What is SNI (Server Name Indication)?

When you surf to a website on the Internet, a connection is made between your own PC and the server where the website is located. The data that these two computers exchange is sent over the internet without encryption. This means, that if a malicious person wants to know your login details, for example for your online banking, or for a website, he only needs to intercept these packets without encryption, after which he can see everything.

This is why SSL was created, which provides this data with encryption, so you can't just see what's in this data and can't get interesting passwords out of it. To activate SSL, you need an SSL certificate which we as DangerHost install for you completely free of charge on every hosting package.

To be able to install SSL, you used to need your own dedicated IP address. An SSL certificate could only run on a maximum of 1 unique IP address. Because all IP addresses in the world are almost gone, something new has been created, namely SNI: Server name indication. This technique has ensured that the limit of 1 SSL certificate per IP address is removed and we can now install SSL certificates without having to use new IPs.

What are the advantages and disadvantages of SNI?

The new technique called SNI has several advantages and disadvantages. Not all older browsers such as Internet Explorer 6.0 support SNI. This means that the website cannot be loaded over SSL. However, there is still very little use of these browsers and this disadvantage is less of a problem every day.

All new desktop and mobile browsers do support SNI. This allows us to make the Internet safer and more secure and ensure that no unpleasant things happen. Also, because we no longer need to reserve an IP address for each SSL certificate, many IPv4 IPs become available again. This has the advantage that we can continue to expand and provide new services on the free IP addresses. This saves you extra costs for an IP address which we have directly calculated into our prices.

 

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