it is - allegedly - a design intention that you only have one secure domain per IP address, and thus mod-rewrite can't work as at the point the instruction is reached the domain name isn't actually known! Me, I run my own servers and want to try and find a way around it other than using multiple ports (one per secure site but people need to know in advance) or a structure which use Alias to put each in a separate directory (which would be accessible by "../" etc so not secure really)