标题: UWP默认不允许访问127.0.0.1

创建: 2023-08-31 15:21
更新: 2023-08-31 15:59
链接: https://scz.617.cn/windows/202308311521.txt

参看

Using network loopback in side-loaded Windows Store apps - [2016-06-22]
https://learn.microsoft.com/en-us/previous-versions/windows/apps/dn640582(v=win.10)

从Win8开始，UWP默认不允许访问127.0.0.1；Edge算UWP，可用它实测之；这幺蛾子
我才知道。不过Win10好像已默认将Edge加入白名单，使得Edge可访问回环地址。系
统有个自带工具CheckNetIsolation.exe，可以管理这种白名单。

--------------------------------------------------------------------------
$ CheckNetIsolation /?

Usage:
   CheckNetIsolation [Module]
      List Of Modules:
          LoopbackExempt - controls the loopback exemption of AppContainers
                           and Package Families to ease application
                           development.
          Debug          - Starts a network traffic troubleshooting session
                           of an AppContainer or Package Family. Generates a
                           report of network capabilities that are used, not
                           used or missing, together with the network traffic
                           generated by the application.
          -?            -  Displays this help message.
--------------------------------------------------------------------------
$ CheckNetIsolation LoopbackExempt /?

Usage:
   CheckNetIsolation LoopbackExempt [operation] [-n=] [-p=]
      List of operations:
          -a  -  Add the AppContainer or Package Family to the loopback
                 exempted list.
          -d  -  Delete an AppContainer or Package Family from the
                 loopback exempted list.
          -c  -  Clear the list of loopback exempted AppContainers and
                 Package Families.
          -s  -  Show a list of loopback exempted AppContainers and
                 Package Families.

      List of arguments:
          -n= - AppContainer Name or Package Family Name.
          -p= - AppContainer or Package Family Security Identifier (SID).
          -?  - Displays this help message for the LoopbackExempt module.
--------------------------------------------------------------------------

查看白名单:

CheckNetIsolation LoopbackExempt -s

我的Win10白名单中已有Edge。假设有用Edge访问回环地址的需求，又不在白名单中，
可手工添加:

CheckNetIsolation LoopbackExempt -a -n=Microsoft.MicrosoftEdge_8wekyb3d8bbwe

如何知道"-n="的值呢？至少可用PowerShell:

Get-AppxPackage | Where-Object {$_.Name -like '*Edge*'} | Select PackageFamilyName

现在我知道下面这个设置在干啥了，就是加回环地址白名单:

Fiddler->Tools->Win8 Loopback Exemptions