I would like to find software that would allow access to a file server (local network at a church) via the internet so that some of the volunteers can use some of the files on it. It does not have a permanent IP address but I have seen articles that there is software that can handle that issue for connecting to it.
I am looking for software that can provide (in a secure form) for file access to specific directories (preferably based on the user) on the server.