Server Name Indication (SNI) is an extension to the TLS protocol that allows multiple SSL certificates to be hosted on a single IP address. This makes SSL more accessible and cost‑effective, especially as IPv4 addresses become scarce.
What Is SNI?
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Normally, each SSL certificate requires a dedicated IP address.
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With SNI, the client (browser) indicates the hostname it is connecting to during the SSL handshake.
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The server can then present the correct SSL certificate for that hostname.
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This allows multiple SSL‑enabled sites to share one IP address.
Ruachost Server SNI Support
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All Ruachost managed servers support SNI.
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You do not need to purchase a dedicated IP address to install an SSL certificate.
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This makes SSL deployment simpler and more affordable for shared hosting customers.
Browser SNI Support
Most modern operating systems and browsers support SNI. However, there are a few exceptions:
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❌ Not supported:
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Internet Explorer on Windows XP
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Safari on Windows XP
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BlackBerry OS 7.1 and earlier
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Windows Mobile 6.5 and earlier
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Android default browser on Android OS 2.x
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✅ Supported:
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All modern versions of Chrome, Firefox, Edge, Safari, and Opera
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Modern Android and iOS browsers
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Notes
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