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Cassius 根据 CA / B Forum 的 《 Baseline Requirements Documents (SSL/TLS Server Certificates):
https://cabforum.org/wp-content/uploads/CA-Browser-Forum-BR-1.8.4.pdf 》之定义：
1.6.1 Definitions:
Authorized Ports: One of the following ports: 80 ( http), 443 ( https), 25 (smtp), 22 (ssh).
3.2.2.4.18 Agreed‑Upon Change to Website v2
Confirming the Applicant’s control over a FQDN by validating domain control of the FQDN using the ACME HTTP Challenge method defined in Section 8.3 of RFC 8555. The following are additive requirements to RFC 8555. The CA MUST receive a successful HTTP response from the request (meaning a 2xx HTTP status code must be received). The token (as defined in RFC 8555, Section 8.3) MUST NOT be used for more than 30 days from its creation. The CPS MAY specify a shorter validity period for Random Values, in which case the CA MUST follow its CPS.
If the CA follows redirects, the following apply:
1. Redirects MUST be initiated at the HTTP protocol layer.
a. For validations performed on or after July 1, 2021, redirects MUST be the result of a 301, 302, or 307 HTTP status code response, as defined in RFC 7231, Section 6.4, or a 308 HTTP status code response, as defined in RFC 7538, Section 3. Redirects MUST be to the final value of the Location HTTP response header, as defined in RFC 7231, Section 7.1.2.
b. For validations performed prior to July 1, 2021, redirects MUST be the result
of an HTTP status code result within the 3xx Redirection class of status codes, as defined in RFC 7231, Section 6.4. CAs SHOULD limit the accepted status codes and resource URLs to those defined within 1.a.
2. Redirects MUST be to resource URLs with either the “http” or “https” scheme.
3. Redirects MUST be to resource URLs accessed via Authorized Ports.
Note: * For Certificates issued prior to 2021‐12‐01, the CA MAY also issue Certificates for other FQDNs that end with all the labels of the validated FQDN. This method is suitable for validating Wildcard Domain Names. * For Certificates issued on or after 2021‐12‐01, the CA MUST NOT issue Certificates for other FQDNs that end with all the labels of the
validated FQDN unless the CA performs a separate validation for that FQDN using an authorized method. This method is NOT suitable for validating Wildcard Domain Names.
3.2.2.4.19 Agreed‑Upon Change to Website ‑ ACME
Confirming the Applicant’s control over a FQDN by validating domain control of the FQDN using the ACME HTTP Challenge method defined in Section 8.3 of RFC 8555. The following are additive requirements to RFC 8555.
The CA MUST receive a successful HTTP response from the request (meaning a 2xx HTTP status code must be received).
The token (as defined in RFC 8555, Section 8.3) MUST NOT be used for more than 30 days from its creation. The CPS MAY specify a shorter validity period for Random Values, in which case the CA MUST follow its CPS.
If the CA follows redirects, the following apply:
1. Redirects MUST be initiated at the HTTP protocol layer.
a. For validations performed on or after July 1, 2021, redirects MUST be the result of a 301, 302, or 307 HTTP status code response, as defined in RFC 7231, Section 6.4, or a 308 HTTP status code response, as defined in RFC 7538,
Section 3. Redirects MUST be to the final value of the Location HTTP response header, as defined in RFC 7231, Section 7.1.2.
b. For validations performed prior to July 1, 2021, redirects MUST be the result of an HTTP status code result within the 3xx Redirection class of status codes, as defined in RFC 7231, Section 6.4. CAs SHOULD limit the accepted status codes and resource URLs to those defined within 1.a.
2. Redirects MUST be to resource URLs with either the “http” or “https” scheme.
3. Redirects MUST be to resource URLs accessed via Authorized Ports.
Note: * For Certificates issued prior to 2021‐12‐01, the CA MAY also issue Certificates for other FQDNs that end with all the labels of the validated FQDN. This method is suitable for validating Wildcard Domain Names. * For Certificates issued on or after 2021‐12‐01, the CA MUST NOT issue Certificates for other FQDNs that end with all the labels of the validated FQDN unless the CA performs a separate validation for that FQDN using an authorized method. This method is NOT suitable for validating Wildcard Domain Names.
可以看到，HTTP 验证只能使用 80 端口。部分 CA 可以用 HTTPS （ 443 端口）、SMTP （ 25 端口）、SSH （ 22 端口，目前无 CA 支持）验证。
所以，IP 证书必须 80 端口验证，是他们做错了吗？
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