How can I host multiple sites on a single IP address?
Overview
Plesk 10.3 supports the Server Name Indication (SNI) extension to the Transport Layer Security protocol, which makes it possible to use authentic SSL certificates for sites hosted on shared IP addresses.
Benefits
SNI helps to efficiently use IPv4 resources and provides the following benefits:
- You can run any number of SSL sites with independent certificates on a single IPv4 address.
- You can install independent SSL certificates on each of your sites. Now, there is no need to create another subscription. Each subscription can install an SSL certificate even if there is only one shared IP address on the whole server.
Requirements
SSL support with SNI on shared IP addresses requires that users' browsers also support SNI. Most modern web browsers, such as IE 7, Firefox 2.0, Opera 8.0, and Chrome support it, unless they are run on Windows XP. To learn more about SNI and client software that supports it, refer to http://en.wikipedia.org/wiki/Server_Name_Indication.
NOTE:
In cases when SNI is not supported, assigning an SSL certificate to a site hosted on a shared IP address will associate that certificate with all other sites hosted on the same IP address.
See also
For instructions on assigning SSL certificates to websites, please see: Installing an SSL Certificate.