http://netbsd.i2p/docs/guide/en/chap-veriexec.html
Strict levels Since different people might want to use Veriexec for
different purposes, we also define four strict levels, ranging
0-3, and named “ learning ” , “ IDS ” , “ IPS ” , and “ lockdown ” modes. In strict level 0 , learning
mode, Veriexec will act passively and simply warn about any
anomalies.