2 - Example of MS Exchange rules for OSSEC.
4 - Copyright (C) 2009 Trend Micro Inc.
7 - This program is a free software; you can redistribute it
8 - and/or modify it under the terms of the GNU General Public
9 - License (version 2) as published by the FSF - Free Software
12 - License details: http://www.ossec.net/en/licensing.html
16 <!-- Still BETA - anyone using it? -->
19 <group name="ms,exchange,">
20 <rule id="3800" level="0">
21 <decoded_as>msexchange</decoded_as>
22 <description>Grouping of Exchange rules.</description>
25 <rule id="3801" level="4">
29 <description>E-mail rcpt is not valid (invalid account).</description>
33 <rule id="3802" level="4">
36 <description>E-mail 500 error code.</description>
40 <rule id="3851" level="9" frequency="10" timeframe="120" ignore="120">
41 <if_matched_sid>3801</if_matched_sid>
43 <description>Multiple e-mail attempts to an invalid account.</description>
44 <group>multiple_spam,</group>
47 <rule id="3852" level="9" frequency="12" timeframe="120" ignore="240">
48 <if_matched_sid>3802</if_matched_sid>
50 <description>Multiple e-mail 500 error code (spam).</description>
51 <group>multiple_spam,</group>
55 </group> <!-- MS,Exchange -->