# External Authentication (QUX)

{% content-ref url="external-authentication-qux/radius-qux" %}
[radius-qux](https://docs.vectra.ai/configuration/access/external-authentication-qux/radius-qux)
{% endcontent-ref %}

{% content-ref url="external-authentication-qux/ldap-qux" %}
[ldap-qux](https://docs.vectra.ai/configuration/access/external-authentication-qux/ldap-qux)
{% endcontent-ref %}

{% content-ref url="external-authentication-qux/tacacs-qux" %}
[tacacs-qux](https://docs.vectra.ai/configuration/access/external-authentication-qux/tacacs-qux)
{% endcontent-ref %}