Experiencing with my new VPS server I decided to have a real SSL certificate, so requested one from StartSSL for free and followed this two guides to install on lighttpd:
https://forum.startcom.org/viewtopic.php?t=719
http://redmine.lighttpd.net/projects/lighttpd/wiki/Docs_SSL
https://forum.startcom.org/viewtopic.php?t=719
http://redmine.lighttpd.net/projects/lighttpd/wiki/Docs_SSL