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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>21.13. PAM Authentication</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="auth-cert.html" title="21.12. Certificate Authentication" /><link rel="next" href="auth-bsd.html" title="21.14. BSD Authentication" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">21.13. PAM Authentication</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="auth-cert.html" title="21.12. Certificate Authentication">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="client-authentication.html" title="Chapter 21. Client Authentication">Up</a></td><th width="60%" align="center">Chapter 21. Client Authentication</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="auth-bsd.html" title="21.14. BSD Authentication">Next</a></td></tr></table><hr /></div><div class="sect1" id="AUTH-PAM"><div class="titlepage"><div><div><h2 class="title" style="clear: both">21.13. PAM Authentication <a href="#AUTH-PAM" class="id_link">#</a></h2></div></div></div><a id="id-1.6.8.20.2" class="indexterm"></a><p> |
| This authentication method operates similarly to |
| <code class="literal">password</code> except that it uses PAM (Pluggable |
| Authentication Modules) as the authentication mechanism. The |
| default PAM service name is <code class="literal">postgresql</code>. |
| PAM is used only to validate user name/password pairs and optionally the |
| connected remote host name or IP address. Therefore the user must already |
| exist in the database before PAM can be used for authentication. For more |
| information about PAM, please read the |
| <a class="ulink" href="https://www.kernel.org/pub/linux/libs/pam/" target="_top"> |
| <span class="productname">Linux-PAM</span> Page</a>. |
| </p><p> |
| The following configuration options are supported for PAM: |
| </p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="literal">pamservice</code></span></dt><dd><p> |
| PAM service name. |
| </p></dd><dt><span class="term"><code class="literal">pam_use_hostname</code></span></dt><dd><p> |
| Determines whether the remote IP address or the host name is provided |
| to PAM modules through the <code class="symbol">PAM_RHOST</code> item. By |
| default, the IP address is used. Set this option to 1 to use the |
| resolved host name instead. Host name resolution can lead to login |
| delays. (Most PAM configurations don't use this information, so it is |
| only necessary to consider this setting if a PAM configuration was |
| specifically created to make use of it.) |
| </p></dd></dl></div><p> |
| </p><div class="note"><h3 class="title">Note</h3><p> |
| If PAM is set up to read <code class="filename">/etc/shadow</code>, authentication |
| will fail because the PostgreSQL server is started by a non-root |
| user. However, this is not an issue when PAM is configured to use |
| LDAP or other authentication methods. |
| </p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="auth-cert.html" title="21.12. Certificate Authentication">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="client-authentication.html" title="Chapter 21. Client Authentication">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="auth-bsd.html" title="21.14. BSD Authentication">Next</a></td></tr><tr><td width="40%" align="left" valign="top">21.12. Certificate Authentication </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"> 21.14. BSD Authentication</td></tr></table></div></body></html> |
