On the Web Site property sheet in IIS, click the Advanced button.
On the Advanced Multiple Web Site Config property sheet, click the Edit button
to assign a host header name, IP address, and port for a Web site. This will
need to be done for each of the virtual servers that will belong to this IP
address. Also, with frontpage, you will have to type the domain name and not
the IP address to list webs at this domain when using fp explorer. Very
important that DNS is set up properly for this to work.
Note Because the domain name is specified in an SSL certificate, when using an
SSL certificate, you can assign only one host header name to an IP address.
However, you can have multiple IP addresses, and multiple SSL ports, per Web
site.