Hi,
What version of Apache are you using? Are you using the mod_ssl too or no as you mentioned. I would recommend that you look at the
Apache Documentation for more help with Apache. I know that it is a lot of technical reading but there is some good information in there.
As for IIS 6.0, I don't know that much about it. I might recommend that you have a look at the
forum for 6.0. They might have some good information.
Cheers!