Enhancing Apache httpd Logs with mod_logio and mod_log_forensic

[mandy]

No doubt you're already aware of the standard logfiles that Apache httpd creates for you. There's the access log, which tells you every time a request is made to your server. There's also the error log, which makes a note every time something goes wrong or something of interest happens that you should know about.

There are a few things that you can do to make your access log more useful, such as using the combined, rather than the common, logfile format--but that's another article. Look at the documentation for mod_log_config for more information on that.

You may not know that there are several additional logging modules that provide information about certain types of things that happen on your server.

The modules discussed here are available in 2.0 and 2.2, but not in 1.3...

full article: http://www.onlamp.com/pub/a/onlamp/2007/...-logs.html