Just installed OpenFire on a fresh AWS instance. Opened the correct port (5222 for IM and 9090 for admin). I created a user, but when trying to connect from any client (tried miranda and pidjin) I get the following Java Exception in the OpenFire logs:
2016.03.28 22:27:48 INFO [pool-22-thread-4]: org.jivesoftware.openfire.session.LocalOutgoingServerSession[Authenticate local domain: ‘’ to remote domain: ‘proxy.eu.jabber.org’] - Unable to authenticate: Remote domain is not accessible according to our configuration (typical causes: server federation is disabled, or domain is blacklisted).
2016.03.28 22:27:48 WARN [socket_c2s-thread-2]: org.jivesoftware.openfire.nio.ConnectionHandler - Closing connection due to exception in session: (0x00000034: nio socket, server, / => /:5222)
java.lang.NoSuchMethodError: java.util.concurrent.ConcurrentHashMap.keySet()Ljava/util/concurrent/Concurrent HashMap$KeySetView;
What am I missing!?!?!