title: git clone error,Connection refused while accessing ... info/refs
body: <p>i want to clone resource from my git server through http,but i got the following error:</p>
  
  <pre><code>git clone http://xxx/ResMonitor.git/
  Cloning into ResMonitor...
  error: Failed connect to xxx:80; Connection refused while accessing
  http://xxx/ResMonitor.git/info/refs
  </code></pre>
  
  <p>i tried to run "git update-server-info" on the server , but it still doesn't work.
  (i can access <a href="http://xxx/ResMonitor.git/info/refs" rel="nofollow">http://xxx/ResMonitor.git/info/refs</a> through my chrome from client side)</p>
  
  <p>can any one help? many thanks!</p>