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<chapter id="libpq">

<title><application>libpq</application> - C Library</title>

<term><literal>sslmode</literal></term>

<listitem>

<para>

This option determines whether or with what priorityan

<acronym>SSL</> connection will be negotiated with the

This option determines whether or with what prioritya

<acronym>SSL</>TCP/IPconnection will be negotiated with the

server. There are four modes: <literal>disable</> will attempt

only an unencrypted <acronym>SSL</> connection;

<literal>allow</> will negotiate, trying first a

will negotiate, trying first an <acronym>SSL</> connection,

then if that fails, trying a regular non-<acronym>SSL</>

connection; <literal>require</> will try only an

<acronym>SSL</> connection.

<acronym>SSL</> connection. <literal>sslmode</> is ignored

for Unix domain socket communication.

</para>

<para>