> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/zh/active-directory/kerberos/kerberos-key-components.md).
# Kerberos 关键组件
#### KDC
该 **KDC**，或 **密钥分发中心**，安装在域控制器上。
它负责签发 Kerberos 票据。
它包含两个主要组件：
* **AS** ：身份验证服务；
* **TGS** ：票据授予服务。
#### AS — 身份验证服务
该 **AS** 是 KDC 中负责初始用户身份验证的部分。
当用户连接到域时发生。
#### TGS — 票据授予服务
该 **TGS** 是 KDC 中负责提供用于访问特定服务的票据的部分。
服务示例：
* SMB 共享；
* HTTP 服务；
* MSSQL；
* LDAP；
* CIFS；
* 内部应用程序服务。
#### krbtgt 账户
在 Active Directory 中，默认会创建一个特殊账户：
```
krbtgt
```
KDC 使用此账户对某些 Kerberos 票据进行签名和加密。
它极其敏感，因为它与域中 Kerberos 身份验证的工作方式有关。
---
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