Wandering ramblings

Have you ever had someone who just wandered into your house and traipsed on through until the exited via the front door? Starting with the movie "Ferris Bueller's Day Off" where Bueller is racing to get home and run's through someone's home, on through many other movies. Well, i have been dealing with something similar at my day job - and that is disconcerting to say the least. It is not from, nor is it destined, for any device within the network i work on. It is uni-directional and was getting stopped at the first security device it encounters, but it is a real pain to track down. I've been working on this kind of thing for about a week now... For now this has been taking up most of my spare "cpu cycles"... i hope to post more soon...