When I first tried UT-Turbocheck, I thought it didn't work either.
But that's just an illusion made manifest by the mind
All I did was make
utmaster.epicgames.com:28900 primary.
And turn on
Include player info in the
Setup.
Then really
play around with the connection process
in order to wobble your habitual constrictions to oblivion

It really works!
Obviously (technical) port-related issues apply here too (firewall?),
but I assume(d) that most people posting here know about those things
For those who are not aware of every pixel on the screen

:
More master server background information is provided
in the second link of my first post.