Fichtlwichtl

hey guys, i have a problem with the setup of the server... when i try to start the server with the created server.bat, it shows me after a few seconds in the cmd window "TCP connection closed". the server runs on a windows 2008r2 server. firewall settings checked - udk.exe has full access in and outgoing. which ports does the server need ? i cant find anything about that... i hope you understand what i mean, my english is not the best sorry thanks!