l2tpns(8) on Linux
The text 4435a84ab951, as Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch) shipped it.
Layer 2 tunneling protocol network server (LNS)
Flags it lists
-
-c -
-d -
-h -
-v