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AUDIT(4)		 BSD Kernel Interfaces Manual		      AUDIT(4)

     audit -- Security Event Audit

     options AUDIT

     Security Event Audit is a facility	to provide fine-grained, configurable
     logging of	security-relevant events, and is intended to meet the require-
     ments of the Common Criteria (CC) Common Access Protection	Profile	(CAPP)
     evaluation.  The FreeBSD audit facility implements	the de facto industry
     standard BSM API, file formats, and command line interface, first found
     in	the Solaris operating system.  Information on the user space implemen-
     tation can	be found in libbsm(3).

     Audit support is enabled at boot, if present in the kernel, using an
     rc.conf(5)	flag.  The audit daemon, auditd(8), is responsible for config-
     uring the kernel to perform audit,	pushing	configuration data from	the
     various audit configuration files into the	kernel.

   Audit Special Device
     The kernel	audit facility provides	a special device, /dev/audit, which is
     used by auditd(8) to monitor for audit events, such as requests to	cycle
     the log, low disk space conditions, and requests to terminate auditing.
     This device is not	intended for use by applications.

   Audit Pipe Special Devices
     Audit pipe	special	devices, discussed in auditpipe(4), provide a config-
     urable live tracking mechanism to allow applications to tee the audit
     trail, as well as to configure custom preselection	parameters to track
     users and events in a fine-grained	manner.

   DTrace Audit	Provider
     The DTrace	Audit Provider,	dtaudit(4), allows D scripts to	enable capture
     of	in-kernel audit	records	for kernel audit event types, and then process
     their contents during audit commit	or BSM generation.

     auditreduce(1), praudit(1), audit(2), auditctl(2),	auditon(2),
     getaudit(2), getauid(2), poll(2), select(2), setaudit(2), setauid(2),
     libbsm(3),	auditpipe(4), dtaudit(4), audit.log(5),	audit_class(5),
     audit_control(5), audit_event(5), audit_user(5), audit_warn(5),
     rc.conf(5), audit(8), auditd(8), auditdistd(8)

     The OpenBSM implementation	was created by McAfee Research,	the security
     division of McAfee	Inc., under contract to	Apple Computer Inc. in 2004.
     It	was subsequently adopted by the	TrustedBSD Project as the foundation
     for the OpenBSM distribution.

     Support for kernel	audit first appeared in	FreeBSD	6.2.

     This software was created by McAfee Research, the security	research divi-
     sion of McAfee, Inc., under contract to Apple Computer Inc.  Additional
     authors include Wayne Salamon, Robert Watson, and SPARTA Inc.

     The Basic Security	Module (BSM) interface to audit	records	and audit
     event stream format were defined by Sun Microsystems.

     This manual page was written by Robert Watson <>.

     The FreeBSD kernel	does not fully validate	that audit records submitted
     by	user applications are syntactically valid BSM; as submission of
     records is	limited	to privileged processes, this is not a critical	bug.

     Instrumentation of	auditable events in the	kernel is not complete,	as
     some system calls do not generate audit records, or generate audit
     records with incomplete argument information.

     Mandatory Access Control (MAC) labels, as provided	by the mac(4) facil-
     ity, are not audited as part of records involving MAC decisions.

     Currently the audit syscalls are not supported for	jailed processes.
     However, if a process has audit session state associated with it, audit
     records will still	be produced and	a zonename token containing the	jail's
     ID	or name	will be	present	in the audit records.

BSD				April 28, 2019				   BSD


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