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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>21.11. RADIUS 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-ldap.html" title="21.10. LDAP Authentication" /><link rel="next" href="auth-cert.html" title="21.12. Certificate 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">21.11. RADIUS Authentication</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="auth-ldap.html" title="21.10. LDAP 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-cert.html" title="21.12. Certificate Authentication">Next</a></td></tr></table><hr /></div><div class="sect1" id="AUTH-RADIUS"><div class="titlepage"><div><div><h2 class="title" style="clear: both">21.11. RADIUS Authentication <a href="#AUTH-RADIUS" class="id_link">#</a></h2></div></div></div><a id="id-1.6.8.18.2" class="indexterm"></a><p> |
| This authentication method operates similarly to |
| <code class="literal">password</code> except that it uses RADIUS |
| as the password verification method. RADIUS is used only to validate |
| the user name/password pairs. Therefore the user must already |
| exist in the database before RADIUS can be used for |
| authentication. |
| </p><p> |
| When using RADIUS authentication, an Access Request message will be sent |
| to the configured RADIUS server. This request will be of type |
| <code class="literal">Authenticate Only</code>, and include parameters for |
| <code class="literal">user name</code>, <code class="literal">password</code> (encrypted) and |
| <code class="literal">NAS Identifier</code>. The request will be encrypted using |
| a secret shared with the server. The RADIUS server will respond to |
| this request with either <code class="literal">Access Accept</code> or |
| <code class="literal">Access Reject</code>. There is no support for RADIUS accounting. |
| </p><p> |
| Multiple RADIUS servers can be specified, in which case they will |
| be tried sequentially. If a negative response is received from |
| a server, the authentication will fail. If no response is received, |
| the next server in the list will be tried. To specify multiple |
| servers, separate the server names with commas and surround the list |
| with double quotes. If multiple servers are specified, the other |
| RADIUS options can also be given as comma-separated lists, to provide |
| individual values for each server. They can also be specified as |
| a single value, in which case that value will apply to all servers. |
| </p><p> |
| The following configuration options are supported for RADIUS: |
| </p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="literal">radiusservers</code></span></dt><dd><p> |
| The DNS names or IP addresses of the RADIUS servers to connect to. |
| This parameter is required. |
| </p></dd><dt><span class="term"><code class="literal">radiussecrets</code></span></dt><dd><p> |
| The shared secrets used when talking securely to the RADIUS |
| servers. This must have exactly the same value on the PostgreSQL |
| and RADIUS servers. It is recommended that this be a string of |
| at least 16 characters. This parameter is required. |
| </p><div class="note"><h3 class="title">Note</h3><p> |
| The encryption vector used will only be cryptographically |
| strong if <span class="productname">PostgreSQL</span> is built with support for |
| <span class="productname">OpenSSL</span>. In other cases, the transmission to the |
| RADIUS server should only be considered obfuscated, not secured, and |
| external security measures should be applied if necessary. |
| </p></div><p> |
| </p></dd><dt><span class="term"><code class="literal">radiusports</code></span></dt><dd><p> |
| The port numbers to connect to on the RADIUS servers. If no port |
| is specified, the default RADIUS port (<code class="literal">1812</code>) |
| will be used. |
| </p></dd><dt><span class="term"><code class="literal">radiusidentifiers</code></span></dt><dd><p> |
| The strings to be used as <code class="literal">NAS Identifier</code> in the |
| RADIUS requests. This parameter can be used, for example, to |
| identify which database cluster the user is attempting to connect |
| to, which can be useful for policy matching on |
| the RADIUS server. If no identifier is specified, the default |
| <code class="literal">postgresql</code> will be used. |
| </p></dd></dl></div><p> |
| </p><p> |
| If it is necessary to have a comma or whitespace in a RADIUS parameter |
| value, that can be done by putting double quotes around the value, but |
| it is tedious because two layers of double-quoting are now required. |
| An example of putting whitespace into RADIUS secret strings is: |
| </p><pre class="programlisting"> |
| host ... radius radiusservers="server1,server2" radiussecrets="""secret one"",""secret two""" |
| </pre><p> |
| </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="auth-ldap.html" title="21.10. LDAP 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-cert.html" title="21.12. Certificate Authentication">Next</a></td></tr><tr><td width="40%" align="left" valign="top">21.10. LDAP 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"> 21.12. Certificate Authentication</td></tr></table></div></body></html> |
