Sometimes I notice that my laptop mentions "No internet connection" (wired/wireless) when I am working on internet. Windows checks automatically for IP/DNS and responses from http://www.msftncsi.com for both IPV4 and IPV6. Source: http://answers.microsoft.com/en-us/windo...e=2&auth=1 The exact list what Windows checks, can be found in the registry: [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\NlaSvc\Parameters\Internet] Solution: I had to add www.msftncsi.com to the webfilter white list to solve this problem. If you want to change the default diagnostics (now: itusnetworks.com), edit the file /usr/lib/lua/luci/view/admin_network/diagnostics.htm