It took me some time.
All around the site there are hints to the virtues of direct connection.
And in times of unstable proxys I really wanted to make it work.
But I wasn't able to use it.

The problem, I discovered, was the router.

But some time ago I found the following:
Are there really that many errors? page 2, Bad Mr Mojo explains port forwarding.
Problem solved. Since then I can use direct.

May be some more people find it usefull.