{page-component-title} Core has an embedded ActiveMQ instance for convenience that you can enable. 
It uses the same credentials configured from the web UI for users in the ROLE_MINION role.

.Edit ActiveMQ configuration file
[source, console]
----
sudo vi etc/opennms-activemq.xml
----

.Remove comments for the transport connector listening on 0.0.0.0 and save
[source, opennms-activemq.xml]
----
<transportConnector name="openwire" uri="tcp://0.0.0.0:61616?useJmx=false&amp;maximumConnections=1000&amp;wireformat.maxFrameSize=104857600"/>
----

.Restart {page-component-title} Core instance
[source, console]
----
sudo systemctl restart opennms
----

.Verify that ActiveMQ port is available on public network interface
[source, console]
----
ss -lnpt sport = :61616
----

.Verify listening 61616/tcp on all interfaces
[source, output]
----
State   Recv-Q  Send-Q  Local Address:Port  Peer  Address:Port
LISTEN  0       128     *:61616             *:*   users:(("java",pid=1,fd=706))
----

TIP: If you run a host firewall, allow port 61616/tcp, as in the following example with firewalld: +
     `sudo firewall-cmd --permanent --add-port=61616/tcp` +
     `sudo firewall-cmd --reload`
