My cable company has a very stringent policy against servers and if they detected one running off of my cable connection, a gang of unruly system administrators would probably tear me to shreds. Besides that, I already have a file and discussion server online. It's called DaveCentral, and you're soaking in it. HSX is shorthand for Hotline Server for Unix. It's sort of a throwback to the days of dialup Bulletin Board Systems, right around the time when those creations started to sport graphical user interfaces.
Server administrators can offer file libraries, real time chat, and a simple message base to users.
The difference between yesterday's BBS servers and Hotline is that no telephone lines are used for the latter. All Hotline users need is an Internet connection to gain access to thousands of Hotline servers around the world. Until recently, that server software was only available for the Mac OS and various flavors of Windows. Add, create, delete, or modify user accounts, creating various levels of access for different users. Each user can have his or her own private mailbox for messaging.