Google crawl errors "DNS issue- link unreachable and time out errors

Question

Can any one tell me why Googlebot cant fetch my website and its links? I have a website and for past 30 days Google Webmasters can't fetch any links from my website. This caused the removal of my website from Google search. I also tried "fetch as Googlebot" option but it failed. The error it's showing is "DNS issue-Links unreachable and Time out error". I also have Google Analytics and Bing Webmasters Tools accounts which work fine (Bing crawls and fetches links from my website). I can access my website through browsers also. I have searched other forums and found out that it may be my hosting providers blocking Googlebot. When I wrote to them they told me that they have allowed Googlebot to my website.

Now I have become a little frustrated about this problem. I really don't know why this error is occurring. I cant even add Google AdSense because of this problem. If anyone has or had this kind of error can they suggest what causing it?

Answer 1

This answer is from a Google Employee about the same problem http://groups.google.com/a/googleproductforums.com/d/msg/webmasters/0t6FGoQV7wc/1x40gX6GU8QJ

It looks like most requests we send to both of your DNS servers are timing out since ca. beginning February. In general, this can mean that we won't be able to crawl your content or read your Sitemap files. I would recommend working together with your hoster to try to find out more -- or if you can't, perhaps move your DNS to a different server temporarily so that you can work out the issues without having to worry about your site.

I would contact your hosting provider, and DNS provider to ask what the problem is.

Here are common webmaster tool errors http://support.google.com/webmasters/bin/answer.py?hl=en&answer=35147