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Before a transport layer security (TLS) extension called Server Name Indication (SNI) was published, secure sockets layer (SSL) certificates were limited to organization validation (OV) SSL certificates that secured an IP address. For a website to use SSL, it needed a dedicated IP. Today, that couldn’t be further from the truth.
For example, SNI can be used to secure multiple Apache sites using a single SSL certificate, or multiple SSL certificates can be used to secure sites on a single domain using just one IP address. What’s the benefit of doing this? Since you’re on this page, we assume you already know. However, in case you don’t, we’ll briefly summarize: You can secure more sites without needing to purchase additional SSL certificates, hardware, or IP addresses.
This article will briefly explain how to set up multiple SSL certificates for multiple websites that share the same IP address. This approach is common in shared hosting environments.
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