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Domain prevalidation: Revalidate your domain before validation expires

証明書の即時的な発行のためにドメインの検証を最新状態に維持します

シームレスな証明書発行を維持するためにも、ドメインの検証有効期限が切れるのを待たずに、ドメイン名の利用権確認（DCV）を完了してドメインを再検証するようにしてください。

Don’t wait until your domain's validation expires to revalidate it. With CertCentral, you can revalidate a domain at any time. This domain management feature enables you to complete the domain's validation early, so your immediate certificate issuance process continues without interruption.

Items to note about domain validation:

  • Per industry standards, a domain's validation is valid for 199 days (approximately 6 months).

  • If you order a certificate while the domain's revalidation is pending, we use the domain's current validation to issue the certificate if it is still valid.

Submit domain for revalidation

  1. CertCentralアカウントの左側にあるメインメニューで、［証明書］＞［ドメイン］の順に進みます。

    • For Enterprise and Partner accounts: go to Certificates > Domains.

    • For CertCentral Subscription accounts: go to Validation > Domains.

  2. ［ドメイン］ページで、再検証するドメインの［ドメイン名］をクリックします。

  3. ［ドメイン名の利用権確認（DCV）方式］セクションで、ドメインに対する利用権を証明するために使用する方式を選択します。

    • 申請承認メール

      Go to your DNS provider and create a TXT record. Add a DigiCert-generated random value to the domain's TXT record. DigiCert does a search for a DNS TXT record associated with the domain that includes the DigiCert-generated random value.

    • DNS TXTレコード

      An email recipient follows the instructions in a confirmation email sent for the domain. DigiCert sends two sets of DCV emails: Email to DNS TXT contact and Constructed Email.

      • Email to DNS TXT contact

        Place the DNS TXT record on the _validation-contactemail subdomain of the domain you want to validate. The RDATA value of this text record must be a valid email address.

        DigiCert sends an authorization email to the email addresses found in the DNS TXT record on the _validation-contactemail subdomain of the domain you are validating.

      • Email to Constructed Email

        DigiCert sends the authorization email to five constructed email addresses for the domain: admin, administrator, webmaster, hostmaster, and postmaster @[domain_name].

        Before DigiCert can successfully send an authentication DCV email to the domain owner (or domain controller), we must verify that an MX record (a resource record in the Domain Name System [DNS]) exists in the DNS records of the recipient's domain name. The presence of valid MX records enables us to send the authentication email.

      警告

      End of life for the WHOIS-based Email

      On May 8, 2025, DigiCert ended support for the WHOIS-based domain control validation method (DCV) email method. DigiCert systems have stopped querying WHOIS entirely to find email addresses for domain validations. To learn more about this change, see our knowledge base article, End of life for WHOIS-based DCV methods.

      What should I do?

      Update your domain validation process to use one of the other supported DCV methods. To continue using the Email DCV method, use the DNS TXT record email contacts or the Constructed email method.

    • DNS CNAMEレコード

      Go to your DNS provider and create a CNAME record. In the hostname field, enter _dnsauth. Then, add [random_value].dcv.digicert.com in the target host field to point the CNAME record to dcv.digicert.com. DigiCert does a search for a DNS CNAME record associated with the domain that includes the DigiCert-generated random value.

    • ファイル認証

      You can only use the HTTP Practical Demonstration DCV methods to demonstrate control over fully qualified domain names (FQDNs) exactly as named. To learn more, visit Domain Validation Policy Changes.

      • HTTP Practical Demonstration

        Host a file containing a DigiCert-generated random value at a predetermined location on your website: http://{domain-name}/.well-known/pki-validation/fileauth.txt. DigiCert visits the specified URL to confirm the presence of our random value.

      • HTTP Practical Demonstration with unique filename

        Host a file with a random, DigiCert-generated filename that contains a DigiCert-generated random value at a predetermined location on your website: http://{domain-name}/.well-known/pki-validation/{unique-filename}.txt. DigiCert visits the specified URL to confirm the presence of our random value.

  4. ［認証を申請］をクリックします。

What's next

選択したDCV方式を使用してドメイン検証を完了し、ドメインに対する利用権を証明します。詳細については、「ドメインの事前検証： 「ドメイン名の利用権確認（DCV）方式」を参照してください。ドメインの事前検証にサポートされるドメイン名の利用権確認（DCV）方式

References:

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