Okay thanks alot for taking all the pains. ISP is mot helpful at all. Lets hope tplink release some firmware update to resolve this issue.

When i run ping from diagnostic in setting, i am getting response with 0% packet loss. The issue remains same even when using ISP dns i.e when u checked the option.

@terziyski hey thanks for taking time to reply. I did run thise commands and have attached here. I can ping IPs but not domain's. Cant seem to understand the cause of this behaviour. Seems weird to...

@terziyski i made these changes and it made no difference at all. No able to get internet access

Thanks for the info brother but i have checked the post and its not possible for my ISP to configure as he wants me to buy his own modem. I am able to rung ping test via modem and i am getting reply...

Removing these settings had no influence on the connection. Tried it still no internet