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 397 days (approximately 13 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.
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。
[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。
[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 can send three sets of DCV emails: Email to DNS TXT contact, Constructed Email, and WHOIS-based.
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.
Email to WHOIS
For WHOIS-based email, DigiCert sends an authorization email to the registered owners of the public domain as shown in the domain's WHOIS record.
警告
End of life for the WHOIS-based Email method
On May 8, 2025, DigiCert will end support for the WHOIS-based DCV email method. DigiCert systems will stop querying WHOIS entirely to find email addresses for domain validations.
If you still want to use the Email DCV method, use the DNS TXT record email contact or the Constructed email method.
To learn more about the end of life for WHOIS-based email, see our knowledge base article, End of life for WHOIS-based DCV methods.
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.
[認証を申請]をクリックします。
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。
References: