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40 Chapter 3 Managing Websites

If you are administering a remote server, file service must be running on the remote

server to use the Browse button.

7 Choose a log format from the Format pop-up menu.

8 Edit the format string, if necessary.

Note: The Help button next to the format string opens the Apache documentation

web page (http://httpd.apache.org/docs/mod/mod_log_config.html#formats), which

explains the parameters for format strings.

9 Enter archive, location, and level choices for the error log as desired.

10 Click Save.

Considerations for Naming Website Logs

You have the option of naming separate logs for multiple websites. If you have many

virtual sites on your server, include the virtual host name in the log name for easy

recognition of the logs.

If you have just two virtual hosts, you may want to use a single log (with the default

name the server uses).

Analyzing Log Content

You can search the contents of a log by typing a search term in the Filter field.

You can also use various third-party tools to analyze logs of web server activity. One

useful application is Analog, which can be downloaded free from www.analog.cx.

Using a Log to Detect Suspicious Activity

In some instances, you may discover virus activity by studying a site’s log. For example,

an unusual entry such as “winNT.<xxx>” may indicate that a virus is trying to propagate

itself.

Some warning messages in a log are benign; some are not.

Understanding the Web Service access_log Format

In version 10.4 of Mac OS X Server, the web performance cache does not prevent a

remote client’s IP address from being logged in the access_log. The web performance

cache process now adds an HTTP header named “PC-Remote-Addr” that contains the

client’s IP address before passing a request to the Apache web server.

With the performance cache disabled, the standard log format string on the

CustomLog directive in httpd.conf remains the same as in earlier versions:

%h %l %u %t "%r" %>s %b

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 82 83

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Apache Technologies 14 Manual de usuario Pagina 40