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<html>
<head>
<meta http-equiv="Content-Language" content="en">
<title>Understanding rsyslog queues</title>
</head>
<body>
<h1>SNMP Output Module</h1>
<p><b>Module Name: omsnmp</b></p>
<p><b>Author: Andre Lorbach <alorbach@adiscon.com></b></p>
<p><b>Description</b>:</p>
<p>Provides the ability to send syslog messages as an SNMPv1 & v2c traps. By
default, SNMPv2c is preferred. The syslog message is wrapped into a OCTED
STRING variable, by default with the OID i.o.d.internet.private.enterprises.
This module uses the <a target="_blank" href="http://net-snmp.sourceforge.net/">
NET-SNMP</a> library. In order to compile this module, you will need to have the
<a target="_blank" href="http://net-snmp.sourceforge.net/">NET-SNMP</a>
developer (headers) package installed. </p>
<p> </p>
<p><b>Action Line:</b></p>
<p>%omsnmp% without any further parameters.</p>
<p> </p>
<p><b>Configuration Directives</b>:</p>
<ul>
<li><strong>$actionsnmptransport </strong>(This parameter is optional, the
default value is "udp")<br>
<br>
Defines the transport type you wish to use. Technically we can support all
transport types which are supported by NET-SNMP. <br>
To name a few possible values: <br>
<br>
udp, tcp, udp6, tcp6, icmp, icmp6 ...<br>
<br>
Example: <strong>$actionsnmptransport udp<br>
</strong></li>
<li><strong>$actionsnmptarget</strong><br>
<br>
This can be a hostname or ip address, and is our snmp target host. This
parameter is required, if the snmptarget is not defined, nothing will be
send. <br>
<br>
Example: <strong>$actionsnmptarget server.domain.xxx</strong><br>
</li>
<li><strong>$actionsnmptargetport </strong>(This parameter is optional, the
default value is "162")<br>
<br>
The port which will be used, common values are port 162 or 161. <br>
<br>
Example: <strong>$actionsnmptargetport 162</strong><br>
</li>
<li><strong>$actionsnmpversion </strong>(This parameter is optional, the
default value is "1")<br>
<br>
There can only be two choices for this parameter for now. <br>
0 means SNMPv1 will be used.<br>
1 means SNMPv2c will be used. <br>
Any other value will default to 1. <br>
<br>
Example: <strong>$actionsnmpversion 1</strong><br>
</li>
<li><strong>$actionsnmpcommunity </strong>(This parameter is optional, the
default value is "public")<br>
<br>
This sets the used SNMP Community.<br>
<br>
Example:<strong> $actionsnmpcommunity public</strong><br>
</li>
<li><strong>$actionsnmpsyslogmessageoid </strong>(This parameter is
optional, the default value is "1.3.6.1.4.1" which means "i.o.d.internet.private.enterprises")<br>
<br>
This OID will be used as a variable, type "OCTET STRING". This variable will
contain the full syslog message including syslog header. I also recommend to
use the default value here unless you require to use a different OID. <br>
<br>
Example: <strong>$actionsnmpsyslogmessageoid 1.3.6.1.4.1</strong><br>
</li>
<li><strong>$actionsnmpenterpriseoid </strong>(This parameter is optional,
the default value is "1.3.6.1.4.1.3.1.1" which means "enterprises.cmu.1.1")<br>
<br>
Customize this value if needed. I recommend to use the default value unless
you require to use a different OID. <br>
This configuration parameter is used for <strong>SNMPv1</strong> only. It
has no effect if <strong>SNMPv2</strong> is used. <br>
<br>
Example: <strong>$actionsnmpenterpriseoid 1.3.6.1.4.1.3.1.1 </strong><br>
</li>
<li><strong>$actionsnmpspecifictype </strong>(This parameter is optional,
the default value is "0")<strong> </strong><br>
<br>
This is the specific trap number. This configuration parameter is used for
<strong>SNMPv1</strong> only. It has no effect if <strong>SNMPv2</strong> is
used. <br>
<br>
Example: <strong>$actionsnmpspecifictype 0</strong><br>
</li>
<li><strong>$actionsnmptraptype</strong> (This parameter is optional, the
default value is "6" which means SNMP_TRAP_ENTERPRISESPECIFIC) <br>
<br>
There are only 7 Possible trap types defined which can be used here. These
trap types are: <br>
0 = SNMP_TRAP_COLDSTART<br>
1 = SNMP_TRAP_WARMSTART<br>
2 = SNMP_TRAP_LINKDOWN<br>
3 = SNMP_TRAP_LINKUP<br>
4 = SNMP_TRAP_AUTHFAIL<br>
5 = SNMP_TRAP_EGPNEIGHBORLOSS<br>
6 = SNMP_TRAP_ENTERPRISESPECIFIC<br>
<br>
Any other value will default to 6 automatically. This configuration
parameter is used for <strong>SNMPv1</strong> only. It has no effect if
<strong>SNMPv2</strong> is used. <br>
<br>
Example: <strong>$actionsnmptraptype 6</strong><br>
</li>
</ul>
<p> </p>
<p><b>Caveats/Known Bugs:</b></p>
<p><b>Sample:</b></p>
<p>The following commands send every message as a snmp trap.</p>
<textarea rows="10" cols="60">$ModLoad omsnmp.so
$actionsnmptransport udp
$actionsnmptarget localhost
$actionsnmptargetport 162
$actionsnmpversion 1
$actionsnmpcommunity public
*.* :omsnmp:
</textarea>
<p>[<a href="rsyslog_conf.html">rsyslog.conf overview</a>] [<a href="manual.html">manual
index</a>] [<a href="http://www.rsyslog.com/">rsyslog site</a>]</p>
<p><font size="2">This documentation is part of the
<a href="http://www.rsyslog.com/">rsyslog</a> project.<br>
Copyright © 2008 by <a href="http://www.gerhards.net/rainer">Rainer Gerhards</a> and
<a href="http://www.adiscon.com/">Adiscon</a>. Released under the GNU GPL
version 3 or higher.</font></p>
</body>
</html>
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