By default remote JMX is already enabled. It is configured to work over the http management interface.
So try removing the properties you added. Then read the Wildfly 13 manual on JMX Security  and JMX subsystem configuration  for some background.
Depending on the client you want to use you may need to add client dependencies. See the bundled script
bin/jconsole.[sh|bat] for the necessary jar files.
This DZone article  gives a good summary.