плагин диспетчера аудита удаленных служб z / OS (z/OS Remote-services Audit dispatcher plugin)
Имя (Name)
audispd-zos-remote - z/OS Remote-services Audit dispatcher plugin
Синопсис (Synopsis)
audispd-zos-remote [ config-file ]
Описание (Description)
audispd-zos-remote is a remote-auditing plugin for the Audit
subsystem. It should be started by the auditd(8) daemon and will
forward all incoming audit events, as they happen, to a
configured z/OS SMF (Service Management Facility) database,
through an IBM Tivoli Directory Server (ITDS) set for Remote
Audit service. See SMF MAPPING section below for more
information about the resulting SMF record format.
auditd(8) must be configured to start the plugin. This is done by
a configuration file usually located at
/etc/audit/plugins.d/audispd-zos-remote.conf, but multiple
instances can be spawned by having multiple configuration files
in /etc/audit/plugins.d for the same plugin executable (see
auditd(8)).
Each instance needs a configuration file, located by default at
/etc/audit/zos-remote.conf. Check zos-remote.conf(5) for details
about the plugin configuration.
Параметры (Options)
config-file
Use an alternate configuration file instead of
/etc/audit/zos-remote.conf.
Сигналы (Signals)
audispd-zos-remote reacts to SIGTERM and SIGHUP signals
(according to the auditd(8) specification):
SIGHUP Instructs the audispd-zos-remote plugin to re-read it's
configuration and flush existing network connections.
SIGTERM
Performs a clean exit. audispd-zos-remote will wait up to
10 seconds if there are queued events to be delivered,
dropping any remaining queued events after that time.
IBM z/OS ITDS Server and RACF configuration
In order to use this plugin, you must have an IBM z/OS v1R8 (or
higher) server with IBM Tivoli Directory Server (ITDS) configured
for Remote Audit service. For more detailed information about how
to configure the z/OS server for Remote Auditing, refer to z/OS
V1R8.0-9.0 Integrated Security Services Enterprise Identity
Mapping (EIM) Guide and Reference
(http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/FRAMESET/EIMA1140/CCONTENTS?DT=20070827115119 ),
chapter "2.0 - Working with remote services".
Enable ITDS to process Remote Audit requests
To enable ITSD to process Remote Audit requests, the user ID
associated with ITDS must be granted READ access to the
IRR.AUDITX FACILITY Class profile (the profile used to protect
the R_Auditx service). This user ID can usually be found in the
STARTED Class profile for the ITDS started procedure. If the
identity associated with ITDS is ITDSUSER, the administrator can
configure RACF to grant Remote Auditing processing to ITDS with
the following TSO commands:
TSO Commands: Grant ITDSUSER READ access to IRR.AUDITX FACILITY
Class profile
rdefine FACILITY IRR.RAUDITX uacc(none)
permit IRR.RAUDITX class(FACILITY) id(ITDSUSER) access(READ)
Create/enable RACF user ID to perform Remote Audit requests
A z/OS RACF user ID is needed by the plugin - Every Audit request
performed by the plugin will use a RACF user ID, as configured in
the plugin configuration zos-remote.conf(5). This user ID needs
READ access to FACILITY Class resource IRR.LDAP.REMOTE.AUDIT. If
the user ID is BINDUSER, the administrator can configure RACF to
enable this user to perform Remote Auditing requests with the
following TSO commands:
TSO Commands: Enable BINDUSER to perform Remote Audit requests
rdefine FACILITY IRR.LDAP.REMOTE.AUDIT uacc(none)
permit IRR.LDAP.REMOTE.AUDIT class(FACILITY) id(BINDUSER) access(READ)
Add @LINUX Class to RACF
When performing remote auditing requests, the audispd-zos-remote
plugin will use the special @LINUX CDT Class and the audit record
type (eg.: SYSCALL, AVC, PATH...) as the CDT Resource Class for
all events processed. To make sure events are logged, the RACF
server must be configured with a Dynamic CDT Class named @LINUX
with correct sizes and attributes. The following TSO commands can
be used to add this class:
TSO Commands: Add @LINUX CDT Class
rdefine cdt @LINUX cdtinfo(posit(493) FIRST(alpha,national,numeric,special) OTHER(alpha,national,numeric,special) RACLIST(REQUIRED) case(asis) generic(allowed) defaultuacc(none) maxlength(246))
setr classact(cdt)
setr raclist(cdt)
setr raclist(cdt) refresh
setr classact(@LINUX)
setr raclist(@LINUX)
setr generic(@LINUX)
Add profiles to the @LINUX Class
Once the CDT Class has been defined, you can add profiles to it,
specifying resources (wildcards allowed) to log or ignore. The
following are examples:
TSO Commands: Log only AVC records (One generic and one discrete
profile):
rdefine @LINUX * uacc(none) audit(none(read))
rdefine @LINUX AVC uacc(none) audit(all(read))
setr raclist(@LINUX) refresh
TSO Commands: Log everything (One generic profile):
rdefine @LINUX * uacc(none) audit(all(read))
setr raclist(@LINUX) refresh
Resources always match the single profile with the best match.
There are many other ways to define logging in RACF. Please refer
to the server documentation for more details.
SMF Mapping
The ITDS Remote Audit service will cut SMF records of type 83
subtype 4 every time it processes a request. This plugin will
issue a remote audit request for every incoming Linux Audit
record (meaning that one Linux record will map to one SMF
record), and fill this type's records with the following:
Link Value
The Linux event serial number, encoded in network-byte order
hexadecimal representation. Records within the same Event share
the same Link Value.
Violation
Always zero (0) - False
Event Code
Always two (2) - Authorization event
Event Qualifier
Zero (0) - Success, if the event reported success=yes or
res=success, Three (3) - Fail, if the event reported success=no
or res=failed, or One (1) - Info otherwise.
Class
Always @LINUX
Resource
The Linux record type for the processed record. e.g.:
SYSCALL,AVC,PATH,CWD etc.
Log String
Textual message bringing the RACF user ID used to perform the
request, plus the Linux hostname and the record type for the
first record in the processed event. e.g.: Remote audit request
from RACFUSER. Linux (hostname.localdomain):USER_AUTH
Data Field List
Also known as relocates, this list will bring all the field names
and values in a fieldname=value format, as a type 114
(Application specific Data) relocate. The plug-in will try to
interpret those fields (i.e.: use human-readable username root
instead of numeric userid 0) whenever possible. Currently, this
plugin will also add a relocate type 113 (Date And Time Security
Event Occurred) with the Event Timestamp in the format as
returned by ctime(3).
Ошибки (Error)
Errors and warnings are reported to syslog (under DAEMON
facility). In situations where the event was submitted but the
z/OS server returned an error condition, the logged message
brings a name followed by a human-readable description. Below are
some common errors conditions:
NOTREQ - No logging required
Resource (audit record type) is not set to be logged in
the RACF server - The @LINUX Class profile governing this
audit record type is set to ignore. See IBM z/OS RACF
Server configuration
UNDETERMINED - Undetermined result
No profile found for specified resource. There is no
@LINUX Class configured or no @LINUX Class profile
associated with this audit record type. See IBM z/OS RACF
Server configuration
UNAUTHORIZED - The user does not have authority the R_auditx
service
The user ID associated with the ITDS doesn't have READ
access to the IRR.AUDITX FACILITY Class profile. See IBM
z/OS RACF Server configuration
UNSUF_AUTH - The user has unsufficient authority for the
requested function
The RACF user ID used to perform Remote Audit requests (as
configured in zos-remote.conf(5)) don't have access to the
IRR.LDAP.REMOTE.AUDIT FACILITY Class profile. See IBM z/OS
RACF Server configuration
Ошибки (баги) (Bugs)
The plugin currently does remote auditing in a best-effort basis,
and will discard events in case the z/OS server cannot be
contacted (network failures) or in any other case that event
submission fails.
Файлы (Files)
/etc/audit/plugins.d/audispd-zos-remote.conf
/etc/audit/zos-remote.conf
Смотри также (See also)
auditd(8), zos-remote.conf(5).
