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Multidomain or wildcard certificate

Multi-domain certificate
Certificate covering multiple specified domain names.

Typical areas of use are servers that handle services for several domain names. This simplifies administration and results in a lower cost per domain.

Wildcard certificate
Certificate covering an unlimited number of domain names at one level in the domain hierarchy.

Example: *.mydomain.com covers all domain names under mydomain.com.
For example: server1.mydomain.com, server2.mydomain.com, etc.

Combination of multi-domain and wildcard certificate
For advanced needs, we can combine multi and wildcard in one and the same certificate

multidomain-or-wildcard

You can include the domain names directly in the CSR: Enter one or more domain names when you generate the CSR.

Remember that wildcard certificates only cover domain names at one level in the domain hierarchy. The wildcard certificate *.mydomain.com will therefore not cover the subdomain on the fourth level, such as e.g. *sub.sub.mydomain.com. If you want to secure subdomains at different levels, you must include one wildcard per level.