title: SignalR falls back to long polling on port 80
body: <p>Does anyone have an idea why on a deployment server(Windows 2008 R2 64bit, IIS7.5) SignalR(1.0.0.0 rc1) would fall back to long polling on port 80 but use SSE if the site is configured on a different port?</p>
  
  <p>I don't touch the software - just change the bindings of the site to port 8081 and watch the client logs.</p>
  
  <p>Port 80:</p>
  
  <pre><code>    [19:28:15 GMT+0200 (FLE Standard Time)] SignalR: Negotiating with '/signalr/negotiate'. jquery.signalR-1.0.0-rc1.min.js:10
  [19:28:15 GMT+0200 (FLE Standard Time)] SignalR: Attempting to connect to SSE endpoint 'http://192.168.10.91/signalr/connect?transport=serverSentEvents&amp;connectionId=0e082fb2-d94d-4907-9579-b4ccde10816d&amp;connectionData=%5B%7B%22name%22%3A%22onair%22%7D%5D&amp;tid=8' jquery.signalR-1.0.0-rc1.min.js:10
  [19:28:18 GMT+0200 (FLE Standard Time)] SignalR: EventSource timed out trying to connect jquery.signalR-1.0.0-rc1.min.js:10
  [19:28:18 GMT+0200 (FLE Standard Time)] SignalR: EventSource readyState: 0 jquery.signalR-1.0.0-rc1.min.js:10
  [19:28:18 GMT+0200 (FLE Standard Time)] SignalR: EventSource calling close() jquery.signalR-1.0.0-rc1.min.js:10
  [19:28:18 GMT+0200 (FLE Standard Time)] SignalR: This browser supports SSE, skipping Forever Frame. jquery.signalR-1.0.0-rc1.min.js:10
  4
  Object {Name: "WindowMain", Dock: 2, EleID: "mainContainer", Children: Array[5]}
   jquery.layoutengine.js:52
  [19:28:18 GMT+0200 (FLE Standard Time)] SignalR: Attempting to connect to 'http://192.168.10.91/signalr/connect?transport=longPolling&amp;connectionId=0e082fb2-d94d-4907-9579-b4ccde10816d&amp;connectionData=%5B%7B%22name%22%3A%22onair%22%7D%5D&amp;tid=8' using longPolling. 
  </code></pre>
  
  <p>port 8081</p>
  
  <pre><code>[19:28:04 GMT+0200 (FLE Standard Time)] SignalR: Negotiating with '/signalr/negotiate'. jquery.signalR-1.0.0-alpha2.min.js:10
  [19:28:04 GMT+0200 (FLE Standard Time)] SignalR: Attempting to connect to SSE endpoint 'http://192.168.10.91:8081/signalr/connect?transport=serverSentEvents&amp;connectionId=08b410ad-7be1-4a94-be02-c713df035c98&amp;connectionData=%5B%7B%22name%22%3A%22onair%22%7D%5D&amp;tid=9' jquery.signalR-1.0.0-alpha2.min.js:10
  [19:28:04 GMT+0200 (FLE Standard Time)] SignalR: EventSource connected jquery.signalR-1.0.0-alpha2.min.js:10
  [19:28:04 GMT+0200 (FLE Standard Time)] SignalR: Now monitoring keep alive with a warning timeout of 40000 and a connection lost timeout of 60000 jquery.signalR-1.0.0-alpha2.min.js:10
  </code></pre>