title: Changing port in launchSettings.json gives "This site can’t be reached"
body: <p>I created an empty asp.net core app using VS2017. Only thing I changed is the  <code>"sslPort":</code> property in the launchSettings.json file.
  When I click run IIS Express chrome opens with url <code>https://localhost:9995/</code> and gives the <code>This site can't be reached The connection was reset.</code> error</p>
  
  <p>My launchSettings.json is the following</p>
  
  <pre><code>{
    "iisSettings": {
      "windowsAuthentication": false, 
      "anonymousAuthentication": true, 
      "iisExpress": {
        "applicationUrl": "http://localhost:39566",
        "sslPort": 9995
      }
    },
    "profiles": {
      "IIS Express": {
        "commandName": "IISExpress",
        "launchBrowser": true,
        "environmentVariables": {
          "ASPNETCORE_ENVIRONMENT": "Development"
        }
      },
      "JccWeb2": {
        "commandName": "Project",
        "launchBrowser": true,
        "applicationUrl": "https://localhost:5001;http://localhost:5000",
        "environmentVariables": {
          "ASPNETCORE_ENVIRONMENT": "Development"
        }
      }
    }
  }
  </code></pre>
  
  <p>What am I doing wrong?</p>