4.2. Which Log File is Used
4.2. Which Log File is Used In Red Hat Enterprise Linux, the dbus and audit packages are installed by default, unless they are removed from the default package selection. The setroubleshoot-server must be installed using Yum (use the yum install setroubleshoot-server command). If the auditd daemon is running, an SELinux denial message, such as the following, is written to /var/log/audit/audit.log by default: In addition, a message similar to the one below is written to the /var/log/message file: In Red Hat Enterprise Linux 7, setroubleshootd no longer constantly runs as a service. However, it is still used to analyze the AVC messages. Two new programs act as a method to start setroubleshoot when needed: The sedispatch utility runs as a part of the audit subsystem. When an AVC denial message is returned, sedispatch sends a message using dbus . These messages go straight to setroubleshootd if it is already running. If it is not running, sedispatch starts it automatically. The seapplet utility runs in the system toolbar, waiting for dbus messages in setroubleshootd . It launches the notification bubble, allowing the user to review AVC messages. Procedure 4.1. Starting Daemons Automatically To configure the auditd and rsyslog daemons to automatically start at boot, enter the following commands as the root user: To ensure that the daemons are enabled, type the following commands at the shell prompt: Alternatively, use the systemctl status service-name .service command and search for the keyword enabled in the command output, for example: To learn more on how the systemd daemon manages system services, see the Managing System Services chapter in the System Administrator's Guide.
type=AVC msg=audit(1223024155.684:49): avc: denied { getattr } for pid=2000 comm="httpd" path="/var/www/html/file1" dev=dm-0 ino=399185 scontext=unconfined_u:system_r:httpd_t:s0 tcontext=system_u:object_r:samba_share_t:s0 tclass=file May 7 18:55:56 localhost setroubleshoot: SELinux is preventing httpd (httpd_t) "getattr" to /var/www/html/file1 (samba_share_t). For complete SELinux messages. run sealert -l de7e30d6-5488-466d-a606-92c9f40d316d ~]# systemctl enable auditd.service ~]# systemctl enable rsyslog.service ~]USD systemctl is-enabled auditd enabled ~]USD systemctl is-enabled rsyslog enabled ~]USD systemctl status auditd.service | grep enabled auditd.service - Security Auditing Service Loaded: loaded (/usr/lib/systemd/system/auditd.service; enabled )