End game hack is easy to patch so it isn't "rare".
@OP, unblock your ports (TCP & UDP.)
I think the range is:
TCP -> 27000 - 27050
UDP -> 3074
And a VPS is not actually needed but if you want your server online 24/7 then it'll be good. If you don't have a fast internet, I'd recommend a VPS else you could run it on your own PC.