We're almost ready to issue certificates for IP address SANs from Let's Encrypt's production environment. They'll only be available under the shortlived profile (which has a 6-day validity period), and that profile will remain allowlist-only for a while. Please note: We have more work to do before …

Getting ready to issue IP address certificates

griffin June 24, 2025, 11:31pm 3

It should be an IP SAN type. This would be IP.# in OpenSSL, not DNS.#.

A related post:

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