System.Net.WebClient不适用于Windows身份验证 [英] System.Net.WebClient doesn't work with Windows Authentication

问题描述

我正在尝试在WinForms应用程序中使用System.Net.WebClient将文件上传到IIS认证服务器，该服务器的Windows身份验证为
，它只是'身份验证'方法。

I am trying to use System.Net.WebClient in a WinForms application to upload a file to an IIS6 server which has Windows Authentication as it only 'Authentication' method.

WebClient myWebClient = new WebClient();
myWebClient.Credentials = new System.Net.NetworkCredential(@"boxname\peter", "mypassword"); 
byte[] responseArray = myWebClient.UploadFile("http://localhost/upload.aspx", fileName);

我得到'远程服务器返回错误：（401）未经授权'，实际上它是一个401.2

I get a 'The remote server returned an error: (401) Unauthorized', actually it is a 401.2

客户端和IIS都在同一台Windows Server 2003 Dev机器上。

Both client and IIS are on the same Windows Server 2003 Dev machine.

当我尝试打开时在Firefox中的页面输入与代码中相同的正确凭据，页面出现。
但是当使用IE8时，我得到相同的401.2错误。

When I try to open the page in Firefox and enter the same correct credentials as in the code, the page comes up. However when using IE8, I get the same 401.2 error.

尝试使用Chrome和Opera，它们都有效。

Tried Chrome and Opera and they both work.

我在IE Internet选项中启用了启用集成Windows身份验证。

I have 'Enable Integrated Windows Authentication' enabled in the IE Internet options.

安全事件日志具有失败审核：

The Security Event Log has a Failure Audit:

Logon Failure:
    Reason:     An error occurred during logon
    User Name:  peter
    Domain:     boxname
    Logon Type: 3
    Logon Process:  ÈùÄ
    Authentication Package: NTLM
    Workstation Name:   boxname
    Status code:    0xC000006D
    Substatus code: 0x0
    Caller User Name:   -
    Caller Domain:  -
    Caller Logon ID:    -
    Caller Process ID:  -
    Transited Services: -
    Source Network Address: 127.0.0.1
    Source Port:    1476

我使用Process Monitor和Fiddler进行调查但无济于事。

I used Process Monitor and Fiddler to investigate but to no avail.

为什么这会起作用第三方浏览器但没有使用IE或System.Net.WebClient？

Why would this work for 3rd party browsers but not with IE or System.Net.WebClient?

推荐答案

我见过类似的问题，其中Integrated /只有在按机器名或localhost访问主机时，NTLM安全性才有效。实际上，它是Windows中一个[不良]文档功能，旨在防止反射攻击。

I have seen a similar issue, where the Integrated / NTLM security will only work if you are accessing the host by machine name or localhost. In fact, it is a [poorly] document feature in Windows that is designed to protect against "reflection attacks".

基本上，您需要创建一个注册表项尝试访问服务器的计算机，并将您尝试访问的域列入白名单。每个主机名/ FQDN都需要在它自己的行上 - 没有通配符，名称必须完全匹配。来自KB文章：

Basically, you need to create a registry key on the machine that is trying to access the server, and whitelist the domain you are trying to hit. Each host name / FQDN needs to be on it's own line - there are no wildcards and the name must match exactly. From the KB Article:

• 单击开始，单击运行，键入regedit，然后单击确定。


• 在注册表编辑器中，找到并单击以下注册表项：
  HKEY_LOCAL_MACHINE \SYSTEM\CurrentControlSet \Control \Lsa \ MSV1_0


• 右键单击 MSV1_0 ，指向新建，然后单击多字符串值。


• 键入 BackConnectionHostNames ，然后按ENTER键。


• 右键单击 BackConnectionHostNames ，然后单击修改。


• 在数值数据框中，键入主机名或本地计算机上的站点的主机名，然后单击确定。


• 退出注册表编辑器，然后重新启动计算机。

• Click Start, click Run, type regedit, and then click OK.
• In Registry Editor, locate and then click the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\MSV1_0
• Right-click MSV1_0, point to New, and then click Multi-String Value.
• Type BackConnectionHostNames, and then press ENTER.
• Right-click BackConnectionHostNames, and then click Modify.
• In the Value data box, type the host name or the host names for the sites that are on the local computer, and then click OK.
• Exit Registry Editor, and then restart the computer.

http：// support。 microsoft.com/kb/956158/en-us

这篇关于System.Net.WebClient不适用于Windows身份验证的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！