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<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Forensic Logging of the requests made to the server</td></tr>
<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td><code class="module"><a href="../mod/mod_unique_id.html">mod_unique_id</a></code> is no longer required since
version 2.1</td></tr></table>
<h3>Summary</h3>
<p>This module provides for forensic logging of client
requests. Logging is done before and after processing a request, so the
forensic log contains two log lines for each request.
The forensic logger is very strict, which means:</p>
<ul>
<li>The format is fixed. You cannot modify the logging format at
runtime.</li>
<li>If it cannot write its data, the child process
exits immediately and may dump core (depending on your
<p>The <code class="directive">ForensicLog</code> directive is used to
log requests to the server for forensic analysis. Each log entry
is assigned a unique ID which can be associated with the request
using the normal <code class="directive"><a href="../mod/mod_log_config.html#customlog">CustomLog</a></code>
directive. <code class="module"><a href="../mod/mod_log_forensic.html">mod_log_forensic</a></code> creates a token called
<code>forensic-id</code>, which can be added to the transfer log
using the <code>%{forensic-id}n</code> format string.</p>
<p>The argument, which specifies the location to which
the logs will be written, can take one of the following two
types of values:</p>
<dl>
<dt><var>filename</var></dt>
<dd>A filename, relative to the <code class="directive"><a href="../mod/core.html#serverroot">ServerRoot</a></code>.</dd>
<dt><var>pipe</var></dt>
<dd>The pipe character "<code>|</code>", followed by the path
to a program to receive the log information on its standard
input. The program name can be specified relative to the <code class="directive"><a href="../mod/core.html#serverroot">ServerRoot</a></code> directive.
<div class="warning"><h3>Security:</h3>
<p>If a program is used, then it will be run as the user who
started <code class="program"><a href="../programs/httpd.html">httpd</a></code>. This will be root if the server was
started by root; be sure that the program is secure or switches to a
less privileged user.</p>
</div>
<div class="note"><h3>Note</h3>
<p>When entering a file path on non-Unix platforms, care should be taken
to make sure that only forward slashed are used even though the platform
may allow the use of back slashes. In general it is a good idea to always
use forward slashes throughout the configuration files.</p>
</div></dd>
</dl>
</div>
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