nufw(8) on Linux
The text b91bc831eb0f, as Debian 5.0 (Lenny) shipped it.
NUFW User filtering gateway server
Flags it lists
-
-A -
-C -
-D -
-M -
-T -
-U -
-V -
-a -
-c -
-d -
-h -
-k -
-m -
-p -
-t -
-v