无法托管WebSocket服务器-握手期间出错

Question

I want to try a WebSockets and I found this artcile on the internet Using WebSocket in .NET I am sure that I did every step properly, I enabled WebSockets in IIS, I wrote all clases which are mention in article, I register HTTP Handler in web.config etc.. but when I want to try it I still get exception:

WebSocket connection to 'ws://localhost/CodeProjectWeb/WSHandler.ashx' failed: Error during WebSocket handshake: Unexpected response code: 404

I know that 404 probably means that URL is wrong, but how can be wrong? Some additional info: I am running on windows 10, IIS 10.0 Express, .NET 4.6, Visual Studio 2013, I tried it on Google Chrome, Firefox (both last versions). To be honest, this is not first tutorial which I tried. I already tried antoher 3-4 articles about WebSocket in .NET, also I tried use SignalR but still with the same results. I just dont know, I think that I am missing some important little thing..

If you need some more information just ask but I hope I write everything

Answer 1

I finally figure it out (probably). I have to turn off Windows Firewall to make it work. So if you have similar problem just be sure that your Firewall is turn off.