web analytics
en English
X

Select Language

Powered by Google TranslateTranslate

We hope you will find the Google translation service helpful, but we don’t promise that Google’s translation will be accurate or complete. You should not rely on Google’s translation. English is the official language of our site.

en English
X

Select Language

Powered by Google TranslateTranslate

We hope you will find the Google translation service helpful, but we don’t promise that Google’s translation will be accurate or complete. You should not rely on Google’s translation. English is the official language of our site.

What is the Common Name?

Before you can enroll for an SSL Server Certificate, you must generate a Certificate Signing Request (CSR) from your web server software. During the creation of the CSR, the following fields must be entered: Organization (O), Organizational Unit (OU), Country (C), State (S), Locality (L), and Common Name (CN). The Common Name field is often misunderstood and filled out incorrectly.

The Common Name is typically composed of Host + Domain Name and will look like www.yoursite.com or yoursite.com. SSL Server Certificates are specific to the Common Name that they have been issued to at the Host level.

The Common Name must be the same as the Web address you will be accessing when connecting to a secure site. For example, an SSL Server Certificate for the domain domain.com will receive a browser warning if accessing a site named www.domain.com or secure.domain.com, as www.domain.com and secure.domain.com are different from domain.com. You would need to create a CSR for the correct Common Name.

Note: For examples of browser error messages resulting from an incorrect common name, please see this article.

When a Certificate will be used on an Intranet (or internal network), the Common Name may be one word, and it can also be the name of the server.

Thank you for choosing SSL.com! If you have any questions, please contact us by email at Support@SSL.com, call 1-877-SSL-SECURE, or just click the chat link at the bottom right of this page. You can also find answers to many common support questions in our knowledgebase.

Subscribe to SSL.com’s Newsletter

Don’t miss new articles and updates from SSL.com