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@ -156,69 +156,70 @@ BLOCKQUOTE.figure DIV.center DIV.center HR{display:none;}
</LI><LI CLASS="li-toc"><A HREF="#htoc54">3.3.16&#XA0;&#XA0;<TT>mod_proxy65</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc55">3.3.17&#XA0;&#XA0;<TT>mod_pubsub</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc56">3.3.18&#XA0;&#XA0;<TT>mod_register</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc57">3.3.19&#XA0;&#XA0;<TT>mod_roster</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc58">3.3.20&#XA0;&#XA0;<TT>mod_service_log</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc59">3.3.21&#XA0;&#XA0;<TT>mod_shared_roster</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc60">3.3.22&#XA0;&#XA0;<TT>mod_sic</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc61">3.3.23&#XA0;&#XA0;<TT>mod_stats</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc62">3.3.24&#XA0;&#XA0;<TT>mod_time</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc63">3.3.25&#XA0;&#XA0;<TT>mod_vcard</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc64">3.3.26&#XA0;&#XA0;<TT>mod_vcard_ldap</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc65">3.3.27&#XA0;&#XA0;<TT>mod_vcard_xupdate</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc66">3.3.28&#XA0;&#XA0;<TT>mod_version</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc57">3.3.19&#XA0;&#XA0;<TT>mod_register_web</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc58">3.3.20&#XA0;&#XA0;<TT>mod_roster</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc59">3.3.21&#XA0;&#XA0;<TT>mod_service_log</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc60">3.3.22&#XA0;&#XA0;<TT>mod_shared_roster</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc61">3.3.23&#XA0;&#XA0;<TT>mod_sic</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc62">3.3.24&#XA0;&#XA0;<TT>mod_stats</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc63">3.3.25&#XA0;&#XA0;<TT>mod_time</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc64">3.3.26&#XA0;&#XA0;<TT>mod_vcard</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc65">3.3.27&#XA0;&#XA0;<TT>mod_vcard_ldap</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc66">3.3.28&#XA0;&#XA0;<TT>mod_vcard_xupdate</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc67">3.3.29&#XA0;&#XA0;<TT>mod_version</TT></A>
</LI></UL>
</LI></UL>
</LI><LI CLASS="li-toc"><A HREF="#htoc67">Chapter&#XA0;4&#XA0;&#XA0;Managing an <TT>ejabberd</TT> Server</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc68">Chapter&#XA0;4&#XA0;&#XA0;Managing an <TT>ejabberd</TT> Server</A>
<UL CLASS="toc"><LI CLASS="li-toc">
<A HREF="#htoc68">4.1&#XA0;&#XA0;<TT>ejabberdctl</TT></A>
<A HREF="#htoc69">4.1&#XA0;&#XA0;<TT>ejabberdctl</TT></A>
<UL CLASS="toc"><LI CLASS="li-toc">
<A HREF="#htoc69">4.1.1&#XA0;&#XA0;ejabberdctl Commands</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc70">4.1.2&#XA0;&#XA0;Erlang Runtime System</A>
<A HREF="#htoc70">4.1.1&#XA0;&#XA0;ejabberdctl Commands</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc71">4.1.2&#XA0;&#XA0;Erlang Runtime System</A>
</LI></UL>
</LI><LI CLASS="li-toc"><A HREF="#htoc71">4.2&#XA0;&#XA0;<TT>ejabberd</TT> Commands</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc72">4.2&#XA0;&#XA0;<TT>ejabberd</TT> Commands</A>
<UL CLASS="toc"><LI CLASS="li-toc">
<A HREF="#htoc72">4.2.1&#XA0;&#XA0;List of ejabberd Commands</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc73">4.2.2&#XA0;&#XA0;Restrict Execution with AccessCommands</A>
<A HREF="#htoc73">4.2.1&#XA0;&#XA0;List of ejabberd Commands</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc74">4.2.2&#XA0;&#XA0;Restrict Execution with AccessCommands</A>
</LI></UL>
</LI><LI CLASS="li-toc"><A HREF="#htoc74">4.3&#XA0;&#XA0;Web Admin</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc75">4.4&#XA0;&#XA0;Ad-hoc Commands</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc76">4.5&#XA0;&#XA0;Change Computer Hostname</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc75">4.3&#XA0;&#XA0;Web Admin</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc76">4.4&#XA0;&#XA0;Ad-hoc Commands</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc77">4.5&#XA0;&#XA0;Change Computer Hostname</A>
</LI></UL>
</LI><LI CLASS="li-toc"><A HREF="#htoc77">Chapter&#XA0;5&#XA0;&#XA0;Securing <TT>ejabberd</TT></A>
</LI><LI CLASS="li-toc"><A HREF="#htoc78">Chapter&#XA0;5&#XA0;&#XA0;Securing <TT>ejabberd</TT></A>
<UL CLASS="toc"><LI CLASS="li-toc">
<A HREF="#htoc78">5.1&#XA0;&#XA0;Firewall Settings</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc79">5.2&#XA0;&#XA0;epmd</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc80">5.3&#XA0;&#XA0;Erlang Cookie</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc81">5.4&#XA0;&#XA0;Erlang Node Name</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc82">5.5&#XA0;&#XA0;Securing Sensitive Files</A>
<A HREF="#htoc79">5.1&#XA0;&#XA0;Firewall Settings</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc80">5.2&#XA0;&#XA0;epmd</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc81">5.3&#XA0;&#XA0;Erlang Cookie</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc82">5.4&#XA0;&#XA0;Erlang Node Name</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc83">5.5&#XA0;&#XA0;Securing Sensitive Files</A>
</LI></UL>
</LI><LI CLASS="li-toc"><A HREF="#htoc83">Chapter&#XA0;6&#XA0;&#XA0;Clustering</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc84">Chapter&#XA0;6&#XA0;&#XA0;Clustering</A>
<UL CLASS="toc"><LI CLASS="li-toc">
<A HREF="#htoc84">6.1&#XA0;&#XA0;How it Works</A>
<A HREF="#htoc85">6.1&#XA0;&#XA0;How it Works</A>
<UL CLASS="toc"><LI CLASS="li-toc">
<A HREF="#htoc85">6.1.1&#XA0;&#XA0;Router</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc86">6.1.2&#XA0;&#XA0;Local Router</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc87">6.1.3&#XA0;&#XA0;Session Manager</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc88">6.1.4&#XA0;&#XA0;s2s Manager</A>
<A HREF="#htoc86">6.1.1&#XA0;&#XA0;Router</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc87">6.1.2&#XA0;&#XA0;Local Router</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc88">6.1.3&#XA0;&#XA0;Session Manager</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc89">6.1.4&#XA0;&#XA0;s2s Manager</A>
</LI></UL>
</LI><LI CLASS="li-toc"><A HREF="#htoc89">6.2&#XA0;&#XA0;Clustering Setup</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc90">6.3&#XA0;&#XA0;Service Load-Balancing</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc90">6.2&#XA0;&#XA0;Clustering Setup</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc91">6.3&#XA0;&#XA0;Service Load-Balancing</A>
<UL CLASS="toc"><LI CLASS="li-toc">
<A HREF="#htoc91">6.3.1&#XA0;&#XA0;Components Load-Balancing</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc92">6.3.2&#XA0;&#XA0;Domain Load-Balancing Algorithm</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc93">6.3.3&#XA0;&#XA0;Load-Balancing Buckets</A>
<A HREF="#htoc92">6.3.1&#XA0;&#XA0;Components Load-Balancing</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc93">6.3.2&#XA0;&#XA0;Domain Load-Balancing Algorithm</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc94">6.3.3&#XA0;&#XA0;Load-Balancing Buckets</A>
</LI></UL>
</LI></UL>
</LI><LI CLASS="li-toc"><A HREF="#htoc94">Chapter&#XA0;7&#XA0;&#XA0;Debugging</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc95">Chapter&#XA0;7&#XA0;&#XA0;Debugging</A>
<UL CLASS="toc"><LI CLASS="li-toc">
<A HREF="#htoc95">7.1&#XA0;&#XA0;Log Files</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc96">7.2&#XA0;&#XA0;Debug Console</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc97">7.3&#XA0;&#XA0;Watchdog Alerts</A>
<A HREF="#htoc96">7.1&#XA0;&#XA0;Log Files</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc97">7.2&#XA0;&#XA0;Debug Console</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc98">7.3&#XA0;&#XA0;Watchdog Alerts</A>
</LI></UL>
</LI><LI CLASS="li-toc"><A HREF="#htoc98">Appendix&#XA0;A&#XA0;&#XA0;Internationalization and Localization</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc99">Appendix&#XA0;B&#XA0;&#XA0;Release Notes</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc100">Appendix&#XA0;C&#XA0;&#XA0;Acknowledgements</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc101">Appendix&#XA0;D&#XA0;&#XA0;Copyright Information</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc99">Appendix&#XA0;A&#XA0;&#XA0;Internationalization and Localization</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc100">Appendix&#XA0;B&#XA0;&#XA0;Release Notes</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc101">Appendix&#XA0;C&#XA0;&#XA0;Acknowledgements</A>
</LI><LI CLASS="li-toc"><A HREF="#htoc102">Appendix&#XA0;D&#XA0;&#XA0;Copyright Information</A>
</LI></UL><!--TOC chapter Introduction-->
<H1 CLASS="chapter"><!--SEC ANCHOR --><A NAME="htoc1">Chapter&#XA0;1</A>&#XA0;&#XA0;Introduction</H1><!--SEC END --><P>
<A NAME="intro"></A></P><P><TT>ejabberd</TT> is a free and open source instant messaging server written in <A HREF="http://www.erlang.org/">Erlang/OTP</A>.</P><P><TT>ejabberd</TT> is cross-platform, distributed, fault-tolerant, and based on open standards to achieve real-time communication.</P><P><TT>ejabberd</TT> is designed to be a rock-solid and feature rich XMPP server.</P><P><TT>ejabberd</TT> is suitable for small deployments, whether they need to be scalable or not, as well as extremely big deployments.</P><!--TOC section Key Features-->
@ -1921,6 +1922,7 @@ all entries end with a comma:
<TR><TD ALIGN=left NOWRAP><A HREF="#modpubsub"><TT>mod_pubsub</TT></A></TD><TD ALIGN=left NOWRAP>Pub-Sub (<A HREF="http://xmpp.org/extensions/xep-0060.html">XEP-0060</A>), PEP (<A HREF="http://xmpp.org/extensions/xep-0163.html">XEP-0163</A>)</TD><TD ALIGN=left NOWRAP><TT>mod_caps</TT></TD></TR>
<TR><TD ALIGN=left NOWRAP><A HREF="#modpubsub"><TT>mod_pubsub_odbc</TT></A></TD><TD ALIGN=left NOWRAP>Pub-Sub (<A HREF="http://xmpp.org/extensions/xep-0060.html">XEP-0060</A>), PEP (<A HREF="http://xmpp.org/extensions/xep-0163.html">XEP-0163</A>)</TD><TD ALIGN=left NOWRAP>supported DB (*) and <TT>mod_caps</TT></TD></TR>
<TR><TD ALIGN=left NOWRAP><A HREF="#modregister"><TT>mod_register</TT></A></TD><TD ALIGN=left NOWRAP>In-Band Registration (<A HREF="http://xmpp.org/extensions/xep-0077.html">XEP-0077</A>)</TD><TD ALIGN=left NOWRAP>&nbsp;</TD></TR>
<TR><TD ALIGN=left NOWRAP><A HREF="#modregisterweb"><TT>mod_register_web</TT></A></TD><TD ALIGN=left NOWRAP>Web for Account Registrations</TD><TD ALIGN=left NOWRAP>&nbsp;</TD></TR>
<TR><TD ALIGN=left NOWRAP><A HREF="#modroster"><TT>mod_roster</TT></A></TD><TD ALIGN=left NOWRAP>Roster management (XMPP IM)</TD><TD ALIGN=left NOWRAP>&nbsp;</TD></TR>
<TR><TD ALIGN=left NOWRAP><A HREF="#modroster"><TT>mod_roster_odbc</TT></A></TD><TD ALIGN=left NOWRAP>Roster management (XMPP IM)</TD><TD ALIGN=left NOWRAP>supported DB (*)</TD></TR>
<TR><TD ALIGN=left NOWRAP><A HREF="#modservicelog"><TT>mod_service_log</TT></A></TD><TD ALIGN=left NOWRAP>Copy user messages to logger service</TD><TD ALIGN=left NOWRAP>&nbsp;</TD></TR>
@ -3043,8 +3045,39 @@ Also define a registration timeout of one hour:
]},
...
]}.
</PRE></LI></UL><P> <A NAME="modroster"></A> </P><!--TOC subsection <TT>mod_roster</TT>-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc57">3.3.19</A>&#XA0;&#XA0;<A HREF="#modroster"><TT>mod_roster</TT></A></H3><!--SEC END --><P> <A NAME="modroster"></A>
</PRE></LI></UL><P> <A NAME="modregisterweb"></A> </P><!--TOC subsection <TT>mod_register_web</TT>-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc57">3.3.19</A>&#XA0;&#XA0;<A HREF="#modregisterweb"><TT>mod_register_web</TT></A></H3><!--SEC END --><P> <A NAME="modregisterweb"></A>
</P><P>This module provides a web page where people can:
</P><UL CLASS="itemize"><LI CLASS="li-itemize">
Register a new account on the server.
</LI><LI CLASS="li-itemize">Change the password from an existing account on the server.
</LI><LI CLASS="li-itemize">Delete an existing account on the server.
</LI></UL><P>This module supports CAPTCHA image to register a new account.
To enable this feature, configure the options captcha_cmd and captcha_host.</P><P>Options:
</P><DL CLASS="description"><DT CLASS="dt-description">
<B><TT>{registration_watchers, [ JID, ...]}</TT></B></DT><DD CLASS="dd-description"> This option defines a
list of JIDs which will be notified each time a new account is registered.
</DD></DL><P>This example configuration shows how to enable the module and the web handler:
</P><PRE CLASS="verbatim">{listen, [
...
{5281, ejabberd_http, [
tls,
{certfile, "/etc/ejabberd/certificate.pem"},
register
]},
...
]}.
{modules,
[
...
{mod_register_web, []},
...
]}.
</PRE><P>The users can visit this page: https://localhost:5281/register/
It is important to include the last / character in the URL,
otherwise the subpages URL will be incorrect.</P><P> <A NAME="modroster"></A> </P><!--TOC subsection <TT>mod_roster</TT>-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc58">3.3.20</A>&#XA0;&#XA0;<A HREF="#modroster"><TT>mod_roster</TT></A></H3><!--SEC END --><P> <A NAME="modroster"></A>
</P><P>This module implements roster management as defined in
<A HREF="http://xmpp.org/rfcs/rfc3921.html#roster">RFC 3921: XMPP IM</A>.
It also supports Roster Versioning (<A HREF="http://xmpp.org/extensions/xep-0237.html">XEP-0237</A>).</P><P>Options:
@ -3070,7 +3103,7 @@ Important: if you use <TT>mod_shared_roster</TT>, you must disable this option.
...
]}.
</PRE><P> <A NAME="modservicelog"></A> </P><!--TOC subsection <TT>mod_service_log</TT>-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc58">3.3.20</A>&#XA0;&#XA0;<A HREF="#modservicelog"><TT>mod_service_log</TT></A></H3><!--SEC END --><P> <A NAME="modservicelog"></A>
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc59">3.3.21</A>&#XA0;&#XA0;<A HREF="#modservicelog"><TT>mod_service_log</TT></A></H3><!--SEC END --><P> <A NAME="modservicelog"></A>
</P><P>This module adds support for logging end user packets via a XMPP message
auditing service such as
<A HREF="http://www.funkypenguin.info/project/bandersnatch/">Bandersnatch</A>. All user
@ -3100,7 +3133,7 @@ To log all end user packets to the Bandersnatch service running on
...
]}.
</PRE></LI></UL><P> <A NAME="modsharedroster"></A> </P><!--TOC subsection <TT>mod_shared_roster</TT>-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc59">3.3.21</A>&#XA0;&#XA0;<A HREF="#modsharedroster"><TT>mod_shared_roster</TT></A></H3><!--SEC END --><P> <A NAME="modsharedroster"></A>
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc60">3.3.22</A>&#XA0;&#XA0;<A HREF="#modsharedroster"><TT>mod_shared_roster</TT></A></H3><!--SEC END --><P> <A NAME="modsharedroster"></A>
</P><P>This module enables you to create shared roster groups. This means that you can
create groups of people that can see members from (other) groups in their
rosters. The big advantages of this feature are that end users do not need to
@ -3175,14 +3208,14 @@ roster groups as shown in the following table:
</TABLE>
<DIV CLASS="center"><HR WIDTH="80%" SIZE=2></DIV></DIV></BLOCKQUOTE>
</LI></UL><P> <A NAME="modsic"></A> </P><!--TOC subsection <TT>mod_sic</TT>-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc60">3.3.22</A>&#XA0;&#XA0;<A HREF="#modsic"><TT>mod_sic</TT></A></H3><!--SEC END --><P> <A NAME="modsic"></A>
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc61">3.3.23</A>&#XA0;&#XA0;<A HREF="#modsic"><TT>mod_sic</TT></A></H3><!--SEC END --><P> <A NAME="modsic"></A>
</P><P>This module adds support for Server IP Check (<A HREF="http://xmpp.org/extensions/xep-0279.html">XEP-0279</A>). This protocol
enables a client to discover its external IP address.</P><P>Options:
</P><DL CLASS="description"><DT CLASS="dt-description">
<B><TT>{iqdisc, Discipline}</TT></B></DT><DD CLASS="dd-description"> This specifies
the processing discipline for <TT>urn:xmpp:sic:0</TT> IQ queries (see section&#XA0;<A HREF="#modiqdiscoption">3.3.2</A>).
</DD></DL><P> <A NAME="modstats"></A> </P><!--TOC subsection <TT>mod_stats</TT>-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc61">3.3.23</A>&#XA0;&#XA0;<A HREF="#modstats"><TT>mod_stats</TT></A></H3><!--SEC END --><P> <A NAME="modstats"></A>
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc62">3.3.24</A>&#XA0;&#XA0;<A HREF="#modstats"><TT>mod_stats</TT></A></H3><!--SEC END --><P> <A NAME="modstats"></A>
</P><P>This module adds support for Statistics Gathering (<A HREF="http://xmpp.org/extensions/xep-0039.html">XEP-0039</A>). This protocol
allows you to retrieve next statistics from your <TT>ejabberd</TT> deployment:
</P><UL CLASS="itemize"><LI CLASS="li-itemize">
@ -3214,14 +3247,14 @@ by sending:
&lt;/query&gt;
&lt;/iq&gt;
</PRE></LI></UL><P> <A NAME="modtime"></A> </P><!--TOC subsection <TT>mod_time</TT>-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc62">3.3.24</A>&#XA0;&#XA0;<A HREF="#modtime"><TT>mod_time</TT></A></H3><!--SEC END --><P> <A NAME="modtime"></A>
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc63">3.3.25</A>&#XA0;&#XA0;<A HREF="#modtime"><TT>mod_time</TT></A></H3><!--SEC END --><P> <A NAME="modtime"></A>
</P><P>This module features support for Entity Time (<A HREF="http://xmpp.org/extensions/xep-0202.html">XEP-0202</A>). By using this XEP,
you are able to discover the time at another entity&#X2019;s location.</P><P>Options:
</P><DL CLASS="description"><DT CLASS="dt-description">
<B><TT>{iqdisc, Discipline}</TT></B></DT><DD CLASS="dd-description"> This specifies
the processing discipline for Entity Time (<TT>jabber:iq:time</TT>) IQ queries (see section&#XA0;<A HREF="#modiqdiscoption">3.3.2</A>).
</DD></DL><P> <A NAME="modvcard"></A> </P><!--TOC subsection <TT>mod_vcard</TT>-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc63">3.3.25</A>&#XA0;&#XA0;<A HREF="#modvcard"><TT>mod_vcard</TT></A></H3><!--SEC END --><P> <A NAME="modvcard"></A>
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc64">3.3.26</A>&#XA0;&#XA0;<A HREF="#modvcard"><TT>mod_vcard</TT></A></H3><!--SEC END --><P> <A NAME="modvcard"></A>
</P><P>This module allows end users to store and retrieve their vCard, and to retrieve
other users vCards, as defined in vcard-temp (<A HREF="http://xmpp.org/extensions/xep-0054.html">XEP-0054</A>). The module also
implements an uncomplicated Jabber User Directory based on the vCards of
@ -3276,7 +3309,7 @@ and that all virtual hosts will be searched instead of only the current one:
...
]}.
</PRE></LI></UL><P> <A NAME="modvcardldap"></A> </P><!--TOC subsection <TT>mod_vcard_ldap</TT>-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc64">3.3.26</A>&#XA0;&#XA0;<A HREF="#modvcardldap"><TT>mod_vcard_ldap</TT></A></H3><!--SEC END --><P> <A NAME="modvcardldap"></A>
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc65">3.3.27</A>&#XA0;&#XA0;<A HREF="#modvcardldap"><TT>mod_vcard_ldap</TT></A></H3><!--SEC END --><P> <A NAME="modvcardldap"></A>
</P><P><TT>ejabberd</TT> can map LDAP attributes to vCard fields. This behaviour is
implemented in the <TT>mod_vcard_ldap</TT> module. This module does not depend on the
authentication method (see&#XA0;<A HREF="#ldapauth">3.2.5</A>).</P><P>Usually <TT>ejabberd</TT> treats LDAP as a read-only storage:
@ -3458,7 +3491,7 @@ searching his info in LDAP.</P></LI><LI CLASS="li-itemize"><TT>ldap_vcard_map</T
{"Nickname", "NICKNAME"}
]},
</PRE></LI></UL><P> <A NAME="modvcardxupdate"></A> </P><!--TOC subsection <TT>mod_vcard_xupdate</TT>-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc65">3.3.27</A>&#XA0;&#XA0;<A HREF="#modvcardxupdate"><TT>mod_vcard_xupdate</TT></A></H3><!--SEC END --><P> <A NAME="modvcardxupdate"></A>
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc66">3.3.28</A>&#XA0;&#XA0;<A HREF="#modvcardxupdate"><TT>mod_vcard_xupdate</TT></A></H3><!--SEC END --><P> <A NAME="modvcardxupdate"></A>
</P><P>The user&#X2019;s client can store an avatar in the user vCard.
The vCard-Based Avatars protocol (<A HREF="http://xmpp.org/extensions/xep-0153.html">XEP-0153</A>)
provides a method for clients to inform the contacts what is the avatar hash value.
@ -3472,7 +3505,7 @@ and each presence sent by a client produces hash retrieval and a
presence stanza rewrite.
For this reason, enabling this module will introduce a computational overhead
in servers with clients that change frequently their presence.</P><P> <A NAME="modversion"></A> </P><!--TOC subsection <TT>mod_version</TT>-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc66">3.3.28</A>&#XA0;&#XA0;<A HREF="#modversion"><TT>mod_version</TT></A></H3><!--SEC END --><P> <A NAME="modversion"></A>
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc67">3.3.29</A>&#XA0;&#XA0;<A HREF="#modversion"><TT>mod_version</TT></A></H3><!--SEC END --><P> <A NAME="modversion"></A>
</P><P>This module implements Software Version (<A HREF="http://xmpp.org/extensions/xep-0092.html">XEP-0092</A>). Consequently, it
answers <TT>ejabberd</TT>&#X2019;s version when queried.</P><P>Options:
</P><DL CLASS="description"><DT CLASS="dt-description">
@ -3481,8 +3514,8 @@ The default value is <TT>true</TT>.
</DD><DT CLASS="dt-description"><B><TT>{iqdisc, Discipline}</TT></B></DT><DD CLASS="dd-description"> This specifies
the processing discipline for Software Version (<TT>jabber:iq:version</TT>) IQ queries (see section&#XA0;<A HREF="#modiqdiscoption">3.3.2</A>).
</DD></DL><P> <A NAME="manage"></A> </P><!--TOC chapter Managing an <TT>ejabberd</TT> Server-->
<H1 CLASS="chapter"><!--SEC ANCHOR --><A NAME="htoc67">Chapter&#XA0;4</A>&#XA0;&#XA0;<A HREF="#manage">Managing an <TT>ejabberd</TT> Server</A></H1><!--SEC END --><P> <A NAME="manage"></A> </P><P> <A NAME="ejabberdctl"></A> </P><!--TOC section <TT>ejabberdctl</TT>-->
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc68">4.1</A>&#XA0;&#XA0;<A HREF="#ejabberdctl"><TT>ejabberdctl</TT></A></H2><!--SEC END --><P> <A NAME="ejabberdctl"></A> </P><P>With the <TT>ejabberdctl</TT> command line administration script
<H1 CLASS="chapter"><!--SEC ANCHOR --><A NAME="htoc68">Chapter&#XA0;4</A>&#XA0;&#XA0;<A HREF="#manage">Managing an <TT>ejabberd</TT> Server</A></H1><!--SEC END --><P> <A NAME="manage"></A> </P><P> <A NAME="ejabberdctl"></A> </P><!--TOC section <TT>ejabberdctl</TT>-->
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc69">4.1</A>&#XA0;&#XA0;<A HREF="#ejabberdctl"><TT>ejabberdctl</TT></A></H2><!--SEC END --><P> <A NAME="ejabberdctl"></A> </P><P>With the <TT>ejabberdctl</TT> command line administration script
you can execute <TT>ejabberdctl commands</TT> (described in the next section, <A HREF="#ectl-commands">4.1.1</A>)
and also many general <TT>ejabberd commands</TT> (described in section <A HREF="#eja-commands">4.2</A>).
This means you can start, stop and perform many other administrative tasks
@ -3494,7 +3527,7 @@ and other codes may be used for specific results.
This can be used by other scripts to determine automatically
if a command succeeded or failed,
for example using: <TT>echo $?</TT></P><P> <A NAME="ectl-commands"></A> </P><!--TOC subsection ejabberdctl Commands-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc69">4.1.1</A>&#XA0;&#XA0;<A HREF="#ectl-commands">ejabberdctl Commands</A></H3><!--SEC END --><P> <A NAME="ectl-commands"></A> </P><P>When <TT>ejabberdctl</TT> is executed without any parameter,
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc70">4.1.1</A>&#XA0;&#XA0;<A HREF="#ectl-commands">ejabberdctl Commands</A></H3><!--SEC END --><P> <A NAME="ectl-commands"></A> </P><P>When <TT>ejabberdctl</TT> is executed without any parameter,
it displays the available options. If there isn&#X2019;t an <TT>ejabberd</TT> server running,
the available parameters are:
</P><DL CLASS="description"><DT CLASS="dt-description">
@ -3530,7 +3563,7 @@ robot1
testuser1
testuser2
</PRE><P> <A NAME="erlangconfiguration"></A> </P><!--TOC subsection Erlang Runtime System-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc70">4.1.2</A>&#XA0;&#XA0;<A HREF="#erlangconfiguration">Erlang Runtime System</A></H3><!--SEC END --><P> <A NAME="erlangconfiguration"></A> </P><P><TT>ejabberd</TT> is an Erlang/OTP application that runs inside an Erlang runtime system.
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc71">4.1.2</A>&#XA0;&#XA0;<A HREF="#erlangconfiguration">Erlang Runtime System</A></H3><!--SEC END --><P> <A NAME="erlangconfiguration"></A> </P><P><TT>ejabberd</TT> is an Erlang/OTP application that runs inside an Erlang runtime system.
This system is configured using environment variables and command line parameters.
The <TT>ejabberdctl</TT> administration script uses many of those possibilities.
You can configure some of them with the file <TT>ejabberdctl.cfg</TT>,
@ -3607,7 +3640,7 @@ not &#X201C;Simple Authentication and Security Layer&#X201D;.
</DD></DL><P>
Note that some characters need to be escaped when used in shell scripts, for instance <CODE>"</CODE> and <CODE>{}</CODE>.
You can find other options in the Erlang manual page (<TT>erl -man erl</TT>).</P><P> <A NAME="eja-commands"></A> </P><!--TOC section <TT>ejabberd</TT> Commands-->
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc71">4.2</A>&#XA0;&#XA0;<A HREF="#eja-commands"><TT>ejabberd</TT> Commands</A></H2><!--SEC END --><P> <A NAME="eja-commands"></A> </P><P>An <TT>ejabberd command</TT> is an abstract function identified by a name,
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc72">4.2</A>&#XA0;&#XA0;<A HREF="#eja-commands"><TT>ejabberd</TT> Commands</A></H2><!--SEC END --><P> <A NAME="eja-commands"></A> </P><P>An <TT>ejabberd command</TT> is an abstract function identified by a name,
with a defined number and type of calling arguments and type of result
that is registered in the <TT>ejabberd_commands</TT> service.
Those commands can be defined in any Erlang module and executed using any valid frontend.</P><P><TT>ejabberd</TT> includes a frontend to execute <TT>ejabberd commands</TT>: the script <TT>ejabberdctl</TT>.
@ -3615,7 +3648,7 @@ Other known frontends that can be installed to execute ejabberd commands in diff
<TT>ejabberd_xmlrpc</TT> (XML-RPC service),
<TT>mod_rest</TT> (HTTP POST service),
<TT>mod_shcommands</TT> (ejabberd WebAdmin page).</P><P> <A NAME="list-eja-commands"></A> </P><!--TOC subsection List of ejabberd Commands-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc72">4.2.1</A>&#XA0;&#XA0;<A HREF="#list-eja-commands">List of ejabberd Commands</A></H3><!--SEC END --><P> <A NAME="list-eja-commands"></A> </P><P><TT>ejabberd</TT> includes a few ejabberd Commands by default.
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc73">4.2.1</A>&#XA0;&#XA0;<A HREF="#list-eja-commands">List of ejabberd Commands</A></H3><!--SEC END --><P> <A NAME="list-eja-commands"></A> </P><P><TT>ejabberd</TT> includes a few ejabberd Commands by default.
When more modules are installed, new commands may be available in the frontends.</P><P>The easiest way to get a list of the available commands, and get help for them is to use
the ejabberdctl script:
</P><PRE CLASS="verbatim">$ ejabberdctl help
@ -3667,7 +3700,7 @@ is very high.
</DD><DT CLASS="dt-description"><B><TT>register user host password</TT></B></DT><DD CLASS="dd-description"> Register an account in that domain with the given password.
</DD><DT CLASS="dt-description"><B><TT>unregister user host</TT></B></DT><DD CLASS="dd-description"> Unregister the given account.
</DD></DL><P> <A NAME="accesscommands"></A> </P><!--TOC subsection Restrict Execution with AccessCommands-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc73">4.2.2</A>&#XA0;&#XA0;<A HREF="#accesscommands">Restrict Execution with AccessCommands</A></H3><!--SEC END --><P> <A NAME="accesscommands"></A> </P><P>The frontends can be configured to restrict access to certain commands.
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc74">4.2.2</A>&#XA0;&#XA0;<A HREF="#accesscommands">Restrict Execution with AccessCommands</A></H3><!--SEC END --><P> <A NAME="accesscommands"></A> </P><P>The frontends can be configured to restrict access to certain commands.
In that case, authentication information must be provided.
In each frontend the <TT>AccessCommands</TT> option is defined
in a different place. But in all cases the option syntax is the same:
@ -3712,7 +3745,7 @@ and the provided arguments do not contradict Arguments.</P><P>As an example to u
{_bot_reg_test, [register, unregister], [{host, "test.org"}]}
]
</PRE><P> <A NAME="webadmin"></A> </P><!--TOC section Web Admin-->
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc74">4.3</A>&#XA0;&#XA0;<A HREF="#webadmin">Web Admin</A></H2><!--SEC END --><P> <A NAME="webadmin"></A>
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc75">4.3</A>&#XA0;&#XA0;<A HREF="#webadmin">Web Admin</A></H2><!--SEC END --><P> <A NAME="webadmin"></A>
</P><P>The <TT>ejabberd</TT> Web Admin allows to administer most of <TT>ejabberd</TT> using a web browser.</P><P>This feature is enabled by default:
a <TT>ejabberd_http</TT> listener with the option <TT>web_admin</TT> (see
section&#XA0;<A HREF="#listened">3.1.3</A>) is included in the listening ports. Then you can open
@ -3789,13 +3822,13 @@ The file is searched by default in
The directory of the documentation can be specified in
the environment variable <TT>EJABBERD_DOC_PATH</TT>.
See section <A HREF="#erlangconfiguration">4.1.2</A>.</P><P> <A NAME="adhoccommands"></A> </P><!--TOC section Ad-hoc Commands-->
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc75">4.4</A>&#XA0;&#XA0;<A HREF="#adhoccommands">Ad-hoc Commands</A></H2><!--SEC END --><P> <A NAME="adhoccommands"></A> </P><P>If you enable <TT>mod_configure</TT> and <TT>mod_adhoc</TT>,
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc76">4.4</A>&#XA0;&#XA0;<A HREF="#adhoccommands">Ad-hoc Commands</A></H2><!--SEC END --><P> <A NAME="adhoccommands"></A> </P><P>If you enable <TT>mod_configure</TT> and <TT>mod_adhoc</TT>,
you can perform several administrative tasks in <TT>ejabberd</TT>
with a XMPP client.
The client must support Ad-Hoc Commands (<A HREF="http://xmpp.org/extensions/xep-0050.html">XEP-0050</A>),
and you must login in the XMPP server with
an account with proper privileges.</P><P> <A NAME="changeerlangnodename"></A> </P><!--TOC section Change Computer Hostname-->
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc76">4.5</A>&#XA0;&#XA0;<A HREF="#changeerlangnodename">Change Computer Hostname</A></H2><!--SEC END --><P> <A NAME="changeerlangnodename"></A> </P><P><TT>ejabberd</TT> uses the distributed Mnesia database.
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc77">4.5</A>&#XA0;&#XA0;<A HREF="#changeerlangnodename">Change Computer Hostname</A></H2><!--SEC END --><P> <A NAME="changeerlangnodename"></A> </P><P><TT>ejabberd</TT> uses the distributed Mnesia database.
Being distributed, Mnesia enforces consistency of its file,
so it stores the name of the Erlang node in it (see section <A HREF="#nodename">5.4</A>).
The name of an Erlang node includes the hostname of the computer.
@ -3841,8 +3874,8 @@ mv /var/lib/ejabberd/*.* /var/lib/ejabberd/oldfiles/
</PRE></LI><LI CLASS="li-enumerate">Check that the information of the old database is available: accounts, rosters...
After you finish, remember to delete the temporary backup files from public directories.
</LI></OL><P> <A NAME="secure"></A> </P><!--TOC chapter Securing <TT>ejabberd</TT>-->
<H1 CLASS="chapter"><!--SEC ANCHOR --><A NAME="htoc77">Chapter&#XA0;5</A>&#XA0;&#XA0;<A HREF="#secure">Securing <TT>ejabberd</TT></A></H1><!--SEC END --><P> <A NAME="secure"></A> </P><P> <A NAME="firewall"></A> </P><!--TOC section Firewall Settings-->
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc78">5.1</A>&#XA0;&#XA0;<A HREF="#firewall">Firewall Settings</A></H2><!--SEC END --><P> <A NAME="firewall"></A>
<H1 CLASS="chapter"><!--SEC ANCHOR --><A NAME="htoc78">Chapter&#XA0;5</A>&#XA0;&#XA0;<A HREF="#secure">Securing <TT>ejabberd</TT></A></H1><!--SEC END --><P> <A NAME="secure"></A> </P><P> <A NAME="firewall"></A> </P><!--TOC section Firewall Settings-->
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc79">5.1</A>&#XA0;&#XA0;<A HREF="#firewall">Firewall Settings</A></H2><!--SEC END --><P> <A NAME="firewall"></A>
</P><P>You need to take the following TCP ports in mind when configuring your firewall:
</P><BLOCKQUOTE CLASS="table"><DIV CLASS="center"><DIV CLASS="center"><HR WIDTH="80%" SIZE=2></DIV>
<TABLE BORDER=1 CELLSPACING=0 CELLPADDING=1><TR><TD ALIGN=left NOWRAP><B>Port</B></TD><TD ALIGN=left NOWRAP><B>Description</B></TD></TR>
@ -3853,7 +3886,7 @@ After you finish, remember to delete the temporary backup files from public dire
<TR><TD ALIGN=left NOWRAP>port range</TD><TD ALIGN=left NOWRAP>Used for connections between Erlang nodes. This range is configurable (see section <A HREF="#epmd">5.2</A>).</TD></TR>
</TABLE>
<DIV CLASS="center"><HR WIDTH="80%" SIZE=2></DIV></DIV></BLOCKQUOTE><P> <A NAME="epmd"></A> </P><!--TOC section epmd-->
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc79">5.2</A>&#XA0;&#XA0;<A HREF="#epmd">epmd</A></H2><!--SEC END --><P> <A NAME="epmd"></A> </P><P><A HREF="http://www.erlang.org/doc/man/epmd.html">epmd (Erlang Port Mapper Daemon)</A>
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc80">5.2</A>&#XA0;&#XA0;<A HREF="#epmd">epmd</A></H2><!--SEC END --><P> <A NAME="epmd"></A> </P><P><A HREF="http://www.erlang.org/doc/man/epmd.html">epmd (Erlang Port Mapper Daemon)</A>
is a small name server included in Erlang/OTP
and used by Erlang programs when establishing distributed Erlang communications.
<TT>ejabberd</TT> needs <TT>epmd</TT> to use <TT>ejabberdctl</TT> and also when clustering <TT>ejabberd</TT> nodes.
@ -3878,7 +3911,7 @@ but can be configured in the file <TT>ejabberdctl.cfg</TT>.
The Erlang command-line parameter used internally is, for example:
</P><PRE CLASS="verbatim">erl ... -kernel inet_dist_listen_min 4370 inet_dist_listen_max 4375
</PRE><P> <A NAME="cookie"></A> </P><!--TOC section Erlang Cookie-->
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc80">5.3</A>&#XA0;&#XA0;<A HREF="#cookie">Erlang Cookie</A></H2><!--SEC END --><P> <A NAME="cookie"></A> </P><P>The Erlang cookie is a string with numbers and letters.
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc81">5.3</A>&#XA0;&#XA0;<A HREF="#cookie">Erlang Cookie</A></H2><!--SEC END --><P> <A NAME="cookie"></A> </P><P>The Erlang cookie is a string with numbers and letters.
An Erlang node reads the cookie at startup from the command-line parameter <TT>-setcookie</TT>.
If not indicated, the cookie is read from the cookie file <TT>$HOME/.erlang.cookie</TT>.
If this file does not exist, it is created immediately with a random cookie.
@ -3892,7 +3925,7 @@ to prevent unauthorized access or intrusion to an Erlang node.
The communication between Erlang nodes are not encrypted,
so the cookie could be read sniffing the traffic on the network.
The recommended way to secure the Erlang node is to block the port 4369.</P><P> <A NAME="nodename"></A> </P><!--TOC section Erlang Node Name-->
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc81">5.4</A>&#XA0;&#XA0;<A HREF="#nodename">Erlang Node Name</A></H2><!--SEC END --><P> <A NAME="nodename"></A> </P><P>An Erlang node may have a node name.
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc82">5.4</A>&#XA0;&#XA0;<A HREF="#nodename">Erlang Node Name</A></H2><!--SEC END --><P> <A NAME="nodename"></A> </P><P>An Erlang node may have a node name.
The name can be short (if indicated with the command-line parameter <TT>-sname</TT>)
or long (if indicated with the parameter <TT>-name</TT>).
Starting an Erlang node with -sname limits the communication between Erlang nodes to the LAN.</P><P>Using the option <TT>-sname</TT> instead of <TT>-name</TT> is a simple method
@ -3901,7 +3934,7 @@ However, it is not ultimately effective to prevent access to the Erlang node,
because it may be possible to fake the fact that you are on another network
using a modified version of Erlang <TT>epmd</TT>.
The recommended way to secure the Erlang node is to block the port 4369.</P><P> <A NAME="secure-files"></A> </P><!--TOC section Securing Sensitive Files-->
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc82">5.5</A>&#XA0;&#XA0;<A HREF="#secure-files">Securing Sensitive Files</A></H2><!--SEC END --><P> <A NAME="secure-files"></A> </P><P><TT>ejabberd</TT> stores sensitive data in the file system either in plain text or binary files.
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc83">5.5</A>&#XA0;&#XA0;<A HREF="#secure-files">Securing Sensitive Files</A></H2><!--SEC END --><P> <A NAME="secure-files"></A> </P><P><TT>ejabberd</TT> stores sensitive data in the file system either in plain text or binary files.
The file system permissions should be set to only allow the proper user to read,
write and execute those files and directories.</P><DL CLASS="description"><DT CLASS="dt-description">
<B><TT>ejabberd configuration file: /etc/ejabberd/ejabberd.cfg</TT></B></DT><DD CLASS="dd-description">
@ -3921,9 +3954,9 @@ so it is preferable to secure the whole <TT>/var/lib/ejabberd/</TT> directory.
</DD><DT CLASS="dt-description"><B><TT>Erlang cookie file: /var/lib/ejabberd/.erlang.cookie</TT></B></DT><DD CLASS="dd-description">
See section <A HREF="#cookie">5.3</A>.
</DD></DL><P> <A NAME="clustering"></A> </P><!--TOC chapter Clustering-->
<H1 CLASS="chapter"><!--SEC ANCHOR --><A NAME="htoc83">Chapter&#XA0;6</A>&#XA0;&#XA0;<A HREF="#clustering">Clustering</A></H1><!--SEC END --><P> <A NAME="clustering"></A>
<H1 CLASS="chapter"><!--SEC ANCHOR --><A NAME="htoc84">Chapter&#XA0;6</A>&#XA0;&#XA0;<A HREF="#clustering">Clustering</A></H1><!--SEC END --><P> <A NAME="clustering"></A>
</P><P> <A NAME="howitworks"></A> </P><!--TOC section How it Works-->
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc84">6.1</A>&#XA0;&#XA0;<A HREF="#howitworks">How it Works</A></H2><!--SEC END --><P> <A NAME="howitworks"></A>
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc85">6.1</A>&#XA0;&#XA0;<A HREF="#howitworks">How it Works</A></H2><!--SEC END --><P> <A NAME="howitworks"></A>
</P><P>A XMPP domain is served by one or more <TT>ejabberd</TT> nodes. These nodes can
be run on different machines that are connected via a network. They all
must have the ability to connect to port 4369 of all another nodes, and must
@ -3937,29 +3970,29 @@ router,
</LI><LI CLASS="li-itemize">session manager,
</LI><LI CLASS="li-itemize">s2s manager.
</LI></UL><P> <A NAME="router"></A> </P><!--TOC subsection Router-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc85">6.1.1</A>&#XA0;&#XA0;<A HREF="#router">Router</A></H3><!--SEC END --><P> <A NAME="router"></A>
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc86">6.1.1</A>&#XA0;&#XA0;<A HREF="#router">Router</A></H3><!--SEC END --><P> <A NAME="router"></A>
</P><P>This module is the main router of XMPP packets on each node. It
routes them based on their destination&#X2019;s domains. It uses a global
routing table. The domain of the packet&#X2019;s destination is searched in the
routing table, and if it is found, the packet is routed to the
appropriate process. If not, it is sent to the s2s manager.</P><P> <A NAME="localrouter"></A> </P><!--TOC subsection Local Router-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc86">6.1.2</A>&#XA0;&#XA0;<A HREF="#localrouter">Local Router</A></H3><!--SEC END --><P> <A NAME="localrouter"></A>
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc87">6.1.2</A>&#XA0;&#XA0;<A HREF="#localrouter">Local Router</A></H3><!--SEC END --><P> <A NAME="localrouter"></A>
</P><P>This module routes packets which have a destination domain equal to
one of this server&#X2019;s host names. If the destination JID has a non-empty user
part, it is routed to the session manager, otherwise it is processed depending
on its content.</P><P> <A NAME="sessionmanager"></A> </P><!--TOC subsection Session Manager-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc87">6.1.3</A>&#XA0;&#XA0;<A HREF="#sessionmanager">Session Manager</A></H3><!--SEC END --><P> <A NAME="sessionmanager"></A>
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc88">6.1.3</A>&#XA0;&#XA0;<A HREF="#sessionmanager">Session Manager</A></H3><!--SEC END --><P> <A NAME="sessionmanager"></A>
</P><P>This module routes packets to local users. It looks up to which user
resource a packet must be sent via a presence table. Then the packet is
either routed to the appropriate c2s process, or stored in offline
storage, or bounced back.</P><P> <A NAME="s2smanager"></A> </P><!--TOC subsection s2s Manager-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc88">6.1.4</A>&#XA0;&#XA0;<A HREF="#s2smanager">s2s Manager</A></H3><!--SEC END --><P> <A NAME="s2smanager"></A>
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc89">6.1.4</A>&#XA0;&#XA0;<A HREF="#s2smanager">s2s Manager</A></H3><!--SEC END --><P> <A NAME="s2smanager"></A>
</P><P>This module routes packets to other XMPP servers. First, it
checks if an opened s2s connection from the domain of the packet&#X2019;s
source to the domain of the packet&#X2019;s destination exists. If that is the case,
the s2s manager routes the packet to the process
serving this connection, otherwise a new connection is opened.</P><P> <A NAME="cluster"></A> </P><!--TOC section Clustering Setup-->
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc89">6.2</A>&#XA0;&#XA0;<A HREF="#cluster">Clustering Setup</A></H2><!--SEC END --><P> <A NAME="cluster"></A>
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc90">6.2</A>&#XA0;&#XA0;<A HREF="#cluster">Clustering Setup</A></H2><!--SEC END --><P> <A NAME="cluster"></A>
</P><P>Suppose you already configured <TT>ejabberd</TT> on one machine named (<TT>first</TT>),
and you need to setup another one to make an <TT>ejabberd</TT> cluster. Then do
following steps:</P><OL CLASS="enumerate" type=1><LI CLASS="li-enumerate">
@ -3997,10 +4030,10 @@ and &#X2018;<CODE>access</CODE>&#X2019; options because they will be taken from
enabled only on one machine in the cluster.
</LI></OL><P>You can repeat these steps for other machines supposed to serve this
domain.</P><P> <A NAME="servicelb"></A> </P><!--TOC section Service Load-Balancing-->
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc90">6.3</A>&#XA0;&#XA0;<A HREF="#servicelb">Service Load-Balancing</A></H2><!--SEC END --><P> <A NAME="servicelb"></A>
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc91">6.3</A>&#XA0;&#XA0;<A HREF="#servicelb">Service Load-Balancing</A></H2><!--SEC END --><P> <A NAME="servicelb"></A>
</P><P> <A NAME="componentlb"></A> </P><!--TOC subsection Components Load-Balancing-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc91">6.3.1</A>&#XA0;&#XA0;<A HREF="#componentlb">Components Load-Balancing</A></H3><!--SEC END --><P> <A NAME="componentlb"></A> </P><P> <A NAME="domainlb"></A> </P><!--TOC subsection Domain Load-Balancing Algorithm-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc92">6.3.2</A>&#XA0;&#XA0;<A HREF="#domainlb">Domain Load-Balancing Algorithm</A></H3><!--SEC END --><P> <A NAME="domainlb"></A>
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc92">6.3.1</A>&#XA0;&#XA0;<A HREF="#componentlb">Components Load-Balancing</A></H3><!--SEC END --><P> <A NAME="componentlb"></A> </P><P> <A NAME="domainlb"></A> </P><!--TOC subsection Domain Load-Balancing Algorithm-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc93">6.3.2</A>&#XA0;&#XA0;<A HREF="#domainlb">Domain Load-Balancing Algorithm</A></H3><!--SEC END --><P> <A NAME="domainlb"></A>
</P><P><TT>ejabberd</TT> includes an algorithm to load balance the components that are plugged on an <TT>ejabberd</TT> cluster. It means that you can plug one or several instances of the same component on each <TT>ejabberd</TT> cluster and that the traffic will be automatically distributed.</P><P>The default distribution algorithm try to deliver to a local instance of a component. If several local instances are available, one instance is chosen randomly. If no instance is available locally, one instance is chosen randomly among the remote component instances.</P><P>If you need a different behaviour, you can change the load balancing behaviour with the option <TT>domain_balancing</TT>. The syntax of the option is the following:
</P><DL CLASS="description"><DT CLASS="dt-description"><B><TT>{domain_balancing, "component.example.com", BalancingCriteria}.</TT></B></DT></DL><P>Several balancing criteria are available:
</P><UL CLASS="itemize"><LI CLASS="li-itemize">
@ -4009,12 +4042,12 @@ domain.</P><P> <A NAME="servicelb"></A> </P><!--TOC section Service Load-Balanci
</LI><LI CLASS="li-itemize"><TT>bare_destination</TT>: the bare JID (without resource) of the packet <TT>to</TT> attribute is used.
</LI><LI CLASS="li-itemize"><TT>bare_source</TT>: the bare JID (without resource) of the packet <TT>from</TT> attribute is used.
</LI></UL><P>If the value corresponding to the criteria is the same, the same component instance in the cluster will be used.</P><P> <A NAME="lbbuckets"></A> </P><!--TOC subsection Load-Balancing Buckets-->
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc93">6.3.3</A>&#XA0;&#XA0;<A HREF="#lbbuckets">Load-Balancing Buckets</A></H3><!--SEC END --><P> <A NAME="lbbuckets"></A>
<H3 CLASS="subsection"><!--SEC ANCHOR --><A NAME="htoc94">6.3.3</A>&#XA0;&#XA0;<A HREF="#lbbuckets">Load-Balancing Buckets</A></H3><!--SEC END --><P> <A NAME="lbbuckets"></A>
</P><P>When there is a risk of failure for a given component, domain balancing can cause service trouble. If one component is failing the service will not work correctly unless the sessions are rebalanced.</P><P>In this case, it is best to limit the problem to the sessions handled by the failing component. This is what the <TT>domain_balancing_component_number</TT> option does, making the load balancing algorithm not dynamic, but sticky on a fix number of component instances.</P><P>The syntax is:
</P><DL CLASS="description"><DT CLASS="dt-description"><B><TT>{domain_balancing_component_number, "component.example.com", Number}.</TT></B></DT></DL><P> <A NAME="debugging"></A> </P><!--TOC chapter Debugging-->
<H1 CLASS="chapter"><!--SEC ANCHOR --><A NAME="htoc94">Chapter&#XA0;7</A>&#XA0;&#XA0;<A HREF="#debugging">Debugging</A></H1><!--SEC END --><P> <A NAME="debugging"></A>
<H1 CLASS="chapter"><!--SEC ANCHOR --><A NAME="htoc95">Chapter&#XA0;7</A>&#XA0;&#XA0;<A HREF="#debugging">Debugging</A></H1><!--SEC END --><P> <A NAME="debugging"></A>
</P><P> <A NAME="logfiles"></A> </P><!--TOC section Log Files-->
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc95">7.1</A>&#XA0;&#XA0;<A HREF="#logfiles">Log Files</A></H2><!--SEC END --><P> <A NAME="logfiles"></A> </P><P>An <TT>ejabberd</TT> node writes two log files:
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc96">7.1</A>&#XA0;&#XA0;<A HREF="#logfiles">Log Files</A></H2><!--SEC END --><P> <A NAME="logfiles"></A> </P><P>An <TT>ejabberd</TT> node writes two log files:
</P><DL CLASS="description"><DT CLASS="dt-description">
<B><TT>ejabberd.log</TT></B></DT><DD CLASS="dd-description"> is the ejabberd service log, with the messages reported by <TT>ejabberd</TT> code
</DD><DT CLASS="dt-description"><B><TT>erlang.log</TT></B></DT><DD CLASS="dd-description"> is the Erlang/OTP system log, with the messages reported by Erlang/OTP using SASL (System Architecture Support Libraries)
@ -4039,12 +4072,12 @@ The ejabberdctl command <TT>reopen-log</TT>
(please refer to section <A HREF="#ectl-commands">4.1.1</A>)
reopens the log files,
and also renames the old ones if you didn&#X2019;t rename them.</P><P> <A NAME="debugconsole"></A> </P><!--TOC section Debug Console-->
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc96">7.2</A>&#XA0;&#XA0;<A HREF="#debugconsole">Debug Console</A></H2><!--SEC END --><P> <A NAME="debugconsole"></A> </P><P>The Debug Console is an Erlang shell attached to an already running <TT>ejabberd</TT> server.
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc97">7.2</A>&#XA0;&#XA0;<A HREF="#debugconsole">Debug Console</A></H2><!--SEC END --><P> <A NAME="debugconsole"></A> </P><P>The Debug Console is an Erlang shell attached to an already running <TT>ejabberd</TT> server.
With this Erlang shell, an experienced administrator can perform complex tasks.</P><P>This shell gives complete control over the <TT>ejabberd</TT> server,
so it is important to use it with extremely care.
There are some simple and safe examples in the article
<A HREF="http://www.ejabberd.im/interconnect-erl-nodes">Interconnecting Erlang Nodes</A></P><P>To exit the shell, close the window or press the keys: control+c control+c.</P><P> <A NAME="watchdog"></A> </P><!--TOC section Watchdog Alerts-->
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc97">7.3</A>&#XA0;&#XA0;<A HREF="#watchdog">Watchdog Alerts</A></H2><!--SEC END --><P> <A NAME="watchdog"></A>
<H2 CLASS="section"><!--SEC ANCHOR --><A NAME="htoc98">7.3</A>&#XA0;&#XA0;<A HREF="#watchdog">Watchdog Alerts</A></H2><!--SEC END --><P> <A NAME="watchdog"></A>
</P><P><TT>ejabberd</TT> includes a watchdog mechanism that may be useful to developers
when troubleshooting a problem related to memory usage.
If a process in the <TT>ejabberd</TT> server consumes more memory than the configured threshold,
@ -4064,7 +4097,7 @@ or in a conversation with the watchdog alert bot.</P><P>The syntax is:
To remove all watchdog admins, set the option with an empty list:
</P><PRE CLASS="verbatim">{watchdog_admins, []}.
</PRE><P> <A NAME="i18ni10n"></A> </P><!--TOC chapter Internationalization and Localization-->
<H1 CLASS="chapter"><!--SEC ANCHOR --><A NAME="htoc98">Appendix&#XA0;A</A>&#XA0;&#XA0;<A HREF="#i18ni10n">Internationalization and Localization</A></H1><!--SEC END --><P> <A NAME="i18ni10n"></A>
<H1 CLASS="chapter"><!--SEC ANCHOR --><A NAME="htoc99">Appendix&#XA0;A</A>&#XA0;&#XA0;<A HREF="#i18ni10n">Internationalization and Localization</A></H1><!--SEC END --><P> <A NAME="i18ni10n"></A>
</P><P>The source code of <TT>ejabberd</TT> supports localization.
The translators can edit the
<A HREF="http://www.gnu.org/software/gettext/">gettext</A> .po files
@ -4099,9 +4132,9 @@ HTTP header &#X2018;Accept-Language: ru&#X2019;</TD></TR>
</TABLE></DIV>
<A NAME="fig:webadmmainru"></A>
<DIV CLASS="center"><HR WIDTH="80%" SIZE=2></DIV></DIV></BLOCKQUOTE><P> <A NAME="releasenotes"></A> </P><!--TOC chapter Release Notes-->
<H1 CLASS="chapter"><!--SEC ANCHOR --><A NAME="htoc99">Appendix&#XA0;B</A>&#XA0;&#XA0;<A HREF="#releasenotes">Release Notes</A></H1><!--SEC END --><P> <A NAME="releasenotes"></A>
<H1 CLASS="chapter"><!--SEC ANCHOR --><A NAME="htoc100">Appendix&#XA0;B</A>&#XA0;&#XA0;<A HREF="#releasenotes">Release Notes</A></H1><!--SEC END --><P> <A NAME="releasenotes"></A>
</P><P>Release notes are available from <A HREF="http://www.process-one.net/en/ejabberd/release_notes/">ejabberd Home Page</A></P><P> <A NAME="acknowledgements"></A> </P><!--TOC chapter Acknowledgements-->
<H1 CLASS="chapter"><!--SEC ANCHOR --><A NAME="htoc100">Appendix&#XA0;C</A>&#XA0;&#XA0;<A HREF="#acknowledgements">Acknowledgements</A></H1><!--SEC END --><P> <A NAME="acknowledgements"></A> </P><P>Thanks to all people who contributed to this guide:
<H1 CLASS="chapter"><!--SEC ANCHOR --><A NAME="htoc101">Appendix&#XA0;C</A>&#XA0;&#XA0;<A HREF="#acknowledgements">Acknowledgements</A></H1><!--SEC END --><P> <A NAME="acknowledgements"></A> </P><P>Thanks to all people who contributed to this guide:
</P><UL CLASS="itemize"><LI CLASS="li-itemize">
Alexey Shchepin (<A HREF="xmpp:aleksey@jabber.ru"><TT>xmpp:aleksey@jabber.ru</TT></A>)
</LI><LI CLASS="li-itemize">Badlop (<A HREF="xmpp:badlop@jabberes.org"><TT>xmpp:badlop@jabberes.org</TT></A>)
@ -4113,7 +4146,7 @@ Alexey Shchepin (<A HREF="xmpp:aleksey@jabber.ru"><TT>xmpp:aleksey@jabber.ru</TT
</LI><LI CLASS="li-itemize">Sergei Golovan (<A HREF="xmpp:sgolovan@nes.ru"><TT>xmpp:sgolovan@nes.ru</TT></A>)
</LI><LI CLASS="li-itemize">Vsevolod Pelipas (<A HREF="xmpp:vsevoload@jabber.ru"><TT>xmpp:vsevoload@jabber.ru</TT></A>)
</LI></UL><P> <A NAME="copyright"></A> </P><!--TOC chapter Copyright Information-->
<H1 CLASS="chapter"><!--SEC ANCHOR --><A NAME="htoc101">Appendix&#XA0;D</A>&#XA0;&#XA0;<A HREF="#copyright">Copyright Information</A></H1><!--SEC END --><P> <A NAME="copyright"></A> </P><P>Ejabberd Installation and Operation Guide.<BR>
<H1 CLASS="chapter"><!--SEC ANCHOR --><A NAME="htoc102">Appendix&#XA0;D</A>&#XA0;&#XA0;<A HREF="#copyright">Copyright Information</A></H1><!--SEC END --><P> <A NAME="copyright"></A> </P><P>Ejabberd Installation and Operation Guide.<BR>
Copyright &#XA9; 2003 &#X2014; 2010 ProcessOne</P><P>This document is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2