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On our website we have content which is located behind a members login. the SEOMoz crawl report has returned these pages with a "no title" error against them. It appears that these pages are being crawled until the website prompts it to login. I can only presume that it follows the url but doesn't have an opportunity to crawl the meta data. what is the solution for these pages? 401, so that the bots know these pages are behind a login? do we implement anything to ensure "no index", "no follow"? I searched the T'interwebs and couldn't find anything conclusive on this issue.