syslog-facility-values.txt

0             kernel messages
1 user-level messages
2 mail system
3 system daemons
4 security/authorization messages (note 1)
5 messages generated internally by syslogd
6 line printer subsystem
7 network news subsystem
8 UUCP subsystem
9 clock daemon (note 2)
10 security/authorization messages (note 1)
11 FTP daemon
12 NTP subsystem
13 log audit (note 1)
14 log alert (note 1)
15 clock daemon (note 2)
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)