Proxy from FIDUCIA

Dear Ladies and Sirs,

do you have any experience with the Proxy from FIDUCIA, which is a german company and ist used in most of the german banks? This proxy allows nothing but tcp/443 and 80.
The curious thing is, that udp seems to me not realy blocked, but it seems to be ignored, this means udp connection are excepted but not forwarded.

Thanks in Advance

Lorenz