ipsec_klipsdebug(5) on Linux
The text 414ef89110d3, as Debian 4.0 (Etch) shipped it.
list KLIPS (kernel IPSEC support) debug features and level
The text 414ef89110d3, as Debian 4.0 (Etch) shipped it.
list KLIPS (kernel IPSEC support) debug features and level