Does Google CA accept IP addresses as SubjectAltNames and how can I go about this?

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How can I use an IP address instead of a domain in a subject alt name and how can I get this approved by Google Certificate Authority?

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John Hanley On

No, you cannot use IP addresses for one of SAN entries with Google Certificate Authority Service.

[Update 2023-06-29]

Google Trust Services will issue TLS certificates that contain an IP address instead of a domain name in the certificate subject field.

However, the lifetime of the certificate is only 10 days.

This FAQ has more details.