HTTP tunneling (RMI over HTTP)

[Bob Coret]

Due to our strict firewall policies our web container one server A can't talk to the EJB container on server B using RMI over IIOP. This is due to the fact that, besides the JNDI port, CORBA wants to open ports dynamically for the "data transfer". Also the firewall between the two server does Network Address Translation.
An obvious solution (besides changing the security policy) is RMI over HTTP. In our WebSphere 5.0.2 console (on server A) there's (under Server > ORB services) a nice selection box where you can select ALWAYS for HTTP Tunneling and you can enter the HTTP Tunnel Agent. This agent is a servlet (for server B) which you have to incorporate on the EJB container. It's the standard com.ibm.CORBA.services.IIOPTunnelServlet. Of course, this easier said than done. Due to the lack of documentation it's trial and error.... and no working situation yet.
Has anyone got RMI over HTTP working under WebSphere 5.0.2?
Thanks,
Bob