Someone new to hosting wants to share a and a server with about 10 friends, and is asking how to do it without accidentally creating a serious security hole. Two main options are on the table.
is a tool that creates a private virtual network — friends install a small app and then connect as if they were on the same home network, without exposing anything to the public internet. The person wants to understand which approach is safer and simpler for a small trusted group, and what mistakes to avoid when opening a to the outside world for the first time.