auditd(8) [centos man page]
AUDITD(8) System Administration Utilities AUDITD(8) NAME
auditd - The Linux Audit daemon SYNOPSIS
auditd [-f] [-l] [-n] [-s disable|enable|nochange] DESCRIPTION
auditd is the userspace component to the Linux Auditing System. It's responsible for writing audit records to the disk. Viewing the logs is done with the ausearch or aureport utilities. Configuring the audit rules is done with the auditctl utility. During startup, the rules in /etc/audit/audit.rules are read by auditctl and loaded into the kernel. Alterately, there is also an augenrules program that reads rules located in /etc/audit/rules.d/ and compiles them into an audit.rules file. The audit daemon itself has some configuration options that the admin may wish to customize. They are found in the auditd.conf file. OPTIONS
-f leave the audit daemon in the foreground for debugging. Messages also go to stderr rather than the audit log. -l allow the audit daemon to follow symlinks for config files. -n no fork. This is useful for running off of inittab or systemd. -s=ENABLE_STATE specify when starting if auditd should change the current value for the kernel enabled flag. Valid values for ENABLE_STATE are "dis- able", "enable" or "nochange". The default is to enable (and disable when auditd terminates). The value of the enabled flag may be changed during the lifetime of auditd using 'auditctl -e'. SIGNALS
SIGHUP causes auditd to reconfigure. This means that auditd re-reads the configuration file. If there are no syntax errors, it will proceed to implement the requested changes. If the reconfigure is successful, a DAEMON_CONFIG event is recorded in the logs. If not success- ful, error handling is controlled by space_left_action, admin_space_left_action, disk_full_action, and disk_error_action parameters in auditd.conf. SIGTERM caused auditd to discontinue processing audit events, write a shutdown audit event, and exit. SIGUSR1 causes auditd to immediately rotate the logs. It will consult the max_log_size_action to see if it should keep the logs or not. SIGUSR2 causes auditd to attempt to resume logging. This is usually needed after logging has been suspended. FILES
/etc/audit/auditd.conf - configuration file for audit daemon /etc/audit/audit.rules - audit rules to be loaded at startup /etc/audit/rules.d/ - directory holding individual sets of rules to be compiled into one file by augenrules. NOTES
A boot param of audit=1 should be added to ensure that all processes that run before the audit daemon starts is marked as auditable by the kernel. Not doing that will make a few processes impossible to properly audit. The audit daemon can receive audit events from other audit daemons via the audisp-remote audispd plugin. The audit daemon may be linked with tcp_wrappers to control which machines can connect. If this is the case, you can add an entry to hosts.allow and deny. SEE ALSO
auditd.conf(5), audispd(8), ausearch(8), aureport(8), auditctl(8), augenrules(8), audit.rules(7). AUTHOR
Steve Grubb Red Hat Sept 2013 AUDITD(8)
Check Out this Related Man Page
audit(1M) audit(1M) NAME
audit - control the behavior of the audit daemon SYNOPSIS
audit -n | -s | -t | -v [path] The audit command is the system administrator's interface to maintaining the audit trail. The audit daemon can be notified to read the con- tents of the audit_control(4) file and re-initialize the current audit directory to the first directory listed in the audit_control file or to open a new audit file in the current audit directory specified in the audit_control file, as last read by the audit daemon. Reading audit_control also causes the minfree and plugin configuration lines to be re-read and reset within auditd. The audit daemon can also be signaled to close the audit trail and disable auditing. -n Notify the audit daemon to close the current audit file and open a new audit file in the current audit directory. -s Notify the audit daemon to read the audit control file. The audit daemon stores the information internally. If the audit daemon is not running but audit has been enabled by means of bsmconv(1M), the audit daemon is started. -t Direct the audit daemon to close the current audit trail file, disable auditing, and die. Use -s to restart auditing. -v path Verify the syntax for the audit control file stored in path. The audit command displays an approval message or outputs specific error messages for each error found. The audit command will exit with 0 upon success and a positive integer upon failure. /etc/security/audit_user /etc/security/audit_control See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |Stability |Evolving | +-----------------------------+-----------------------------+ bsmconv(1M), praudit(1M), audit(2), audit_control(4), audit_user(4), attributes(5) The functionality described in this man page is available only if the Basic Security Module (BSM) has been enabled. See bsmconv(1M) for more information. The audit command does not modify a process's preselection mask. It functions are limited to the following: o affects which audit directories are used for audit data storage; o specifies the minimum free space setting; o resets the parameters supplied by means of the plugin directive. For the -s option, audit validates the audit_control syntax and displays an error message if a syntax error is found. If a syntax error message is displayed, the audit daemon does not re-read audit_control. Because audit_control is processed at boot time, the -v option is provided to allow syntax checking of an edited copy of audit_control. Using -v, audit exits with 0 if the syntax is correct; otherwise, it returns a positive integer. The -v option can be used in any zone, but the -t, -s, and -n options are valid only in local zones and, then, only if the perzone audit policy is set. See auditd(1M) and auditconfig(1M) for per-zone audit configuration. 25 May 2004 audit(1M)