Table 1: Syslog Facility Values
Value	Description
0	Kernel Messages
1	User-Level Messages
2	Mail System
3	System Daemons
4	Security/Authorization Messages*
5	Messages Generated Internally by Syslog
6	Line Printer Subsystem
7	Network News Subsystem
8	UNIX-to-UNIX Copy (UUCP) Subsystem
9	Clock Daemon**
10	Security/Authorization Messages*
11	FTP Daemon
12	NTP Subsystem
13	Log Audit*
14	Log Alert*
15	Clock Daemon**
16	Local Use 0 (Local0)
17	Local Use 1 (Local1)
18	Local Use 2 (Local2)
19	Local Use 3 (Local3)
20	Local Use 4 (Local4)
21	Local Use 5 (Local5)
22	Local Use 6 (Local6)
23	Local Use 7 (Local7)
*Various OSs use values 4, 10, 13, and 14 for security/authorization, audit, and alert messages.
** Various OSs use values 9 and 15 for clock messages.