windows 可以上网,显示无网络连接

连接状态检测原理

复制从:https://superuser.com/questions/277923/how-does-windows-know-whether-it-has-internet-access-or-if-a-wi-fi-connection-re

Here are the details of the connection status determination process:

The following list describes how NCSI might communicate with a Web site to determine whether a network has Internet connectivity:

1. A request for DNS name resolution of dns.msftncsi.com

2. A HTTP request for http://www.msftncsi.com/ncsi.txt returning 200 OK and the text Microsoft NCSI

This can be disabled with a registry setting. If you set

 HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServices
     NlaSvcParametersInternetEnableActiveProbing

to 0, Windows will no longer probe for internet connectivity.

Apple does something very similar in iOS to detect internet connectivity and possible hotel "login" wifi pages, etc.

解决办法:

计算机HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesNlaSvcParametersInternetEnableActiveProbing 改为0  禁用检测

##############################################################20210706

上面的不起作用 

计算机HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesNlaSvcParametersInternetEnableActiveProbing 改为1

参考 :https://docs.microsoft.com/en-us/answers/questions/122033/win-10-version-2004-no-internet-connection-but-can.html

The following registry entries worked for me immediately, and retain after multiple reboots. Even if there are no values present under the NetworkConnectivityStatusIndicator Key, add the one shown below and see if it helps.

Key: HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesNlaSvcParametersInternet
Type: DWORD
Value: EnableActiveProbing
Data: 1

Key: HKLMSoftwarePoliciesMicrosoftWindowsNetworkConnectivityStatusIndicator
Type: DWORD
Value: NoActiveProbe
Data: 0

If issues persist, I recommend wiping and reloading the OS w/ 2004 or 20H2 (whichever is your preference). An In-Place Upgrade will not resolve this issue.