For my site webmaster tool showing crawl error "Google couldn't access your site because of a DNS error".
Google not indexing my site.
Although it showing error at "6/30/12Errors / Attempts:0 / 163 (0%)".
Please give me a suggestion.
I think this is a temporary problem, perhaps if you changed the hosting server, or in that time the hosting server was down.
If you can access your web site, it's ok, it takes a few days till the error will be deleted from google.
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Thanks brother MarPlo....