iodined(8) on Linux
The text cb63f6e7aa03, as Debian 7 (Wheezy) shipped it.
tunnel IPv4 over DNS
Flags it lists
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-D -
-F -
-I -
-L -
-M -
-O -
-P -
-T -
-b -
-c -
-d -
-f -
-h -
-l -
-m -
-n -
-p -
-r -
-s -
-t -
-u -
-v -
-z