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<?xml version="1.0" encoding="utf-8"?>
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<section id="Java-Broker-Concepts-Authentication-Providers">
<title>Authentication Providers</title>
<para>
<emphasis>Authentication Providers</emphasis> are used to authenticate connections to <emphasis>Ports</emphasis>.
Many <emphasis>Authentication Providers</emphasis> can be configured on the Broker at the same time, from which
each <emphasis>Port</emphasis> can be assigned one.
</para>
<para>
The following authentication providers are supported:
<itemizedlist>
<listitem><para><link linkend= "Java-Broker-Security-Anonymous-Provider">Anonymous</link>:
allows anonymous connections to the broker</para></listitem>
<listitem><para><link linkend= "Java-Broker-Security-External-Provider">External</link>:
delegates to external mechanisms such as SSL Client Certificate Authentication</para></listitem>
<listitem><para><link linkend= "Java-Broker-Security-Kerberos-Provider">Kerberos</link>:
uses Kerberos to authenticate connections via GSS-API.</para></listitem>
<listitem><para><link linkend= "Java-Broker-Security-LDAP-Provider">SimpleLDAP</link>:
authenticate users against an LDAP server.</para></listitem>
<listitem><para><link linkend= "Java-Broker-Security-PlainPasswordFile-Provider">PlainPasswordFile</link>:
authenticate users against credentials stored in plain text in a local file.</para></listitem>
<listitem><para><link linkend= "Java-Broker-Security-Base64MD5PasswordFile-Provider">Base64MD5PasswordFile</link>:
authenticate users against credentials stored encoded in a local file.</para></listitem>
</itemizedlist>
</para>
<para>
The Password File based providers can perform explicit management (adding, removing, changing passwords)
of users via the Brokers management interfaces. The other providers offer no ability to manage users as they either have no scope
for user management (e.g Anonymous) or delegate this task to other systems (e.g LDAP).
</para>
<para>The configuration details for Authentication Providers are covered in <xref linkend= "Java-Broker-Security-Authentication-Providers"/>.</para>
</section>
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