I love the stories about kiddies busting up the traffic controllers. That's a load of crap. A friend of mine is one of our city engineers who design, maintain, and fix the traffic control systems. He was kind enough to show me what happens when you feed invalid signals to the light boxes: they all go red. it turns into a 4-way stop. There is hardware in the lights to prevent that kind of thing. An old-fashioned electromagnetic relay is kinda hard to synflood, y'know? The rest of the network runs over leased lines or very long serial cables. Its simplicity makes for great robustness. Be careful what sarcastic nightmare scenarios you cook up: you might just read some senator spewing it all over the front page of a paper... CK -- Chris Kuethe, GCIA: Secure Systems Specialist - U of A CNS office: 157 General Services Bldg. 780.492.8135 chris.kuethe@[pyxis.cns.]ualberta.ca Opinions expressed herein are solely the responsibility of the author. And the author wouldn't have it any other way.
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