Syslog

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syslog
Transport: UDP
Portnumber: 514
RFC: RFC 3164 RFC 3195

Syslog is a method for delivering log information from a sender to a receiver, typically across and IP network. The term syslog can be used to describe the protocol that is used to transfer messages, the application to send or receive the messages as well as the logs messages themselves.

Facility values

Syslog facility values
Code Name RFC 3164 facility FreeBSD facility
0 kern Kernel messages Kernel messages
1 user User-level messages User-level messages
2 mail Mail messages Mail system
3 daemon System daemons System Daemons
4 auth Security and Authorisation Security and Authorisation
5 syslog Messages generated by syslogd Messages generated by syslogd
6 lpr Line Printer subsystem Line Printer subsystem
7 news Network News subsystem Network News subsystem
8 uucp UUCP subsystem UUCP subsystem
9 cron Clock daemon Clock daemon
10 authpriv Security and Authorisation Security and Authorisation
11 ftp FTP daemon FTP daemon
12 ntp Network Time Protocol Network Time Protocol
13 - Log audit -
14 - Log alert -
15 - Clock daemon Kernel messages
16 local0 Local use 0 Local use 0
17 local1 Local use 1 Local use 1
18 local2 Local use 2 Local use 2
19 local3 Local use 3 Local use 3
20 local4 Local use 4 Local use 4
21 local5 Local use 5 Local use 5
22 local6 Local use 6 Local use 6
23 local7 Local use 7 Local use 7

Priority values

Syslog priority values
Priority Name
None No priority
0 Emerg (Emergency)
1 Alert
2 Crit (Critical)
3 Err (Error)
error Same as 3 err
4 Warn (Warning)
warn Same as 4 warn
5 Notice
6 Info
7 Debug

Links

Security