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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>18.10. Secure TCP/IP Connections with GSSAPI Encryption</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 V1.79.1" /><link rel="prev" href="ssl-tcp.html" title="18.9. Secure TCP/IP Connections with SSL" /><link rel="next" href="ssh-tunnels.html" title="18.11. Secure TCP/IP Connections with SSH Tunnels" /></head><body><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">18.10. Secure TCP/IP Connections with GSSAPI Encryption</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="ssl-tcp.html" title="18.9. Secure TCP/IP Connections with SSL">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="runtime.html" title="Chapter 18. Server Setup and Operation">Up</a></td><th width="60%" align="center">Chapter 18. Server Setup and Operation</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 12.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="ssh-tunnels.html" title="18.11. Secure TCP/IP Connections with SSH Tunnels">Next</a></td></tr></table><hr></hr></div><div class="sect1" id="GSSAPI-ENC"><div class="titlepage"><div><div><h2 class="title" style="clear: both">18.10. Secure TCP/IP Connections with GSSAPI Encryption</h2></div></div></div><div class="toc"><dl class="toc"><dt><span class="sect2"><a href="gssapi-enc.html#GSSAPI-SETUP">18.10.1. Basic Setup</a></span></dt></dl></div><a id="id-1.6.5.12.2" class="indexterm"></a><p>
- <span class="productname">PostgreSQL</span> also has native support for
- using <acronym class="acronym">GSSAPI</acronym> to encrypt client/server communications for
- increased security. Support requires that a <acronym class="acronym">GSSAPI</acronym>
- implementation (such as MIT krb5) is installed on both client and server
- systems, and that support in <span class="productname">PostgreSQL</span> is
- enabled at build time (see <a class="xref" href="installation.html" title="Chapter 16. Installation from Source Code">Chapter 16</a>).
- </p><div class="sect2" id="GSSAPI-SETUP"><div class="titlepage"><div><div><h3 class="title">18.10.1. Basic Setup</h3></div></div></div><p>
- The <span class="productname">PostgreSQL</span> server will listen for both
- normal and <acronym class="acronym">GSSAPI</acronym>-encrypted connections on the same TCP
- port, and will negotiate with any connecting client on whether to
- use <acronym class="acronym">GSSAPI</acronym> for encryption (and for authentication). By
- default, this decision is up to the client (which means it can be
- downgraded by an attacker); see <a class="xref" href="auth-pg-hba-conf.html" title="20.1. The pg_hba.conf File">Section 20.1</a> about
- setting up the server to require the use of <acronym class="acronym">GSSAPI</acronym> for
- some or all connections.
- </p><p>
- Other than configuration of the negotiation
- behavior, <acronym class="acronym">GSSAPI</acronym> encryption requires no setup beyond
- that which is necessary for GSSAPI authentication. (For more information
- on configuring that, see <a class="xref" href="gssapi-auth.html" title="20.6. GSSAPI Authentication">Section 20.6</a>.)
- </p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ssl-tcp.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="runtime.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ssh-tunnels.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">18.9. Secure TCP/IP Connections with SSL </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> 18.11. Secure TCP/IP Connections with <span class="application">SSH</span> Tunnels</td></tr></table></div></body></html>
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