So I got that private node at a fix ip on the net.the port it run on is 4570 (4569 was not available cause of an asterisk pbx on the smae network) 

the node number is 1100

I know I have to add this to the node stanza in rpt.conf

1100 = radio@ipadressofthenode:4570/1100,NONE

But do I have to add something else somewhere?

I was under the impression I had to add something in extension.conf? 

Thanks for the help

ve2pf