Hello, I'm currently writing a client GUI for xrootd. The basics are working with a xrootd server, that does not require user authentification. Now I want to implement authentification, but failed at the time, when first connecting to the server. The library asks for a password on the commandline, which in a GUI is not visible. Looking at the code, I think something is wrong documented, as the request for the password comes during the XrdClientAdmin->Connect() call, which following the documentation in the code, is not doing login/authorization. So here are some questions: 1) Is there a way to find out, whether a server requires authorization, besides a failing connection? 2) How to do authorization not using the automatic detection in the XrdClientConn class? 3) How to set username and password for the used protocol then? I did not find any functions for that in XrdSec. Hope someone can help me. Cheers Joern