As a newbie forgive my ignorance. Your solution of 3 projects works fine on my desktop, uncompiled, just in debug. It also works fine on my laptop in debug. As I understand it I will use the entire solution on both computers. My question is how I would specify IP addresses. On my desktop that I would use as the server my first adapter is tied up on an intranet, and that is the adapter that the your test detects. I have a crossover between my laptop and a second adapter on my desktop that pings correct. How do I default your solution to the second adapter? thank you very much for your help.