Looking for logging into the X11vnc Kein site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the X11vnc Kein site. After that you can login as usual with your login credentials.
https://askubuntu.com/questions/229989/how-to-setup-x11vnc-to-access-with-graphical-login-screen
https://forum.ubuntuusers.de/topic/x11vnc-richtig-einrichten/
https://www.elektronik-kompendium.de/sites/raspberry-pi/2011121.htm
https://debianforum.de/forum/viewtopic.php?t=155933
https://wiki.archlinux.org/index.php/x11vnc
https://linuxwiki.de/VNC
https://unix.stackexchange.com/questions/67497/x11vnc-how-to-have-the-login-screen
https://ubuntuforums.org/showthread.php?t=1897018
https://ubuntuforums.org/showthread.php?t=1114926
https://www.dannratemal.de/?p=685
http://manpages.ubuntu.com/manpages/xenial/man1/x11vnc.1.html
https://linuxconfig.org/how-to-share-your-desktop-in-linux-using-x11vnc
https://stackoverflow.com/questions/38616490/unable-to-launch-x11vnc-before-login-on-kubuntu-16-04