> 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/fr/portail-dadministration/acces-et-regles/rules/extensions-de-certificat.md).
# Extensions de certificat
Les extensions de certificat vous permettent d’enregistrer un champ contenu dans vos certificats afin qu’une règle puisse le lire directement, qu’il s’agisse d’un OID personnalisé privé émis par votre propre PKI, ou d’un champ standard tel que le sujet, le SAN ou un attribut de l’émetteur. Une fois enregistrée, l’extension apparaît comme une source dans les filtres Attribut de certificat ou les attributions dynamiques de toute règle.
{% hint style="info" %}
À l’heure actuelle, il n’est pas possible d’ajouter des extensions de certificat personnalisées aux profils SCEP dans de nombreux systèmes MDM, y compris Microsoft Intune et Jamf Pro.
Nous recommandons donc d’utiliser plutôt le nom du sujet du certificat pour [attribuer dynamiquement des VLAN](https://docs.radiusaas.com/admin-portal/settings/rules#vlan-assignment).
{% endhint %}
---
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