Subdomains don't support SNI

SNI, or Server Name Indication, is a key component of secure website hosting. If your website’s subdomains don’t support SNI, this could mean that your site lacks an essential layer of security, potentially turning visitors away.

What is SNI?

SNI helps identify the specific domain name on a server hosting multiple websites. Think of it as addressing an apartment within a building rather than a standalone house. This ensures that browsers correctly locate your website files and initiate a secure connection.

Why SNI Matters for SEO

Google prioritizes secure websites, and without SNI, visitors may receive warnings about your site’s security, which affects both SEO rankings and visitor trust. If you receive an SNI error on your Semrush audit, it’s a sign that your hosting setup may lack essential security protocols.

How to Fix SNI Issues

To resolve SNI issues, contact your website host. On premium platforms like Squarespace and Wix, this problem rarely occurs, but with some WordPress hosts, especially budget ones, SNI support can be unreliable. High-quality hosts like SiteGround are recommended for users who want to avoid such issues.

Final Thoughts on SNI and Your Website’s Security

Maintaining SNI is crucial for user trust and SEO. By ensuring SNI support, you provide a secure, reliable experience for visitors, improving both security and search engine rankings.