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Wildcard SSL Certificates

A wildcard certificate is an SSL certificate which can be used with multiple subdomains of a domain. Depending on the number of subdomains this saves money and also could be more convenient than managing individual SSL certificates for each of the subdomains in a domain.

Limitations

  1. Only a single level of subdomain matching is supported.
  2. It is not possible to get an Extended Validation wildcard SSL certificate.
  3. The base domain is not valid and must be added separately as a SubjectAltName.

Benefits

Wildcards can be added as domains in Subject Alternative Name (SAN) certificates and in Unified Communications Certificates (UCC). In addition, wildcards themselves can have subjectAltName extensions, including other wildcards. e.g., If the wildcard certificate *.example.org has *.m.example.org as an Subject Alternative Name it secures https://www.example.org as well as the completely different website name https://meta.m.example.org

Example

In the case of a wildcard certificate for *.example.com, these domains would be valid:

  • payment.example.com
  • contact.example.com
  • login-secure.example.com
  • www.example.com

Because the wildcard only covers one level of subdomains (the asterisk doesn’t match full stops), these domains would not be valid for the certificate:

  • test.login.example.com

The base domain is also not valid and must be added separately as a SubjectAltName:

  • example.com


ProductValidationDeliveryEncryption StrengthSite SealWildcardAdd'l DomainsGreen AddressbarWarrantySecurity Scan
Comodo EssentialSSL WildcardDomain3 minutes128/256-bityesyesUnlimitedno$10,000yes
Comodo Multi-Domain Wildcard SSLDomain5 minutes128/256-bitnoyes3non/ayes
Comodo PositiveSSL WildcardDomain3 minutes128/256-bityesyesUnlimitedno$10,000yes
Comodo Premium SSL WildcardOrganization1-2 days128/256-bityesyesUnlimitedno$250,000yes
Comodo SGC SSL WildcardOrganization1-2 days128/256-bityesyesUnlimitedno$250,000yes
GeoTrust True BusinessID WildcardOrganization2-3 days256-bityesyesUnlimitedno$10,000no
RapidSSL Wildcard CertificateDomain3 minutes256-bityesyesUnlimitedno$5,000no
Symantec Secure Site WildcardOrganization2-3 Days40/256-bityesyesUnlimitedno$500,000yes
Thawte Wildcard SSL CertificateOrganization2-3 days256-bityesyesUnlimitedno$125,000no


Product1 Year2 Years3 Years4 Years5 YearsAdd'l Domains 
Comodo EssentialSSL Wildcard$78.66$137.42$196.19$254.95$309.59Order Now
Comodo Multi-Domain Wildcard SSL$124.02$216.80$309.59$35.36Order Now
Comodo PositiveSSL Wildcard$72.47$126.08$180.72$234.33$299.28Order Now
Comodo Premium SSL Wildcard$124.02$216.80$309.59$402.37$495.15Order Now
Comodo SGC SSL Wildcard$227.11$397.22$567.32$737.42$941.55Order Now
GeoTrust True BusinessID Wildcard$319.90$559.07$799.28$1,038.45Order Now
RapidSSL Wildcard Certificate$90.00$157.01$224.02$291.03Order Now
Symantec Secure Site Wildcard$1,701.34$2,976.60$4,252.89Order Now
Thawte Wildcard SSL Certificate$273.51$477.63Order Now

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