ipsec_klipsdebug(5) on Linux
The text 45b272b94c4e, as Debian 3.1 (Sarge) shipped it.
list KLIPS (kernel IPSEC support) debug features and level
The text 45b272b94c4e, as Debian 3.1 (Sarge) shipped it.
list KLIPS (kernel IPSEC support) debug features and level