Aha, looking at you terminal screenshot I see that share-session was started successfully.

Now, on your remote PC you would need to launch KStars/Ekos and create profile for your remote-connection - please see attachment with arrows where you need to enter information. The save this profile and try to connect. You should see all your equipment in Ekos controlled remotely.

That api-port=8787 is internal thing not needed by guest, sorry it is confusing (that port actually used to communicate with indihub-agent from INDI Web Manager if you decide to use it). All guest would need to know is INDI-server public host node-1.indihub.io and port 53362. Please note - this public host and port is alive as long as indihub-agent is running that session, if you stop and start indihub-agen in share-mode again then it will be other host and port.

Hope that helps!

According to guiding - I would try 1st KStars/Ekos internal guiding to have remote access working.
I've noticed on your screenshot PHD2 icon, indihub-agent actually can provide to PHD2 remote access as well, so guest can create remote profile in KStars/Ekos with PHD2 guiding.
 

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