42-23
Cisco Security Appliance Command Line Configuration Guide
OL-10088-01
Chapter 42 Monitoring the Security Appliance
Configuring and Managing Logs
Understanding System Log Messages
This section describes the contents of system log messages generated by the security appliance. It
includes the following topics:
• System Log Message Format, page 42-23
• Severity Levels, page 42-23
System Log Message Format
System Log messages begin with a percent sign (%) and are structured as follows:
%PIX|ASA Level Message_number: Message_text
Field descriptions are as follows:
Severity Levels
Table 42-3 lists the system log message severity levels.
Note The security appliance does not generate system log messages with a severity level of 0 (emergencies).
This level is provided in the logging command for compatibility with the UNIX system log feature, but
is not used by the Cisco ASA .
PIX|ASA Identifies the system log message facility code for messages generated by the Cisco
ASA . This value is always PIX|ASA .
Level 1-7. The level reflects the severity of the condition described by the system log
message. The lower the number, the more severe the condition. See Table 42-3 for
more information.
Message_number A unique 6-digit number that identifies the system log message.
Message_text A text string describing the condition. This portion of the system log message
sometimes includes IP addresses, port numbers, or usernames.
Table 42-3 System Log Message Severity Levels
Level
Number Level Keyword Description
0 emergencies System unusable.
1alert Immediate action needed.
2 critical Critical condition.
3 error Error condition.
4 warning Warning condition.
5 notification Normal but significant condition.
6 informational Informational message only.
7 debugging Appears during debugging only.
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