On Fedora how can I share my VPN via a second ethernet interface?

[cgulledmund 0]

I have two ethernet interfaces. On Fedora Linux. I have set eddie to use en0.
When eddie is not running ie vpn is down, my en1 interface operates in shared mode.
en0 connects to the internet
A second PC is connected to interface en1 via a hub and the second PC can then see the internet
When the VPN is running, my local Fedora can see the internet, but the second PC can no longer connect to en1 .
How can I fix this so I can share my connection to the upstream laptop.
Thank you

[OpenSourcerer 1488]

Is NetLock on? This might be the culprit.