title: not able to open port in googlecloud
body: <p>i am configuring voip server on centos 7 (google cloude) but some ports are blocked .
  I disabled Firewall in centos 
  I added firewall rule to google networking.<a href="http://i.stack.imgur.com/GJykl.png" rel="nofollow">1</a> 
  plz help m new to it.</p>