This tool does use alot of code from this project: https://github.com/tremwil/DS3ConnectionInfo
I´ve modified it a bit, so you can basicly have a whitelist, about who can connect to you.
You can edit the whitelist yourself!
Ping filter on = Everyone can connect, as long, as they match the ping limit.
Ping filter off = Only people, which ID´s are on the whitelist can connect.