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Comment by BuildTheRobots

For another fantastic abuse of DNS, the Iodine* project uses DNS to tunnel IP which is just obscene.

http://code.kryo.se/iodine/

(Why? Lots of captive portal wifi hotspots (think hotel/train etc) seem to allow DNS resolutions before stopping your other traffic.)

* DNS uses port 53 which is the same as the atomic number for Iodine ;)

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