Fedora7: remote desktop

Gnome Windows Environment
System--Preferences--Internet and Network --Remote Desktop

After the "Ask you for confirmation" is unchecked, I could connect the Fedora from Windows 2003 by VNC Viewer without password.

KDE krfb Desktop Sharing

System Tools --krfb Desktop SharingClick on Configure... button

Uncheck "Confirm uninvited connections before accepting
Check "Allow uninvited connections to control the desktop"

By vncviewer downloaded from http://www.realvnc.com, I could connect to my Fedora without authentication.