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LiteSpeed Web Server
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<span class="current"><a href="index.html">Users' Manual</a></span>
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<h3 class="ls-text-muted">Version 6.1 — Rev. 3</h3>
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<article class="contentwrapper ls-col-3-5 clearfix"><div class="nav-bar ls-spacer-micro-top"><div class="prev"> </div><div class="center"><a href="webconsole.html">Web Console</a></div><div class="next"><a href="AdminSecurity_Help.html">Admin Console Security</a> »</div></div>
<h1>Admin Console General</h1><section class="ls-spacer-small-bottom">Admin Server is a special virtual host dedicated to the WebAdmin console.
It is very important to make sure Admin Server is securely protected either by only allowing
access from the administrator's machines or by using an encrypted SSL connection.</section>
<h2 id="top">Table of Contents</h2><section class="toc"><section class="toc-row"><header>General</header><p>
<a href="#enableCoreDump">Enable Core Dump</a> | <a href="#consoleSessionTimeout">Session Timeout (secs)</a></p></section>
<section class="toc-row"><header>Virtual Host Log</header><p>
<a href="#logUseServer">Use Server's Log</a> | <a href="#vhlog_fileName">File Name</a> | <a href="#vhlog_logLevel">Log Level</a> | <a href="#log_rollingSize">Rolling Size (bytes)</a> | <a href="#log_keepDays">Keep Days</a> | <a href="#log_compressArchive">Compress Archive</a></p></section>
<section class="toc-row"><header>Access Log</header><p>
<a href="#aclogUseServer">Log Control</a> | <a href="#vhaccessLog_fileName">File Name</a> | <a href="#accessLog_pipedLogger">Piped Logger</a> | <a href="#accessLog_logFormat">Log Format</a> | <a href="#accessLog_logHeader">Log Headers</a> | <a href="#log_rollingSize">Rolling Size (bytes)</a> | <a href="#log_keepDays">Keep Days</a> | <a href="#log_compressArchive">Compress Archive</a> | <a href="#accessLog_bytesLog">Bytes Log</a></p></section>
</section>
<section><div class="helpitem"><article class="ls-helpitem"><div><header id="enableCoreDump"><h3>Enable Core Dump<span class="ls-permlink"><a href="#enableCoreDump"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies whether to enable core dump when the server is started by "root" user. For most modern Unix systems, processes that change user ID or group ID are not allowed to dump a core file for security reasons. However, it is much easier to identify root cause of a problem with a core dump. This option only works on Linux kernel 2.4 and up. Solaris users should use the <span class="cmd">coreadm</span> command to control this feature.</p> <h4>Syntax</h4><p>Select from radio box</p> <h4>Tips</h4><p><span title="Security" class="ls-icon-security"></span> Only enable this when you see <span class="val">no core file created</span> in the server log file. Disable it immediately after producing the core file. Please submit a bug report when a core dump has been created.</p> </article> </div>
<div class="helpitem"><article class="ls-helpitem"><div><header id="consoleSessionTimeout"><h3>Session Timeout (secs)<span class="ls-permlink"><a href="#consoleSessionTimeout"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Customize the session timeout length of the WebAdmin Console. The default is 60 seconds.</p> <h4>Syntax</h4><p>Integer number</p> <h4>Tips</h4><p><span title="Security" class="ls-icon-security"></span> Set a proper value for production use, usually less than 300 seconds.</p> </article> </div>
<div class="helpitem"><article class="ls-helpitem"><div><header id="logUseServer"><h3>Use Server's Log<span class="ls-permlink"><a href="#logUseServer"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies whether to put log messages from this virtual host into the server log file instead of creating its own log file.</p> <h4>Syntax</h4><p>Select from radio box</p> </article> </div>
<div class="helpitem"><article class="ls-helpitem"><div><header id="vhlog_fileName"><h3>File Name<span class="ls-permlink"><a href="#vhlog_fileName"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies the path for the log file.</p> <h4>Syntax</h4><p>Filename which can be an absolute path or a relative path to $SERVER_ROOT, $VH_ROOT.</p> <h4>Tips</h4><p><span title="Performance" class="ls-icon-performance"></span> Place the log file on a separate disk.</p> </article> </div>
<div class="helpitem"><article class="ls-helpitem"><div><header id="vhlog_logLevel"><h3>Log Level<span class="ls-permlink"><a href="#vhlog_logLevel"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies the level of logging. Available levels (from high to low) are <span class="val">ERROR</span>, <span class="val">WARNING</span>, <span class="val">NOTICE</span>, <span class="val">INFO</span>, and <span class="val">DEBUG</span>. Only messages with a level higher than or equal to the current setting will be logged. If you want to set it to DEBUG</span>, you must set the server log level to <span class="val">DEBUG</span> as well. The level of debugging is controlled solely at the server level by <span class="tagl"><a href="ServGeneral_Help.html#log_debugLevel">Debug Level</a></span>.</p> <h4>Syntax</h4><p>Select from drop down list</p> <h4>Tips</h4><p><span title="Performance" class="ls-icon-performance"></span> Unless <span class="tagl"><a href="ServGeneral_Help.html#log_debugLevel">Debug Level</a></span> is set to a level other than <span class="val">NONE</span>, <span class="val">DEBUG</span> log level does not have any performance impact and is recommended.</p> <h4>See Also</h4><p class="ls-text-small"><span class="tagl"><a href="ServGeneral_Help.html#log_debugLevel">Debug Level</a></span></p> </article> </div>
<div class="helpitem"><article class="ls-helpitem"><div><header id="log_rollingSize"><h3>Rolling Size (bytes)<span class="ls-permlink"><a href="#log_rollingSize"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies when the current log file needs to be rolled over, also known as log rotation. When the file size is over the rollover limit, the active log file will be renamed to log_name.mm_dd_yyyy(.sequence) in the same directory and a new active log file will be created. The actual size of the rotated log file once it is created will sometimes be a little bigger than this size limit. Set to <span class="val">0</span> to disable log rotation.</p> <h4>Syntax</h4><p>Integer number</p> <h4>Tips</h4><p><span title="Information" class="ls-icon-info"></span> Append "K", "M", "G" to the number for kilo-, mega- and giga- bytes.</p> </article> </div>
<div class="helpitem"><article class="ls-helpitem"><div><header id="log_keepDays"><h3>Keep Days<span class="ls-permlink"><a href="#log_keepDays"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies how many days the access log file will be kept on disk. Only rotated log files older than the specified number of days will be deleted. The current log file will not be touched regardless how many days worth of data it contains. If you do not want to auto-delete stale and very old log files, set this to <span class="val">0</span>.</p> <h4>Syntax</h4><p>Integer number</p> </article> </div>
<div class="helpitem"><article class="ls-helpitem"><div><header id="log_compressArchive"><h3>Compress Archive<span class="ls-permlink"><a href="#log_compressArchive"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies whether to compress rotated log files in order to save disk space.</p> <h4>Syntax</h4><p>Select from radio box</p> <h4>Tips</h4><p><span title="Information" class="ls-icon-info"></span> Log files are highly compressible and this is recommended to reduce disk usage for old logs.</p> </article> </div>
<div class="helpitem"><article class="ls-helpitem"><div><header id="aclogUseServer"><h3>Log Control<span class="ls-permlink"><a href="#aclogUseServer"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Where the access log should be written. There are three options: <ol> <li>Write to the server's access log</li> <li>Create an access log for this virtual host</li> <li>Disable access logging</li> </ol></p> <h4>Syntax</h4><p>Select from drop down list</p> </article> </div>
<div class="helpitem"><article class="ls-helpitem"><div><header id="vhaccessLog_fileName"><h3>File Name<span class="ls-permlink"><a href="#vhaccessLog_fileName"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>The access log filename.</p> <h4>Syntax</h4><p>Filename which can be an absolute path or a relative path to $SERVER_ROOT, $VH_ROOT.</p> <h4>Tips</h4><p><span title="Performance" class="ls-icon-performance"></span> Put access log file on a separate disk.</p> </article> </div>
<div class="helpitem"><article class="ls-helpitem"><div><header id="accessLog_pipedLogger"><h3>Piped Logger<span class="ls-permlink"><a href="#accessLog_pipedLogger"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies the external application that will receive the access log data sent by LiteSpeed through a pipe on its STDIN stream (file handle is 0). When this field is specified, the access log will be sent only to the logger application and not the access log file specified in previous entry.<br/><br/> The logger application must be defined in <span class="tagP"><a href="#ExtApp_Help">External Apps</a></span> section first. Server-level access logging can only use an external logger application defined at the server level. Virtual host-level access logging can only use a logger application defined at the virtual host level.<br/><br/> The logger process is spawned in the same way as other external (CGI/FastCGI/LSAPI) processes. This means it will execute as the user ID specified in the virtual host's <span class="tagl"><a href="VirtualHosts_Help.html#setUidMode">External App Set UID Mode</a></span> settings and will never run on behalf of a privileged user. <br/><br/> LiteSpeed web server performs simple load balancing among multiple logger applications if more than one instance of a logger application is configured. LiteSpeed server always attempts to keep the number of logger applications as low as possible. Only when one logger application fails to process access log entries in time will the server attempt to spawn another instance of the logger application. <br/><br/> If a logger crashes, the web server will start another instance but the log data in the stream buffer will be lost. It is possible to lose log data if external loggers cannot keep up with the speed and volume of the log stream.</p> <h4>Syntax</h4><p>Select from drop down list</p> </article> </div>
<div class="helpitem"><article class="ls-helpitem"><div><header id="accessLog_logFormat"><h3>Log Format<span class="ls-permlink"><a href="#accessLog_logFormat"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p><span class="tag">Enterprise Edition Only</span> Specifies the log format for the access log. When log format is set, it will override the <span class="tagl"><a href="#accessLog_logHeader">Log Headers</a></span> setting.</p> <h4>Syntax</h4><p>String. The syntax of log format is compatible with Apache 2.0's custom <a href="http://httpd.apache.org/docs/current/mod/mod_log_config.html#formats" target="_blank" rel="noopener noreferrer">log format</a>.</p> <h4>Example</h4><div class="ls-example"><b>Common Log Format (CLF)</b><br/> "%h %l %u %t \"%r\" %>s %b"<br/><br/> <b>Common Log Format with Virtual Host</b><br/> "%v %h %l %u %t \"%r\" %>s %b"<br/><br/> <b>NCSA extended/combined log format</b><br/> "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-agent}i\" <br/><br/> <b>Log cookie value of Foobar</b><br/> "%{Foobar}C"</div><h4>See Also</h4><p class="ls-text-small"><span class="tagl"><a href="#accessLog_logHeader">Log Headers</a></span></p> </article> </div>
<div class="helpitem"><article class="ls-helpitem"><div><header id="accessLog_logHeader"><h3>Log Headers<span class="ls-permlink"><a href="#accessLog_logHeader"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies whether to log HTTP request headers: <span class="val">Referer</span>, <span class="val">UserAgent</span>, and <span class="val">Host</span>.</p> <h4>Syntax</h4><p>Select from checkbox</p> <h4>Tips</h4><p><span title="Performance" class="ls-icon-performance"></span> Turn this off if you do not need these headers in the access log.</p> <h4>See Also</h4><p class="ls-text-small"><span class="tagl"><a href="#accessLog_logFormat">Log Format</a></span></p> </article> </div>
<div class="helpitem"><article class="ls-helpitem"><div><header id="accessLog_bytesLog"><h3>Bytes Log<span class="ls-permlink"><a href="#accessLog_bytesLog"></a></span><span class="top"><a href="#top">⇑</a></span></h3></header></div><h4>Description</h4><p>Specifies the path to the bandwidth bytes log file. When specified, a cPanel compatible bandwidth log will be created. This will log the total bytes transferred for a request including both the request and reply bodies.</p> <h4>Syntax</h4><p>Filename which can be an absolute path or a relative path to $SERVER_ROOT.</p> <h4>Tips</h4><p><span title="Performance" class="ls-icon-performance"></span> Put the log file on a separate disk.</p> </article> </div>
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