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How many levels does a Subject Alternative Name (SAN) wildcard replace?

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storagegrid
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sgrid
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Applies to

  • StorageGRID
  • S3 virtual-hosted-style requests

Answer

A single level.

Wildcard TLS/SSL certificates simplify subdomain management and reduce costs by using one certificate to secure a single domain and all related subdomains.

By using the asterisk symbol (*) as a placeholder (*.example.com), a wildcard certificate will automatically secure any subdomain at the same level.
 
If the wildcard Subject Alternative Name (SAN) is *.company.com:
 
This will work:  support.company.com or mybucket.company.com
 
This will not work: mybucket.support.company.com
 
Command : curl -v -X OPTIONS https://mybucket.support.company.com will result in an error such as:
 
SSL: no alternative certificate subject name matches target host name 'mybucket.support.company.com'
 
 
Note: A client such as Cyberduck will automatically switch from  virtual-hosted-style to path-style when the SSL connection fails using virtual hosted style.

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