Knowledgebase: SSL Technical FAQs

Can a Single SSL Server Certificate Cover Multiple Ports Per Domain Name?

Yes, a single SSL server certificate can cover multiple ports for the same domain name. As an example, the certificate for will work for:

  •; and

  • A specific port number should not be specified in the CN (Common Name) field. If a port number is included as part of the CN (Common Name) then our system will not accept the Certificate Signing Request (CSR) as valid.

    The error our system would produce is:

    The Common Name may only contain the following characters:
    A .. Z   a .. z   0 .. 9   .   -   <SPACE>

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