Unfortunately, while setting up a BS for use within an office LAN is a piece of cake, the initial setup for access over the internet takes time and knowledge and is slightly different in every office due to equipment differences.
I do think that Graphisoft should have a document that illustrates the steps for at least one common router (e.g., Netgear/etc) and DSL/Cable modem so that people can use that as a basis to figure out their own situation. The only information that they provide that I know of is the article I mentioned earlier:
http://www.archicadwiki.com/Teamwork/BimServerRemoteConnection
Graphisoft gives an illustration of port forwarding for a completely separate process - sharing a WIBU key over the internet - in this article:
http://www.archicadwiki.com/TechNotes/Example%20of%20Using%20Wibu%20Key%20Over%20The%20Internet%20wi...
The blue screenshots there show the idea of what must be done for BS: you have to forward all BS ports to the local IP address of the machine hosting BS. This way, when someone outside the office tries to access your BS via your domain name, the router sends those requests to the BS machine for processing.
Trying to connect to your BS will not tell me much. I would have to Skype screenshare with you as the router/modem/etc setup can only be done "inside" the LAN. This can take a fair amount of time that I don't have at the moment, but would want to get paid for. It may be best to hire an IT person there, someone familiar with network setup.
Cheers,
Karl
One of the forum moderators
AC 28 USA and earlier • macOS Sonoma 14.7.1, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB