Tag Archives: domain name system

Some websites are not loading: DNS misconfiguration

I have a weird problem few days back. After changing my ISP, some websites are stopped working by giving mis-configuration error in the DNS (Domain Name System) . So, I have started digging on that. I found so many users with Same problem. Some providing solution to change the MTU size of the router. I don’t even know, what is an MTU and how to change it?

After a few days, I found an answer from random forum, that change the DNS of the adaptor to Google Public DNS. So, I searched in google for it and found it.

Google Public DNS is a free, global Domain Name System (DNS) resolution service, that you can use as an alternative to your current DNS provider.  It’s speed up your browsing experience and also providing more secure data during browsing.

The Google Public DNS IPv4 addresses are as follows:


The Google Public DNS IPv6 addresses are as follows:

  • 2001:4860:4860::8888
  • 2001:4860:4860::8844

You can use either number as your primary or secondary DNS server. You can specify both numbers, but do not specify one number as both primary and secondary.

You can configure Google Public DNS addresses for either IPv4 or IPv6 connections, or both.
To change your DNS settings, please refer the following link, https://developers.google.com/speed/public-dns/docs/using

Note: Before start using Google Public DNS, please write down your current setting IP addresses of DNS for backup. In case you need to revert the settings.