ocat(1) on Linux
The text 7715a2b0215c, as Debian 7 (Wheezy) shipped it.
OnionCat creates a transparent IPv6 layer on top of Tor's hidden services. gcat - GarliCat is like OnionCat but it works with I2P instead of Tor.
Flags it lists
-
-4 -
-B -
-C -
-I -
-L -
-R -
-T -
-a -
-b -
-d -
-h -
-i -
-l -
-p -
-r -
-s -
-t -
-u