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Wildcard SSL - Do I need another SSL for subsubdomain.subdomain.domain.com?

I'm not sure if I can say it right. I know that Wildcards SSL cards will support any number of subdomains in a domain. But does it also support subdomains of existing subdomains?

I'm going to buy a wildcard SSL code, but I need to have this setup: subsubdomain.subdomain.domain.com

Do I need more certificates or will just one wildcard certificate suffice?

Thanks.

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1 answer

Wildcards can support subdomains of existing subdomains, but there are different criteria for protecting your domain and subdomains and multi-level subdomains.

First: If you only need to protect your * .subdomain.domain.com

In this case, you can protect your subdomains with a single SSL wildcard. CSR needs to be generated on subdomain.domain.com - Wildcard SSL will work only with this condition.

The caveat for choosing a ssl wildcard to protect your tiered subdomain does not apply to your top level domain. If someone tries to access your https://domain.com , they will find a domain name mismatch error in a web browser.

Second: If you want to protect your entire site.

Including all of the following:

domain.com (top level domain) *.domain.com (sub domain) *.*.domain.com (sub sub domain)

You need to protect your entire site with a single UCC / SAN certificate. This helps you protect all of the above conditional web pages using a Subject Alternative Name (SAN) certificate.

I hope you now understand what to do. Know your business and choose a certificate.

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Source: https://habr.com/ru/post/1498803/

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