--- /dev/null
+<!-- @(#) $Id: ./etc/rules/telnetd_rules.xml, 2011/09/08 dcid Exp $
+
+ - Telnetd rules for OSSEC.
+ - Author: Ahmet Ozturk
+ - License: http://www.ossec.net/en/licensing.html
+ -->
+
+
+<group name="syslog,telnetd">
+ <rule id="5600" level="0" noalert="1">
+ <match>telnetd</match>
+ <description>Grouping for the telnetd rules</description>
+ </rule>
+
+ <rule id="5601" level="5">
+ <if_sid>5600</if_sid>
+ <match>refused connect from </match>
+ <description>Connection refused by TCP Wrappers.</description>
+ </rule>
+
+ <rule id="5602" level="3">
+ <if_sid>5600</if_sid>
+ <match>: connect from </match>
+ <description>Remote host established a telnet connection.</description>
+ </rule>
+
+ <rule id="5603" level="5" timeframe="1">
+ <match>ttloop: peer died:|ttloop: read:</match>
+ <if_matched_sid>5602</if_matched_sid>
+ <description>Remote host invalid connection.</description>
+ </rule>
+
+ <rule id="5604" level="5">
+ <match>warning: can't verify hostname:</match>
+ <description>Reverse lookup error (bad hostname config).</description>
+ </rule>
+
+ <rule id="5631" level="10" frequency="6" timeframe="120">
+ <if_matched_sid>5602</if_matched_sid>
+ <same_source_ip />
+ <description>Multiple connection attempts from same source </description>
+ <description>(possible scan).</description>
+ </rule>
+
+</group> <!-- SYSLOG,TELNETD -->