We have a JBOSS 4.0.0 running on Linux and the JMS part is configured to use Oracle database. This server acts as an Admin server and will transmit messages to clients. The clients are running JBOSS 4.0 RC2 on Windows XP? If the firewall is turned off on the Linux box, messages are flowing to the clients. Even the client machines need to turn off firewall to receive messages. How to transmit messages with firewall turned on both at the server and client?