On 03/19/2012 05:57 PM, Mark Wickens wrote: Sorry for being ignorant, what's GRE? It's not ignorance if you've had no reason to know about it. :-) Generic Routing Encapsulation, a Cisco protocol that implements generalized tunneling. You can tunnel just about anything over GRE. Most OSs implement GRE natively nowadays as well. -Dave -- Dave McGuire, AK4HZ New Kensington, PA