3.4.2. 代理提供者
代理供应商充当 SSSD 资源的中介程序，无法直接访问。SSSD 连接到代理服务来加载外部库，实现与传统系统（如 NIS 和替代验证硬件）的集成。
您可以将 SSSD 配置为使用代理提供商来启用：
- 其他验证方法，如指纹扫描仪
- 传统系统，如 NIS
-
在
/etc/passwd文件中定义的本地系统帐户作为身份提供程序和远程身份验证提供程序，如 Kerberos - 使用智能卡验证本地用户
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