Server is behind NAT firewall. Client code:
Properties topicProperties = new Properties();
topicProperties.put(Context.INITIAL_CONTEXT_FACTORY, "org.jboss.naming.remote.client.InitialContextFactory");
topicProperties.put(Context.PROVIDER_URL, "http-remoting://" + host + ":" + port);
InitialContext ctx = new InitialContext(topicProperties);
ConnectionFactory tmp = (ConnectionFactory) topicCtx.lookup("jms/RemoteConnectionFactory");
connection = tmp.createConnection();

Jun 11, 2015 8:26:07 AM org.xnio.Xnio <clinit>
INFO: XNIO version 3.3.1.Final
Jun 11, 2015 8:26:07 AM org.xnio.nio.NioXnio <clinit>
INFO: XNIO NIO Implementation Version 3.3.1.Final
Jun 11, 2015 8:26:07 AM org.jboss.remoting3.EndpointImpl <clinit>
INFO: JBoss Remoting version 4.0.9.Final
javax.jms.JMSException: Failed to create session factory
at org.hornetq.jms.client.HornetQConnectionFactory.createConnectionInternal(HornetQConnectionFactory.java:673)
at org.hornetq.jms.client.HornetQConnectionFactory.createConnection(HornetQConnectionFactory.java:112)
at org.hornetq.jms.client.HornetQConnectionFactory.createConnection(HornetQConnectionFactory.java:107)
at com.lmco.spacefence.netcentric.test.client.TestMessageConsumer.<init>(TestMessageConsumer.java:36)
at com.lmco.spacefence.netcentric.test.client.TestMessageConsumer.main(TestMessageConsumer.java:24)
Caused by: HornetQNotConnectedException[errorType=NOT_CONNECTED message=HQ119007: Cannot connect to server(s). Tried with all available servers.]
at org.hornetq.core.client.impl.ServerLocatorImpl.createSessionFactory(ServerLocatorImpl.java:905)
at org.hornetq.jms.client.HornetQConnectionFactory.createConnectionInternal(HornetQConnectionFactory.java:669)
... 4 more
Disconnected from the target VM, address: '127.0.0.1:54275', transport: 'socket'

Client debugger shows the ConnectionFactory instance returned:

initialConnectors =

{org.hornetq.api.core.TransportConfiguration[1]@2183}

0 =

{org.hornetq.api.core.TransportConfiguration@2196}

"TransportConfiguration(name=http-connector, factory=org-hornetq-core-remoting-impl-netty-NettyConnectorFactory) ?port=8080&host=10-10-20-77&http-upgrade-enabled=true&http-upgrade-endpoint=http-acceptor"
name =

{java.lang.String@2198}

"http-connector"
factoryClassName =

{java.lang.String@2199}

"org.hornetq.core.remoting.impl.netty.NettyConnectorFactory"
params =

{java.util.HashMap@2200}

size = 4
0 =

{java.util.HashMap$Node@2203}

"port" -> "8080"
1 =

{java.util.HashMap$Node@2204}

"host" -> "10.10.20.77"
2 =

{java.util.HashMap$Node@2205}

"http-upgrade-enabled" -> "true"
3 =

{java.util.HashMap$Node@2206}

"http-upgrade-endpoint" -> "http-acceptor"

10.10.20.77 is IP address of server behind firewall, NOT the IP address used by the client.