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サイトを追加する

Cloudflareにサイトを追加するには、Cloudflare内に新しいドメインを作成し、そのドメインを有効にするための追加の手順を実行する必要があります。

前提条件

Cloudflareを使用するには、ドメイン（example.com）を所有している必要があります。

まだドメイン名を所有しておらず、Cloudflareを権威DNSに使用する予定の場合は、Cloudflare Registrarを通じてドメイン名を購入することを強くお勧めします。

Cloudflare Registrarを使用すると、権威DNSにCloudflareを自動的に使用することで、セットアッププロセスが簡素化されます。

If you are onboarding an existing domain to Cloudflare, make sure DNSSEC is disabled at your registrar (where you purchased your domain name). Otherwise, your domain will experience connectivity errors when you change your nameservers.

Provider-specific instructions

This is not an exhaustive list of how to update DS records in other providers, but the following links may be helpful:

Why you have to disable DNSSEC

When your domain has DNSSEC enabled ↗, your DNS provider digitally signs all your DNS records. This action prevents anyone else from issuing false DNS records on your behalf and redirecting traffic intended for your domain.

However, having a single set of signed records also prevents Cloudflare from issuing new DNS records on your behalf (which is part of using Cloudflare for your authoritative nameservers). So if you change your nameservers without disabling DNSSEC, DNSSEC will prevent Cloudflare’s DNS records from resolving properly.

1. Cloudflareにサイトを追加する

  1. Log in to the Cloudflare dashboard ↗.

  2. In the top navigation bar, select Add site.

  3. Enter your website’s apex domain (example.com) and then select Continue.

  4. Select your plan level. For more details on features and pricing, refer to our Plans page ↗.

  5. Review your DNS records.

    When you add a new site to Cloudflare, Cloudflare automatically scans for common records and adds them to the DNS zone. The records show up under the respective zone DNS > Records page.


    1. Since this scan is not guaranteed to find all existing DNS records, you need to review your records, paying special attention to the following record types:

    2. If you find any missing records, manually add those records.

    3. Depending on your site setup, you may want to adjust the proxy status for certain A, AAAA, or CNAME records.

    4. Select Continue.

2. ネームサーバーを更新する

Once you have added a domain (also known as a zone) to Cloudflare, that domain will receive two assigned authoritative nameservers.


Before your domain can begin using Cloudflare for DNS resolution, you need to add these nameservers at your registrar. Make sure DNSSEC is disabled at this point.

3. SSL/TLSのセットアップを完了する

安全でない接続や訪問者のブラウザエラーを防ぐために、SSL/TLS保護を確保し、セキュリティを向上させるためにクイックスタートガイドを通過してください。

4. 基本を超える

Cloudflareアカウントを最大限に活用するための提案やガイダンスについては、基本的なタスクを参照してください。

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