got the issue..

I was modifying /etc/hosts file with following information:

Public_IP Public_DNS Private_DNS Private_IP Alias1

Public_IP Public_DNS Private_DNS Private_IP Alias2

Public_IP Public_DNS Private_DNS Private_IP Alias3

I just commented out the stuff and my /etc/hosts file is virgin:

127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6

And this fixed the issue.. strange.. if someone could explain it'll be great.