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  4. Googlebot does not obey robots.txt disallow

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Googlebot does not obey robots.txt disallow

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  • TalkInThePark
    TalkInThePark last edited by Nov 25, 2012, 12:13 PM

    Hi Mozzers!

    We are trying to get Googlebot to steer away from our internal search results pages by adding a parameter "nocrawl=1" to facet/filter links and then robots.txt disallow all URLs containing that parameter.

    We implemented this late august and since that, the GWMT message "Googlebot found an extremely high number of URLs on your site", stopped coming.

    But today we received yet another. The weird thing is that Google gives many of our nowadays robots.txt disallowed URLs as examples of URLs that may cause us problems.

    What could be the reason?

    Best regards,

    Martin

    1 Reply Last reply Reply Quote 0
    • Cyrus-Shepard
      Cyrus-Shepard @TalkInThePark last edited by Nov 29, 2012, 3:52 AM Nov 29, 2012, 3:52 AM

      Sorry for the late reply. Feel free to send me a PM. (not sure I can help, but more than happy to take a look)

      1 Reply Last reply Reply Quote 0
      • TalkInThePark
        TalkInThePark @TalkInThePark last edited by Nov 27, 2012, 7:38 AM Nov 27, 2012, 7:38 AM

        We do not currently have any sanitation rules in order to maintain the nocrawl param. But that is a good point. 301:ing will be difficult for us but I will definitely add the nocrawl param to the rel canonical of those internal SERPs.

        1 Reply Last reply Reply Quote 0
        • TalkInThePark
          TalkInThePark @Igal_Zeifman last edited by Nov 27, 2012, 7:32 AM Nov 27, 2012, 7:32 AM

          Thank you, Igol. I will definitely look into your first suggestion.

          1 Reply Last reply Reply Quote 0
          • TalkInThePark
            TalkInThePark @Cyrus-Shepard last edited by Nov 27, 2012, 7:28 AM Nov 27, 2012, 7:28 AM

            Thank you, Cyrus.

            This is what it looks like:

            User-agent: *
            Disallow: /nocrawl=1

            The weird thing is that when testing one of the sample URLs (given by Google as "problematic" in the GWMT message and that contains the nocrawl param) on the GWMT "Blocked URLs" page by entering the contents of our robots.txt and the sample URL, Google says crawling of the URL is disallowed for Googlebot.

            On the top of the same page, it says "Never" under the heading "Fetched when" (translated from Swedish..). But when i "Fetch as Google" our robots.txt, Googlebot has no problems fetching it. So i guess the "Never" information is due to a GWMT bug?

            I also tested our robots.txt against your recommended service http://www.frobee.com/robots-txt-check. It says all robots has access to the sample URL above, but I gather the tool is not wildcard-savvy.

            I will not disclose our domain in this context, please tell me if it is ok to send you a PW.

            About the noindex stuff. Basically, the nocrawl param is added to internal links pointing to internal search result pages filtered by more than two params. Although we allow crawling of less complicated internal serps, we disallow indexing of most of them by "meta noindex".

            Cyrus-Shepard 1 Reply Last reply Nov 29, 2012, 3:52 AM Reply Quote 0
            • Igal_Zeifman
              Igal_Zeifman @Cyrus-Shepard last edited by Nov 27, 2012, 5:18 AM Nov 27, 2012, 5:18 AM

              Thanks.

              100% agree with the Meta Noindex suggestion.

              1 Reply Last reply Reply Quote 0
              • Cyrus-Shepard
                Cyrus-Shepard last edited by Dec 8, 2012, 11:17 PM Nov 27, 2012, 2:00 AM

                It can be tricky blocking parameters with robots.txt. The first thing you want to do is make sure your are actually blocking the URLs. There are a few good robots.txt checkers out there that can help:

                • http://tool.motoricerca.info/robots-checker.phtml
                • http://www.frobee.com/robots-txt-check

                You're file is probably going to look something like:

                User-agent: *
                Disallow: /*?nocrawl=1

                ... but this could vary depending on exactly you don't want crawled

                +1 to Igal's suggestion of handling these via parameter settings in Google Webmaster Tools: http://support.google.com/webmasters/bin/answer.py?hl=en&answer=1235687

                Finally, if your goal is to keep search results out of the index (it probably should be) then you should also highly consider using a meta robots NOINDEX tag on all search results pages. You can also slap a nofollow on links pointing to search results as this might also help Google steer clear of those pages.

                Best of luck!

                Edit: Here's what John Wu of Google Webmaster has to say...

                "We show this warning when we find a high number of URLs on a site -- even before we attempt to crawl them. If you are blocking them with a robots.txt file, that's generally fine. If you really do have a high number of URLs on your site, you can generally ignore this message. If your site is otherwise small and we find a high number of URLs, then this kind of message can help you to fix any issues (or disallow access) before we start to access your server to check gazillions of URLs :-)."

                Igal_Zeifman TalkInThePark 2 Replies Last reply Nov 27, 2012, 7:28 AM Reply Quote 2
                • Igal_Zeifman
                  Igal_Zeifman @TalkInThePark last edited by Nov 27, 2012, 6:56 AM Nov 26, 2012, 1:02 PM

                  Didn't say it wasn't. 🙂

                  I`m just not sure how these rules apply to parameters, since they are not a part of the "core" URL.

                  (For example: What happens if I take a URL from your site, change a nocrawl=1 to nocrawl=0 and link to it from mine?
                  Do you have any URL sanitation rules in place to overcome that or will the page be indexed by Googlebot when it crawls my site and moves on to yours?)

                  Personally, when dealing with parameters, I find it easier to work with WMT so I was offering an easier workaround, (at least for me)

                  To tell you the truth, I would use hard-coded on page meta noindex/nofollow here (again, as parameters can be so easily manipulated).

                  1 Reply Last reply Reply Quote 1
                  • TalkInThePark
                    TalkInThePark @Igal_Zeifman last edited by Nov 26, 2012, 12:53 PM Nov 26, 2012, 12:53 PM

                    Igal, thank your for replying.

                    But robots.txt disallowing URLs by matching patterns has been supported by Googlebot for a long time now.

                    Igal_Zeifman TalkInThePark 2 Replies Last reply Nov 27, 2012, 7:38 AM Reply Quote 0
                    • Igal_Zeifman
                      Igal_Zeifman last edited by Nov 26, 2012, 11:59 AM Nov 26, 2012, 11:59 AM

                      Hi

                      I`m not sure if this is the best way to go about it.

                      Robots.txt is commonly used for folder level disallow rules, I`m not sure how it will respond to parameters.

                      Having said that, there are several things you can do here:

                      1. You can use WMT to zero in on this parameter and  prevent it from being searched.
                      To do so choose Configuration>>URL Parameters, answer "Yes" to the question about content change and  
                          check-in the 3rd bullet (Only URL with value...) Of course you'll need to choose "1" as the right value.

                      2. If this still didn't solve your issue, you might want to try using htacess + regex to prevent access by user agent.
                          You can find user-agent information here Googlebot user agent list

                      Also, you may want to check my blog post  about some of the less known Googlebot Facts (shameless self-promotion)

                      Best

                      Igal

                      TalkInThePark 2 Replies Last reply Nov 27, 2012, 7:32 AM Reply Quote 1
                      • TalkInThePark
                        TalkInThePark @dmccarthy last edited by Nov 25, 2012, 3:31 PM Nov 25, 2012, 3:31 PM

                        I'll send you a PW, Des.

                        1 Reply Last reply Reply Quote 0
                        • dmccarthy
                          dmccarthy last edited by Nov 25, 2012, 2:46 PM Nov 25, 2012, 2:46 PM

                          What the domain.?

                          TalkInThePark 1 Reply Last reply Nov 25, 2012, 3:31 PM Reply Quote 0
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