Hi All, We have a crawler problem on one of our sites www.sneakerskoopjeonline.nl. On this site, visitors can specify criteria to filter available products. These filters are passed as http/get arguments. The number of possible filter urls is virtually limitless. In order to prevent duplicate content, or an insane amount of pages in the search indices, our software automatically adds noindex, nofollow and noarchive directives to these filter result pages. However, we’re unable to explain to crawlers (Google in particular) to ignore these urls. We’ve already changed the on page filter html to javascript, hoping this would cause the crawler to ignore it. However, it seems that Googlebot executes the javascript and crawls the generated urls anyway. What can we do to prevent Google from crawling all the filter options? Thanks in advance for the help. Kind regards, Gerwin