Currently it's only possible to either have your server open to everyone, or nobody, with a very basic ban system in place. What this leads to, is bar-me being actively monitoring my DD and banning everyone who isn't someone I want on my server, needing to open the port, let my friends or whomever in, then closing the port again. This is kind of impractical since players can need to disconnect at any time, and whilst I know this issue can easily be avoided via communication channels, it really shouldn't even need to be an issue.

I can't see any downside to implementing a simple whitelisted server option that would restrict access to everyone (Optionally giving a message perhaps, such as 'PvP Top 10 Tournament currently in progress!') aside from those who are allowed in.

-El Wookie