How do I know my domain name (DNS) is resolving correctly so that Googlebot and users can access my site?
If Googlebot fails to reach your site due to your DNS setup, this will be reported in your Webmaster Tools account in the Crawl Errors section. To confirm that Googlebot is currently able to crawl your site, use the Fetch As Googlebot Webmaster Tools feature. If it is possible to fetch your homepage without problems, you can assume that Googlebot is generally able to access your site properly. Although most warnings / errors mentioned by DNS-testing tools do not affect Googlebot’s ability to access your site, it may still make sense to review them as they may affect your site’s latency as perceived by your users.
