I have a JBoss AS 7.1.1 deployed in a machine with the environment detailed above. In this JBoss I have 4 queues deployed.

I run Jboss as follows:
./standalone.sh -c standalone-full.xml -b xxx.xxx.xx.xxx -bmanagement=xxx.xxx.xx.xxx &

I have successfully connected HermesJMS from a remote machine (also using Linux) to the JBoss queues.

However, when I try to connect to the queues from a custom application hosted in a remote machine using HP-UX, I get the following error:
javax.jms.JMSException: Failed to create session factory
at org.hornetq.jms.client.HornetQConnectionFactory.createConnectionInternal(HornetQConnectionFactory.java:615)
at org.hornetq.jms.client.HornetQConnectionFactory.createConnection(HornetQConnectionFactory.java:121)
at org.hornetq.jms.client.HornetQConnectionFactory.createConnection(HornetQConnectionFactory.java:116)
Caused by: HornetQException[errorCode=2 message=Cannot connect to server(s). Tried with all available servers.]
at org.hornetq.core.client.impl.ServerLocatorImpl.createSessionFactory(ServerLocatorImpl.java:619)
at org.hornetq.jms.client.HornetQConnectionFactory.createConnectionInternal(HornetQConnectionFactory.java:611)
... 6 more

I'm quite sure that it is not a connectivity issue because if I configure a wrong username/password it says: Invalid username or password so it's connecting properly to JBoss. The problem is when connecting to the queues.

Regarding the configuration of our custom application, it is exactly the same than the one used in HermesJMS (also the same libraries), so it should be ok as HermesJMS connects properly.

The only difference is in the Operating System: JBoss and HermesJMS are installed in Linux while our custom application is installed in HP-UX. May this be an issue?

Regards