visigenic visibroker protocols through firewalls

[Jyri Kaljundi <jk () stallion ee>]

Does anyone have any information about how to let VisiBroker protocols
(some kind of Java ORB IIOP protocol, to build Java client-server
applications, made by company called VisiGenic www.visigenic.com now owned
by Borland) through firewalls? 

Are there specifications for how the protocols work, what must be opened
to let them through?

We are using address translation and I am afraid it might be so that the
protocols embed IP numbers inside the packets, so when client connects to
server, the server tries to connect back to clients internal address
(client in internal net, server in DMZ). 

Jyri Kaljundi
jk () stallion ee
AS Stallion Ltd
http://www.stallion.ee/