opennms snmpv3 traps and informs

Question

I've deployed OpenNMS through the docker images and have SNMPv3 polling working but haven't been able to get SNMPv3 traps or informs working.

trapd-configuration.xml:

<?xml version="1.0"?>
<trapd-configuration snmp-trap-port="162" new-suspect-on-trap="true">
  <snmpv3-user
    security-name="trapuser"
    security-level="3"
    auth-passphrase="authsecret"
    auth-protocol="SHA"
    privacy-passphrase="privsecret"
    privacy-protocol="AES"/>
</trapd-configuration>

If I run the following from another host, which is being polled by OpenNMS via SNMPv3:

snmptrap -Dusm -v 3 -l authPriv -u trapuser -a SHA -A authsecret -x AES -X privsecret <opennms-host-ip> 42 coldStart.0

OpenNMS doesn't generate any event. In the trapd.log I can see the following warning:

2018-04-26 09:26:33,364 WARN  [DefaultUDPTransportMapping_0.0.0.0/162] o.s.MessageDispatcherImpl: statusInfo=1.3.6.1.6.3.15.1.1.3.0 = 0, status=1404

From what I can tell this relates to an unknown username.

Likewise informs aren't working either and I get the same warning in the trapd.log file and a similar one at the sender side. If I run tcpdump I can see it retrieve the remote engineID from opennms.

snmpinform -Dusm -v 3 -l authPriv -u trapuser -a SHA -A authsecret -x AES -X privsecret <opennms-host-ip> 42 coldStart.0
registered debug token usm, 1
usm: potentially bootstrapping the USM table from session data
usm: getting user
usm: USM processing has begun (offset 39)
usm: getting user
usm: Failed to find engine data.
usm: USM processing completed.
usm: USM processing begun...
usm: USM processing completed.
usm: potentially bootstrapping the USM table from session data
usm: no flag defined...  continuing
usm: user exists? x=(nil)
usm: Building user trapuser...
usm: USM processing has begun (offset 80)
usm: getting user trapuser
usm: match on user trapuser
usm: Encryption successful.
usm: USM processing completed.
usm: USM processing begun...
usm: match on user trapuser
usm: USM processing completed.
snmpinform: Unknown user name

Any ideas on what I'm doing wrong?

Answer 1

Can you please try the following:

open the $OPENNMS_HOME/etc/service-configuration.xml and start the Trapd daemon after the AsteriskGatway service. To do this locate the following XML block:

<service enabled="true">
    <name>OpenNMS:Name=Trapd</name>
    <class-name>org.opennms.netmgt.trapd.jmx.Trapd</class-name>
    <invoke method="init" pass="0" at="start"/>
    <invoke method="start" pass="1" at="start"/>
    <invoke method="status" pass="0" at="status"/>
    <invoke method="stop" pass="0" at="stop"/>
</service>

By default Trapd is started after the Correlator. Cut & Paste the whole service definition block after the AsteriskGateway service:

<service enabled="false">
    <name>OpenNMS:Name=AsteriskGateway</name>
    <class-name>org.opennms.netmgt.asterisk.agi.jmx.AsteriskGateway</class-name>
    <invoke method="init" pass="0" at="start"/>
    <invoke method="start" pass="1" at="start"/>
    <invoke method="status" pass="0" at="status"/>
    <invoke method="stop" pass="0" at="stop"/>
</service>

Can you try to get SNMPv3 Traps processed now?