Finally after a month or two found the answer to be the DNS configuration for my wifi router. it was such a big pain in the a.. till then :-)
Tried all NAT port forwarding even but later through some forum which hinted on the configured dns i changed the value from 0.0.0.0 to 8.8.8.8 (which is a google one). Got the setting under DHCP Server tab under :LAN. to reflect disconnect and connect your laptop/mobile to the wifi.
Tried all NAT port forwarding even but later through some forum which hinted on the configured dns i changed the value from 0.0.0.0 to 8.8.8.8 (which is a google one). Got the setting under DHCP Server tab under :LAN. to reflect disconnect and connect your laptop/mobile to the wifi.