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dxaudit(8X) dxaudit(8X) NAME dxaudit - Motif Interface for the Audit Subsystem SYNOPSIS /usr/tcb/bin/dxaudit DESCRIPTION The dxaudit application is a Motif graphical user interface which can be used to administer the audit subsystem. Three major areas comprise the audit subsystem: Control, Collection, and Reporting. Currently, dxaudit supports Collection and Reporting only. See the auditd(8) ref- erence page for details on administering the Control function. In order to invoke dxaudit, you must be the root user. Audit Event Overview Audit events are comprised of the following types: System calls include all entry points into the UNIX kernel including habitat events which are denoted by the <habitat name>/<system call>, like `SystemV/open'. Trusted events are application-defined events which represent higher level activity. For example, login is a trusted event. To audit a user login at the system call level would produce many audit events, whereas to audit the login event would capture essentially the same in- formation in a very concise way. Site events provide a mechanism for a site to extend the audit subsystem's list of audit events. Site events can be defined in /etc/sec/site_events. A site event can contain subevents which are finer-grained audit events within a site event. In addition to these events, the administrator can also combine any of the above events into an event alias. An alias can also reference other aliases. Aliases are stored in /etc/sec/event_aliases. For each event, the administrator can specify whether successful occur- rences, failed occurrences or both are audited or used in a selection against a particular audit log. dxaudit presents audit events in specialized Motif widgets that are de- signed to manage audit events. Alias events are presented in one list and system calls, trusted events, and site events are presented in a list called Base/Site Events. Once an event is selected, the auditing of Successful or Failed occurrences can be set. The lists can be man- aged in a global fashion such that by clicking one button the entire list is changed -- either by selecting or unselecting the list of events or by switching the settings of the Success or Failure toggle buttons. In addition, dxaudit provides interaction between aliases and base/site events according to the following rules: When an alias is se- lected, all of the events in that alias are also selected. By default, the per-event Success/Failure setting will be to use what is contained in the alias file. Whenever the Success/Failure setting is changed on an alias, all Success/Failure settings for the events in that alias will change to the same setting. When a Base/Site event is unselected such that a Selected Alias is no longer a true representation, the alias will be unselected. dxaudit also allows the saving and restoring of event masks in files so that frequently used event masks can be easily recalled. By default, dxaudit presents the list of security relevant events as presented in /etc/sec/audit_events on system installation. The adminis- trator can configure dxaudit to use the entire list of audit events by using the auditUseSecEvents X resource. See the X RESOURCES section below for details. If during execution, dxaudit encounters an unrecog- nized event from querying some event mask, the user will be asked if dxaudit should use full event mode or security relevant event mode. Collection Functions The Current System Mask is the system-wide event mask and style set- tings currently in effect. A system event mask can contain all event types except sub-events to site events. This screen allows the admin- istrator to query and change the current system mask, and auditing styles (see auditmask(8) reference page). dxaudit also provides a screen via Edit->Object Selection/Deselection to access the capability to select or deselect audit records regarding file activity before they are stored in the audit trail. The Default System Mask is the value of the AUDITMASK_FLAG vari- able as stored in the /etc/rc.config file. This is essentially the default value of the system mask each time the system is booted. The event mask and audit styles can be queried and saved from this screen. If dxaudit detects that an event mask is exactly represented by a loaded/saved file on the system, then it will ask the administrator if the default system mask should reference the file name in the AUDITMASK_FLAG variable or supply the contents of the file in the AUDITMASK_FLAG variable. The former method provides a level of indirection so that the admin- istrator could maintain the default mask by editing a file. This screen presents a list of the current active processes on the system. The administrator can choose a process or a group of processes running as the same login user (same AUID), query its current event mask and audit control flags, and change them as necessary. For active processes, the event mask cannot con- tain habitat events or site events; however, a global option to audit habitat events can be set. Also, system call event audit- ing can be globally turned off. Reporting Functions This screen allows the administrator to create, modify, or delete se- lection files. Selection files contain parameters which indicate how audit records will be selected from the raw audit trail during report generation. The selection parameters include things like time inter- val, audit events, user id. Any audit record matching the selection criteria will be displayed. All types of audit events can be used in a selection file. This screen allows the administrator to create, mod- ify, or delete deselection files. A deselection file consists of tu- ples. The tuple is comprised of a host, audit ID, real UID, event, file pathname, and access mode. A deselection file can be used to fur- ther reduce audit records when generating reports. It can be used in combination with a selection file. Any audit record matching the dese- lection criteria will be filtered out from the report stream. This screen allows the administrator to view an audit report. A selection file, a deselection file, and an audit log can be selected to generate a report. Output options include generating a report to a file, to a series of files sorted by audit ID, to a window on the screen, or if audit is currently enabled, to follow the current activity. Report records can be in brief format or long format. If in brief format, the administrator can double click on the record and get a pop-up of the long format. X RESOURCES This resource changes the list of events loaded into all list boxes with the Base/Site Events heading. Setting the value to True will use only security relevant audit events (the set found in /etc/sec/au- dit_events). Setting the value to False will make dxaudit use all events on the system. This includes all system calls, non-system events, etc. It will slightly impact performance on screen mapping of those screens containing the event list boxes. It is recommended that security relevant events be used. The default value of this resource is true. This resource changes the display of the Active Process List from the Modify Active Process Mask screen. Refer to the ps(1) refer- ence page for additional information. This resource changes the sorted order of the ps(1) output in the Modify Active Process Mask screen. Valid options are: for ps(1) native order for alphabetic ordering by user name. This is the default value. This resource tells dxaudit how many 256K chunks of memory it can allocate when receiving audit report data from audit_tool. When the length of the report exceeds this amount of memory, the oldest 256K chunk of data is discarded as long as the user is not viewing it at the moment. This discarded chunk cannot be accessed again unless the report is regenerated. The default setting for this resource is 20. FILES System-wide X Resource file. Security relevant audit events Site spe- cific audit events. Audit event alias specification file. Directory containing the audit selection files. Directory containing the audit deselection files. SEE ALSO auditd(8), auditmask(8), audit_tool(8), audit_setup(8) dxaudit(8X)