facility
This specifies the name of the system that is logging the syslog message. The facility attribute is defined as a string. The way that a message is handled may differ depending on the facility. Each of these facilities help in organizing and routing syslog messages based on their source.
Usually non operating system processes, like Radiator are in the facility local0 to local7.
Available facilities
Facility keywords in syslog are defined as strings. Each facility has a corresponding numerical code. The possible values with their corresponding facility codes are:
kern(0): Kernel messagesuser(1): User-level messagesmail(2): Mail systemdaemon(3): System daemonsauth(4): Security/authentication messagessyslog(5): Messages generated internally by sysloglpr(6): Line printer subsystemnews(7): Network news subsystemuucp(8): UUCP subsystemcron(9): Cron subsystemauthpriv(10): Security/authentication messagesftp(11): FTP daemonntp(12): NTP subsystemsecurity(13): Log auditconsole(14): Log alertsolaris-cron(15): Scheduling daemonlocal0(16): Locally used facility 0local1(17): Locally used facility 1local2(18): Locally used facility 2local3(19): Locally used facility 3local4(20): Locally used facility 4local5(21): Locally used facility 5local6(22): Locally used facility 6local7(23): Locally used facility 7
Note that the mapping between facility codes and keywords is not uniform across different operating systems and syslog implementations. For additional information, refer to your operating system documentation.