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What is the difference between a multi-domain SSL certificate and a wildcard server certificate?

SSL certificates are divided into several types of certificates according to their encryption levels. Different users can choose different certificates according to the requirements of their own websites. What is a multi-domain SSL certificate? What is a wildcard server certificate and what is the difference between the two?

Multi-domain SSL certificate

Multi-domain SSL certificate means that multiple completely different website domain names can be bound in a SSL certificate, not in sub-domains, because generally there are multiple domain names in an organization and multiple different domain names on a virtual host.

Wildcard server certificate

The wildcard server certificate supports * .domain.com, that is, all secondary domain names under the same domain name are supported. For example, if the primary domain name bound by the wildcard certificate is www.zzidc.com, the system supports binding all secondary domain names under zzidc.com by default.

What is the difference between a multi-domain SSL certificate and a wildcard server certificate?

Generally speaking, a SSL certificate is bound to a domain name, a SSL certificate corresponds to a domain name, and a Web server's SSL encryption requires a separate port (the default SSL port is 443). Currently, on a physical server (only 1 IP address), if you want to use SSL for multiple sites, only one site can use port 443.

Multi-domain SSL certificates support multiple different domain names. Unlike wildcard SSL certificates, wildcard SSL certificates support * .SSL, that is, all second-level domain names under the same domain name are supported, while multi-domain certificates are for any domain name, not second-level domain names.

The above is about the difference between multi-domain SSL certificate and wildcard server certificate. For the choice between SSL certificate and wildcard server certificate, users who need to deploy SSL certificate can choose one or both of them according to their website needs.

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