When my node was up and running, I did use:
Originally Posted by KD8KCH
1) Linux server: NAT + IP_tables
2) EchoLink laptop + R-Admin software installed
I could connect to EchoLink PC by R-Admin viewer (remote desktop) and can turn on/off the node.
It was a port forwarding from Internet to local home Intranet. That worked when I was far away from my node and could not do it remotely on the air by handy-talkie.
I hope it helps a bit.
73! Tony RC3C ex.RV3DHC
QTH: Moscow, Troitsk