反向位址查詢

Reverse Address Lookup

Confirming the Applicant’s control over the IP Address by obtaining an FQDN associated with the IP Address through a reverse-IP lookup on the IP Address and then using that FQDN as an ADN and performing validation using a method permitted under Section 3.2.2.4. Effective 2026-11-15, the ADN for this method MUST be exactly the FQDN returned from the reverse-IP lookup; the ADN selection algorithm in section 3.2.2.4 does not apply.

藉由對 IP 位址（IP Address）進行反向 IP 查詢以取得與該 IP 位址關聯的完全吻合網域名稱（Fully-Qualified Domain Name，FQDN），再將該 FQDN 作為經授權網域名稱（Authorization Domain Name，ADN），並使用第 3.2.2.4 節允許的方法進行驗證，以確認申請者（Applicant）對該 IP 位址的控管權。自 2026-11-15 起，此方法所使用的經授權網域名稱（ADN）應（MUST）與反向 IP 查詢所回傳的 FQDN 完全相同；第 3.2.2.4 節所述的選擇經授權網域名稱（ADN）的判斷流程不適用。

CAs performing validations using this method MUST implement Multi-Perspective Issuance Corroboration as specified in Section 3.2.2.9. To count as corroborating, a Network Perspective MUST observe the same FQDN as the Primary Network Perspective.

使用此方法進行驗證的憑證機構（Certification Authority，CA）應（MUST）實施第 3.2.2.9 節所規範之多視角簽發佐證（Multi-Perspective Issuance Corroboration）。若要算作有效佐證，其他網路視角（Network Perspective） 應（MUST）觀察到與主要網路視角（Primary Network Perspective）相同的 FQDN。

Effective March 15, 2027:

• The CA MUST NOT rely on this method.
• Prior validations using this method and validation data gathered according to this method MUST NOT be used to issue Subscriber Certificates.

自 2027-03-15 起：

• CA 不得（MUST NOT）依賴此方法。
• 先前使用此方法進行的驗證，以及依據此方法蒐集的驗證資料，不得（MUST NOT）用於簽發用戶憑證。