<!-- @(#) $Id$
  -  Official Courier rules for OSSEC.
  -
  -  Copyright (C) 2009 Trend Micro Inc.
  -  All rights reserved.
  -
  -  This program is a free software; you can redistribute it
  -  and/or modify it under the terms of the GNU General Public
  -  License (version 2) as published by the FSF - Free Software
  -  Foundation.
  -
  -  License details: http://www.ossec.net/en/licensing.html
  -->

<!-- Using logs from: http://www.ossec.net/wiki/index.php/Courier -->

<group name="syslog,courier,">
  <rule id="3900" level="0">
    <decoded_as>courier</decoded_as>
    <description>Grouping for the courier rules.</description>
  </rule>
  
  <rule id="3901" level="3">
    <if_sid>3900</if_sid>
    <match>^Connection, </match>
    <description>New courier (imap/pop3) connection.</description>
    <group>connection_attempt,</group>
  </rule>

  <rule id="3902" level="5">
    <if_sid>3900</if_sid>
    <match>^LOGIN FAILED,| FAILED:</match>
    <description>Courier (imap/pop3) authentication failed.</description>
    <group>authentication_failed,</group>
  </rule>

  <rule id="3903" level="0">
    <if_sid>3900</if_sid>
    <match>^LOGOUT,|^DISCONNECTED</match>
    <description>Courier logout/timeout.</description>
  </rule>

  <rule id="3904" level="3">
    <if_sid>3900</if_sid> 
    <match>^LOGIN,</match>
    <description>Courier (imap/pop3) authentication success.</description>
    <group>authentication_success,</group>
  </rule>  
  
  <rule id="3910" level="10" frequency="10" timeframe="30">
    <if_matched_sid>3902</if_matched_sid>
    <description>Courier brute force (multiple failed logins).</description>
    <group>authentication_failures,</group>
    <same_source_ip />
  </rule>

  <rule id="3911" level="10" frequency="15" timeframe="30">
    <if_matched_sid>3901</if_matched_sid>
    <same_source_ip />
    <description>Multiple connection attempts from same source.</description>
    <group>recon,</group>
  </rule>
</group> <!-- SYSLOG,COURIER -->


<!-- EOF -->
