Eu fiz sua pergunta na lista de discussão OpenNMS-discuss (archive ) e recebi a seguinte resposta:
Assuming you are using jetty, you can modify
$OPENNMS_HOME/jetty-webapps/opennms/WEB-INF/applicationContext-acegi-security.xmland addROLE_ANONYMOUSto the pages you would like to be visible without logging in. Probably OK in a friendly environment, but perhaps not if you are highly concerned about security issues. (If you're not using jetty, itswebappsinstead ofjetty-webappsin the path)See also http://www.opennms.org/wiki/Dashboard#Anonymous_dashboards
--Bill--