What is a Wildcard SSL certificate?
A Wildcard SSL certificate secures your website URL, and an unlimited number of its subdomains. A single Wildcard certificate can secure both www.coolexample.com, and blog.coolexample.com.
Wildcard certificates secure all of the subdomains at the level you specify when you submit your request. Just add an asterisk (*) in the subdomain area of the common name where you want to specify the wildcard. For example:
If you configure *.coolexample.com, you can secure
If you configure *.www.coolexample.com, you can secure
Wildcard certificates secure websites the same as a regular SSL certificate, and requests are processed using the same validation methods. However, some Web servers might require a unique IP address for each subdomain on the Wildcard certificate.
NOTE: A Wildcard certificate secures only the level of subdomain you specify. So, if a certificate is configured for *.www.coolexample.com, it will not secure www.coolexample.com.
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