AUDIT_SYSLOG(5)AUDIT_SYSLOG(5)NAMEaudit_syslog - realtime conversion of Solaris audit data to syslog mes‐
The audit_syslog plugin module for Solaris audit, /usr/lib/secu‐
rity/audit_syslog.so, provides realtime conversion of Solaris audit
data to syslog-formatted (text) data and sends it to a syslog daemon as
configured in syslog.conf(4). The plugin's path is specified in the
audit configuration file, audit_control(4).
Messages to syslog are written if selected via the plugin option in
audit_control. Syslog messages are generated with the facility code of
LOG_AUDIT (audit in syslog.conf(4)) and severity of LOG_NOTICE. Audit
syslog messages contain data selected from the tokens described for the
binary audit log. (See audit.log(4)). As with all syslog messages, each
line in a syslog file consists of two parts, a syslog header and a mes‐
The syslog header contains the date and time the message was generated,
the host name from which it was sent, auditd to indicate that it was
generated by the audit daemon, an ID field used internally by syslogd,
and audit.notice indicating the syslog facility and severity values.
The syslog header ends with the characters ], that is, a closing square
bracket and a space.
The message part starts with the event type from the header token. All
subsequent data appears only if contained in the original audit record
and there is room in the 1024-byte maximum length syslog line. In the
following example, the backslash (\) indicates a continuation; actual
syslog messages are contained on one line:
Oct 31 11:38:08 smothers auditd: [ID 917521 audit.notice] chdir(2) ok\
session 401 by joeuser as root:other from myultra obj /export/home
In the preceding example, chdir(2) is the event type. Following this
field is additional data, described below. This data is omitted if it
is not contained in the source audit record.
ok or failed
Comes from the return or exit token.
<#> is the session ID from the subject token.
<name> is the audit ID from the subject token.
<name> is the effective user ID and <group> is the
effective group ID from the subject token.
in <zone name>
The zone name. This field is generated only if the
zonename audit policy is set.
<terminal> is the text machine address from the
<path> is the path from the path token The path
can be truncated from the left if necessary to fit
it on the line. Truncation is indicated by leading
<owner> is the effective user ID of the process
<owner> is the audit ID of the process owner.
The following are example syslog messages:
Nov 4 8:27:07 smothers auditd: [ID 175219 audit.notice] \
Nov 4 9:28:17 smothers auditd: [ID 752191 audit.notice] \
login - rlogin ok session 401 by joeuser as joeuser:staff from myultra
Nov 4 10:29:27 smothers auditd: [ID 521917 audit.notice] \
access(2) ok session 255 by janeuser as janeuser:staff from \
22.214.171.124 obj /etc/passwd
The p_flag attribute, specified by means of the plugin directive (see
audit_control(4)), is used to further filter audit data being sent to
the syslog daemon beyond the classes specified through the flags and
naflags lines of audit_control and through the user-specific lines of
audit_user(4). The parameter is a comma-separated list; each item rep‐
resents an audit class (see audit_class(4)) and is specified using the
same syntax used in audit_control for the flags and naflags lines. The
default (no p_flags listed) is that no audit records are generated.
Example 1 One Use of the plugin Line
In the specification shown below, the plugin line (in conjunction with
flags and naflags) is used to allow class records for lo but allows
class records for am for failures only. Omission of the fm class
records results in no fm class records being output. The pc parameter
has no effect because you cannot add classes to those defined by means
of flags and naflags and by audit_user(4). You can only remove them.
plugin: name=audit_syslog.so; p_flags=lo,-am
Example 2 Use of all
In the specification shown below, with one exception, all allows all
flags defined by means of flags and naflags (and audit_user(4)). The
exception the am metaclass, which is equivalent to ss,as,ua, which is
modified to output all ua events but only failure events for ss and as.
plugin: name=audit_syslog.so; p_flags=all,^+ss,^+as
See attributes(5) for a description of the following attributes:
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
│MT Level │ MT-Safe │
│Interface Stability │ See below. │
The message format and message content are Uncommitted. The configura‐
tion parameters are Committed.
SEE ALSOauditd(1M), audit_class(4), audit_control(4), syslog.conf(4),
System Administration Guide: Security Services
Use of the plugin configuration line to include audit_syslog.so
requires that /etc/syslog.conf is configured to store syslog messages
of facility audit and severity notice or above in a file intended for
Solaris audit records. An example of such a line in syslog.conf is:
Messages from syslog are sent to remote syslog servers by means of UDP,
which does not guarantee delivery or ensure the correct order of
arrival of messages.
If the parameters specified for the plugin line result in no classes
being preselected, an error is reported by means of a syslog alert with
the LOG_DAEMON facility code.
The time field in the syslog header is generated by syslog(3C) and only
approximates the time given in the binary audit log. Normally the time
field shows the same whole second or at most a few seconds difference.
Sep 25, 2008 AUDIT_SYSLOG(5)