[arm-allstar] connect two nodes WITHOUT Allstar server ?

[Don Ritchie]

The way I understand it …
when any node connects to another it is “through” an allstar server.
As I\m not 100% sure about this, can someone please explain.
Is ALL the traffic handled by a server, or does the server just
tell the nodes how to find each other (DNS) ?
IF all the traffic goes through the server ( another Asterisk in the “sky”),
how can I connect two nodes to each other without an Allstar server.
ie, “order wire” for (interoffice communication) .
Direct IP to IP address ??

Thanks
Don, K8ZGW