[omniORB] can I access ORB 1) within VPN and 2)across a firewall

[Mohan]

Hi All,

I want to know that weather it is possible to access a server ORB 1) within
a VPN 2) and across a firewall.
If this is possible can you please tell me that where can I find best omni
example programs on the above topics.

Thanks,
Ram