Switching to VoIP

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Intrusion Prevention and Monitoring

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Project 10.4. Tune Up Asterisk’s Logging Configuration

What you need for this project:

• Asterisk

Log analysis should be the core of your daily system monitoring and security activi-

ties. Like other softPBX servers, Asterisk supports flexible logging, providing several

levels of logging detail in several different files. It also supports using syslog.

By default, Asterisk stores its logs in /var/log/asterisk.

Configuration of Asterisk logging is done in the /etc/asterisk/logger.conf file, which

Asterisk reads at boot time or whenever it is started. The first section of the file is

[general], where you can assign a value to the dateformat option to specify what

date format to use in Asterisk’s logs. To figure out the syntax of the date formats,

read the manpage for

strftime( ) by running man strftime.

The next section,

[logfiles], describes which files should be used for logging out-

put, and how detailed each should be. The syntax for this section is:

filename => level,level,level...

Consider the following logging configuration:

[general]

[logfiles]

messages.log => notice,warning,error

debug.log => notice,warning,error,debug,verbose

In this example, messages.log will contain a digest version of Asterisk’s logging out-

put, while debug.log will get everything ...