Microsoft Edge does not allow localhost loopback for websockets

websocket loopback microsoft-edge
azaviruha picture azaviruha · Jul 21, 2015 · Viewed 20.2k times · Source

I have web-site and desktop application, and I want to connect them by websockets. So my web-site tries to connect to wss://localhost:8080, for example.

It works in IE11, but in "MS Edge" I have an error:

Cross zone request is not allowed

I have this problem on Win10 10240, so the flag "Allow localhost loopback" is enabled by default, and it did not help.

When I use CheckNetIsolation LoopbackExempt -a -n="Microsoft.MicrosoftEdge_8wekyb3d8bbwe" or this utility, all works as expected.

So, is this a case, that in new builds of "MS Edge" loopbacks are allowed for http, but not allowed for websockets? And if so, is it possible to make some workaround, and not to force my users to run some shell comand or to download externall utility?

Related question: Can't open localhost in Microsoft Edge (Project Spartan) in Windows 10 preview

Answer

Narcarsiss picture Narcarsiss · Jul 30, 2015

In the Microsoft Edge browser type "About:flags" in the title bar (search bar). No quotes, Tick/Un-tick the "allow Localhost Loopback" feature.

Edge on Win Build 10240. (still works upto New Edge (chrome based))

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