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| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>F.3. auth_delay — pause on authentication failure</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="amcheck.html" title="F.2. amcheck — tools to verify table and index consistency" /><link rel="next" href="auto-explain.html" title="F.4. auto_explain — log execution plans of slow queries" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">F.3. auth_delay — pause on authentication failure</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="amcheck.html" title="F.2. amcheck — tools to verify table and index consistency">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="contrib.html" title="Appendix F. Additional Supplied Modules and Extensions">Up</a></td><th width="60%" align="center">Appendix F. Additional Supplied Modules and Extensions</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 16.3 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="auto-explain.html" title="F.4. auto_explain — log execution plans of slow queries">Next</a></td></tr></table><hr /></div><div class="sect1" id="AUTH-DELAY"><div class="titlepage"><div><div><h2 class="title" style="clear: both">F.3. auth_delay — pause on authentication failure <a href="#AUTH-DELAY" class="id_link">#</a></h2></div></div></div><div class="toc"><dl class="toc"><dt><span class="sect2"><a href="auth-delay.html#AUTH-DELAY-CONFIGURATION-PARAMETERS">F.3.1. Configuration Parameters</a></span></dt><dt><span class="sect2"><a href="auth-delay.html#AUTH-DELAY-AUTHOR">F.3.2. Author</a></span></dt></dl></div><a id="id-1.11.7.13.2" class="indexterm"></a><p> |
| <code class="filename">auth_delay</code> causes the server to pause briefly before |
| reporting authentication failure, to make brute-force attacks on database |
| passwords more difficult. Note that it does nothing to prevent |
| denial-of-service attacks, and may even exacerbate them, since processes |
| that are waiting before reporting authentication failure will still consume |
| connection slots. |
| </p><p> |
| In order to function, this module must be loaded via |
| <a class="xref" href="runtime-config-client.html#GUC-SHARED-PRELOAD-LIBRARIES">shared_preload_libraries</a> in <code class="filename">postgresql.conf</code>. |
| </p><div class="sect2" id="AUTH-DELAY-CONFIGURATION-PARAMETERS"><div class="titlepage"><div><div><h3 class="title">F.3.1. Configuration Parameters <a href="#AUTH-DELAY-CONFIGURATION-PARAMETERS" class="id_link">#</a></h3></div></div></div><div class="variablelist"><dl class="variablelist"><dt><span class="term"> |
| <code class="varname">auth_delay.milliseconds</code> (<code class="type">integer</code>) |
| <a id="id-1.11.7.13.5.2.1.1.3" class="indexterm"></a> |
| </span></dt><dd><p> |
| The number of milliseconds to wait before reporting an authentication |
| failure. The default is 0. |
| </p></dd></dl></div><p> |
| These parameters must be set in <code class="filename">postgresql.conf</code>. |
| Typical usage might be: |
| </p><pre class="programlisting"> |
| # postgresql.conf |
| shared_preload_libraries = 'auth_delay' |
|
|
| auth_delay.milliseconds = '500' |
| </pre></div><div class="sect2" id="AUTH-DELAY-AUTHOR"><div class="titlepage"><div><div><h3 class="title">F.3.2. Author <a href="#AUTH-DELAY-AUTHOR" class="id_link">#</a></h3></div></div></div><p> |
| KaiGai Kohei <code class="email"><<a class="email" href="mailto:kaigai@ak.jp.nec.com">kaigai@ak.jp.nec.com</a>></code> |
| </p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="amcheck.html" title="F.2. amcheck — tools to verify table and index consistency">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="contrib.html" title="Appendix F. Additional Supplied Modules and Extensions">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="auto-explain.html" title="F.4. auto_explain — log execution plans of slow queries">Next</a></td></tr><tr><td width="40%" align="left" valign="top">F.2. amcheck — tools to verify table and index consistency </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 16.3 Documentation">Home</a></td><td width="40%" align="right" valign="top"> F.4. auto_explain — log execution plans of slow queries</td></tr></table></div></body></html> |
