> For the complete documentation index, see [llms.txt](https://docs.radiusaas.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.radiusaas.com/ja/ptaru/akusesutorru/rules/zheng-ming-shu-kuo-zhang.md).

# 証明書拡張

<figure><img src="https://992520889-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSWU1DQ4UGkqER7uGNUOm%2Fuploads%2FFXR9ws4bhGIDgPOjlkCj%2Fimage.png?alt=media&amp;token=eb7ecb0a-4fb0-4459-ae80-6b114b44dd6b" alt=""><figcaption></figcaption></figure>

証明書拡張を使用すると、証明書に含まれるフィールドを登録できるため、ルールがそれを直接読み取れるようになります。これは、自社の PKI が発行するプライベートなカスタム OID でも、サブジェクト、SAN、発行者属性などの標準フィールドでも構いません。登録すると、その拡張は、任意のルールの証明書属性フィルターまたは動的割り当てにおけるソースとして表示されます。

{% hint style="info" %}
現在、Microsoft Intune や Jamf Pro を含む多くの MDM システムでは、SCEP プロファイルにカスタム証明書拡張を追加することはサポートされていません。

そのため、代わりに証明書のサブジェクト名を使用して [VLAN を動的に割り当てることを推奨します](https://docs.radiusaas.com/admin-portal/settings/rules#vlan-assignment).
{% endhint %}


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