Eclipse connect to Geronimo on other host

Hi,

I've configured a new geronimo server in eclipse (3.4.2). The geronimo (2.1.4) itself is running on a different server. And now I've troubles to connect to the server.

If I got that right, the connection has to be done over RMI service (default port 1099). But my service does not show this as open port (checked with nmap), but on server startup I get the line:
Listening on ports:
...
1099 0.0.0.0 RMI Naming
...

Can somebody please light this a little bit up for me?!

Sorry for any inconvenience caused by a stupid question, but I'm really new to geronimo.

Regards
Michael