On Fri, 11 Jul 2008 11:01:33 EDT, Thomas Cross said: > Thanks for testing this. A number of other readers wrote me privately > confirming your result with linux ipchains. I'm not sure what ipchains does > when it encounters a collision, but in general I think this is a good > strategy. You'd have to have many thousands of simultaneous UDP > transactions in order for randomly selected source ports to be colliding > frequently enough for it to present a substantial problem. Birthday paradox strikes again. With 64K source ports, you'll have collisions over 1% of the time at only 1024 in use. With 8K in use, you're hitting collisions 12% of the time.
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