Hello @kd7lmn,
For mobile users such as yourself I recommend using a micro-node.com RTCM connected directly to your mobile node radio. No node computer is needed in the mobile. RTCMs always connects back to the Allstar server. You don’t need to open any ports at the RTCM end. We use them on cellular connections.
Think of the RTCM as sound fob connected over the IP network. The RTCM replaces the node and sound fob in your mobile. You only need the one node back at your VPS (or home).
Also (you’ll like this part) the RTCM sends a programmable CW message when it connects to the node and a different CW message when it disconnects. The default disconnect message is LINK OFF and the default connect message is OK. Even if your CW is a poor as mine you know the status just by the length of the message. Actually it’s pretty easy to recognize OK ha! - - - - . -