RHEV Manager Installed on windows machine which is running firewall doesn't allow the connection from RHEV Hypervisor to RHEV Manager and vice versa. Here is the quick way to enable required ports on the windows firewall running RHEV Manager .
Open the Command Prompt (Run --> cmd ) on your windows machine and run these below script that will open all the required ports .
c:\> for /D %p in
do (netsh firewall add portopening protocol
= TCP port = %p name = RHEVM%p)
c:\> netsh firewall set icmpsetting 8 enable