dynamic" with administrator privileges
do shell script "sudo /sbin/ipfw add divert natd all from any to any via en1" with administrator privileges
end try
===================================================================
Click on the compile button to make sure there are no errors. Then click on File and Export. Change the File Format to Application. Then click save.
Run the file you have just saved by double clicking on it. You will be prompted for your Mac username and password.
It's not working however. Any thoughts? Anything that I could change?

Answer 1

Thanks for the video, definitely helpful. I followed the steps exactly, but I can only get to the "Test Internet" connection section and it fails.
The Xbox passes the Network section of the test, but the test fails after that.