How to install an SSL certificate on IIS if one IP is used for several domains?

Question

IIS

Good day,
There is 1 static IP address + Windows Server 2008 on which IIS 7.0 is installed. Raised two sites website1.com and website2.com. In Site binding, the host name field contains the required domain for each of the sites.
There is also a regular SSL certificate for website1.com. The problem is that when you select a certificate in the Site binding, the host name field is empty, it cannot be changed, and when you try to access the site https://website1.com , it says "The web page is not available".
Is it possible to install a regular certificate only on the website1.com domain in this case? If it is possible, then how to implement it?

Answer 1

It is possible to install one certificate for several sites, but all sites that are not listed in the certificates will not pass the certificate verification in the browser.
Installing different certificates on the same port of the same address is impossible because the encryption protocol is initialized before the HTTP protocol and the server does not know the address of the requested site before the connection is established.
You can install different certificates on different ports on the same address, but then the ports of all sites except the first one will have to be made non-standard (not 443).
If you don't need HTTPS on the second site, just unbinding it in the site's settings.