Skip to content
    Moz logo Menu open Menu close
    • Products
      • Moz Pro
      • Moz Pro Home
      • Moz Local
      • Moz Local Home
      • STAT
      • Moz API
      • Moz API Home
      • Compare SEO Products
      • Moz Data
    • Free SEO Tools
      • Domain Analysis
      • Keyword Explorer
      • Link Explorer
      • Competitive Research
      • MozBar
      • More Free SEO Tools
    • Learn SEO
      • Beginner's Guide to SEO
      • SEO Learning Center
      • Moz Academy
      • MozCon
      • Webinars, Whitepapers, & Guides
    • Blog
    • Why Moz
      • Digital Marketers
      • Agency Solutions
      • Enterprise Solutions
      • Small Business Solutions
      • The Moz Story
      • New Releases
    • Log in
    • Log out
    • Products
      • Moz Pro

        Your all-in-one suite of SEO essentials.

      • Moz Local

        Raise your local SEO visibility with complete local SEO management.

      • STAT

        SERP tracking and analytics for enterprise SEO experts.

      • Moz API

        Power your SEO with our index of over 44 trillion links.

      • Compare SEO Products

        See which Moz SEO solution best meets your business needs.

      • Moz Data

        Power your SEO strategy & AI models with custom data solutions.

      Let your business shine with Listings AI
      Moz Local

      Let your business shine with Listings AI

      Learn more
    • Free SEO Tools
      • Domain Analysis

        Get top competitive SEO metrics like DA, top pages and more.

      • Keyword Explorer

        Find traffic-driving keywords with our 1.25 billion+ keyword index.

      • Link Explorer

        Explore over 40 trillion links for powerful backlink data.

      • Competitive Research

        Uncover valuable insights on your organic search competitors.

      • MozBar

        See top SEO metrics for free as you browse the web.

      • More Free SEO Tools

        Explore all the free SEO tools Moz has to offer.

      NEW Keyword Suggestions by Topic
      Moz Pro

      NEW Keyword Suggestions by Topic

      Learn more
    • Learn SEO
      • Beginner's Guide to SEO

        The #1 most popular introduction to SEO, trusted by millions.

      • SEO Learning Center

        Broaden your knowledge with SEO resources for all skill levels.

      • On-Demand Webinars

        Learn modern SEO best practices from industry experts.

      • How-To Guides

        Step-by-step guides to search success from the authority on SEO.

      • Moz Academy

        Upskill and get certified with on-demand courses & certifications.

      • MozCon

        Save on Early Bird tickets and join us in London or New York City

      Unlock flexible pricing & new endpoints
      Moz API

      Unlock flexible pricing & new endpoints

      Find your plan
    • Blog
    • Why Moz
      • Digital Marketers

        Simplify SEO tasks to save time and grow your traffic.

      • Small Business Solutions

        Uncover insights to make smarter marketing decisions in less time.

      • Agency Solutions

        Earn & keep valuable clients with unparalleled data & insights.

      • Enterprise Solutions

        Gain a competitive edge in the ever-changing world of search.

      • The Moz Story

        Moz was the first & remains the most trusted SEO company.

      • New Releases

        Get the scoop on the latest and greatest from Moz.

      Surface actionable competitive intel
      New Feature

      Surface actionable competitive intel

      Learn More
    • Log in
      • Moz Pro
      • Moz Local
      • Moz Local Dashboard
      • Moz API
      • Moz API Dashboard
      • Moz Academy
    • Avatar
      • Moz Home
      • Notifications
      • Account & Billing
      • Manage Users
      • Community Profile
      • My Q&A
      • My Videos
      • Log Out

    The Moz Q&A Forum

    • Forum
    • Questions
    • Users
    • Ask the Community

    Welcome to the Q&A Forum

    Browse the forum for helpful insights and fresh discussions about all things SEO.

    1. Home
    2. SEO Tactics
    3. Intermediate & Advanced SEO
    4. Robots Disallow Backslash - Is it right command

    Moz Q&A is closed.

    After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.

    Robots Disallow Backslash - Is it right command

    Intermediate & Advanced SEO
    2
    5
    998
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as question
    Log in to reply
    This topic has been deleted. Only users with question management privileges can see it.
    • Modi
      Modi last edited by

      Bit skeptical, as due to dynamic url and some other linkage issue, google has crawled url with backslash and asterisk character

      ex - www.xyz.com/\/index.php?option=com_product

      www.xyz.com/\"/index.php?option=com_product

      Now %5c is the encoded version of \ - backslash & %22 is encoded version of asterisk

      Need to know for command :-

      User-agent: *   Disallow: \As am disallowing all backslash url through this - will it only remove the backslash url which are duplicates or the entire site,

      1 Reply Last reply Reply Quote 0
      • Modi
        Modi @Everett last edited by

        Thanks, you seem lucky to me.. Almost after 2 month i have got the code for making all these encoded url's redirect correctly. Finally, now if one types

        http://www.mycarhelpline.com/\"/index.php?option=com_latestnews&view=list&Itemid=10

        then he's redirected through 301 to the correct url

        http://www.mycarhelpline.com/index.php?option=com_latestnews&view=list&Itemid=10

        1 Reply Last reply Reply Quote 0
        • Everett
          Everett @Modi last edited by

          Hello Gagan,

          I think the best way to handle this would be using the rel canonical tag or rewriting the URLs to get rid of the parameters and replace them with something more user-friendly.

          The rel canonical tag would be the easiest way out of those two. I notice the version without the encoding (e.g. http://www.mycarhelpline.com/index.php?option=com_latestnews&view=list&Itemid=10 ) have a rel canonical tag that correctly references itself as the canonical version. However, the encoded URLs (e.g. http://www.mycarhelpline.com/\"/index.php?option=com_latestnews&view=list&Itemid=10) which is actually http://www.mycarhelpline.com/\"/index.php?option=com_latestnews&view=list&Itemid=10 does NOT have a rel canonical tag.

          If the version with the backslash had a rel canonical tag stating that the following URL is canonical it would solve your issue, I think.
          Canonical URL:
          http://www.mycarhelpline.com/index.php?option=com_latestnews&view=list&Itemid=10

          Modi 1 Reply Last reply Reply Quote 1
          • Modi
            Modi @Everett last edited by

            Sure, If i show you some url they are crawled as :-

            Sample Incorrect URLs crawled and reported as duplicate one in Google Webmaster & Moz too

            |

            http://www.mycarhelpline.com/\"/index.php?option=com_latestnews&view=list&Itemid=10

            | http://www.mycarhelpline.com/\"/index.php?option=com_newcar&view=category&Itemid=2 |

            |

            Correct URL

            http://www.mycarhelpline.com/index.php?option=com_latestnews&view=list&Itemid=10

            http://www.mycarhelpline.com/index.php?option=com_newcar&view=search&Itemid=2

            What we found online

            Since URLs often contain characters outside the ASCII set, the URL has to be converted into a valid ASCII format. URL encoding replaces unsafe ASCII characters with a "%" followed by two hexadecimal digits. URLs cannot contain spaces.

            %22 reflects - " and %5c as \ (forward slash)

            We intend to remove these duplicate one created having %22 and %5c within them..

            Many thanks

            Everett 1 Reply Last reply Reply Quote 0
            • Everett
              Everett last edited by

              I am not entirely sure I understood your question as intended, but I will do my best to answer.

              I would not put this in my robots.txt flie because it could possibly be misunderstood as a forward slash, in which case your entire domain would be blocked:

              Disallow: \

              We can possibly provide you with some alternative suggestions on how to keep Google from crawling those pages if you could share some real examples.

              It may be best to rewrite/redirect those URls instead since they don't seem to be the canonical version you intend to be presented to the user.

              Modi 1 Reply Last reply Reply Quote 0
              • 1 / 1
              • First post
                Last post

              Got a burning SEO question?

              Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.


              Start my free trial


              Browse Questions

              Explore more categories

              • Moz Tools

                Chat with the community about the Moz tools.

              • SEO Tactics

                Discuss the SEO process with fellow marketers

              • Community

                Discuss industry events, jobs, and news!

              • Digital Marketing

                Chat about tactics outside of SEO

              • Research & Trends

                Dive into research and trends in the search industry.

              • Support

                Connect on product support and feature requests.

              • See all categories

              Related Questions

              • bgvsiteadmin

                No index detected in robots meta tag GSC issue_Help Please

                Hi Everyone, We just did a site migration ( URL structure change, site redesign, CMS change). During migration, dev team messed up badly on a few things including SEO. The old site had pages canonicalized and self canonicalized <> New site doesn't have anything (CMS dev error) so we are working retroactively to add canonicalization mechanism The legacy site had URL’s ending with a trailing slash “/” <> new site got redirected to Set of url’s without “/” New site action : All robots are allowed: A new sitemap is submitted to google search console So here is my problem (it been a long 24hr night for me  🙂 ) 1. Now when I look at GSC homepage URL it says that old page is self canonicalized and currently in index (old page with a trailing slash at the end of URL). 2. When I try to perform a live URL test, I get the message "No: 'noindex' detected in 'robots' meta tag" , so indexation cant be done. I have no idea where noindex is coming from. 3. Robots.txt in search console still showing old file ( no noindex there ) I tried to submit new file but old one still coming up. When I click on "See live robots.txt" I get current robots. 4. I see that old page is still canonicalized and attempting to index redirected old page might be confusing google Hope someone can help to get the new page indexed! I really need it 🙂  Please ping me if you need more clarification. Thank you ! Thank you

                Intermediate & Advanced SEO | | bgvsiteadmin
                1
              • ThomasHarvey

                What do you add to your robots.txt on your ecommerce sites?

                We're looking at expanding our robots.txt, we currently don't have the ability to noindex/nofollow. We're thinking about adding the following: Checkout Basket Then possibly: Price Theme Sortby other misc filters. What do you include?

                Intermediate & Advanced SEO | | ThomasHarvey
                0
              • jmorehouse

                Should I disallow all URL query strings/parameters in Robots.txt?

                Webmaster Tools correctly identifies the query strings/parameters used in my URLs, but still reports duplicate title tags and meta descriptions for the original URL and the versions with parameters. For example, Webmaster Tools would report duplicates for the following URLs, despite it correctly identifying the "cat_id" and "kw" parameters: /Mulligan-Practitioner-CD-ROM
                /Mulligan-Practitioner-CD-ROM?cat_id=87
                /Mulligan-Practitioner-CD-ROM?kw=CROM Additionally, theses pages have self-referential canonical tags, so I would think I'd be covered, but I recently read that another Mozzer saw a great improvement after disallowing all query/parameter URLs, despite Webmaster Tools not reporting any errors. As I see it, I have two options: Manually tell Google that these parameters have no effect on page content via the URL Parameters section in Webmaster Tools (in case Google is unable to automatically detect this, and I am being penalized as a result). Add "Disallow: *?" to hide all query/parameter URLs from Google. My concern here is that most backlinks include the parameters, and in some cases these parameter URLs outrank the original. Any thoughts?

                Intermediate & Advanced SEO | | jmorehouse
                0
              • IHSwebsite

                Robots.txt: Can you put a /* wildcard in the middle of a URL?

                We have noticed that Google is indexing the language/country directory versions of directories we have disallowed in our robots.txt. For example: Disallow: /images/ is blocked just fine However, once you add our /en/uk/ directory in front of it, there are dozens of pages indexed. The question is: Can I put a wildcard in the middle of the string, ex. /en/*/images/, or do I need to list out every single country for every language in the robots file. Anyone know of any workarounds?

                Intermediate & Advanced SEO | | IHSwebsite
                0
              • gregelwell

                Could you use a robots.txt file to disalow a duplicate content page from being crawled?

                A website has duplicate content pages to make it easier for users to find the information from a couple spots in the site navigation. Site owner would like to keep it this way without hurting SEO. I've thought of using the robots.txt file to disallow search engines from crawling one of the pages. Would you think this is a workable/acceptable solution?

                Intermediate & Advanced SEO | | gregelwell
                0
              • udemy

                Disallowed Pages Still Showing Up in Google Index. What do we do?

                We recently disallowed a wide variety of pages for www.udemy.com which we do not want google indexing (e.g., /tags or /lectures). Basically we don't want to spread our link juice around to all these pages that are never going to rank. We want to keep it focused on our core pages which are for our courses. We've added them as disallows in robots.txt, but after 2-3 weeks google is still showing them in it's index. When we lookup "site: udemy.com", for example, Google currently shows ~650,000 pages indexed... when really it should only be showing ~5,000 pages indexed. As another example, if you search for "site:udemy.com/tag", google shows 129,000 results. We've definitely added "/tag" into our robots.txt properly, so this should not be happening... Google showed be showing 0 results. Any ideas re: how we get Google to pay attention and re-index our site properly?

                Intermediate & Advanced SEO | | udemy
                0
              • kylesuss

                Block an entire subdomain with robots.txt?

                Is it possible to block an entire subdomain with robots.txt? I write for a blog that has their root domain as well as a subdomain pointing to the exact same IP. Getting rid of the option is not an option so I'd like to explore other options to avoid duplicate content. Any ideas?

                Intermediate & Advanced SEO | | kylesuss
                12
              • nicole.healthline

                Robots.txt & url removal vs. noindex, follow?

                When de-indexing pages from google, what are the pros & cons of each of the below two options: robots.txt & requesting url removal from google webmasters Use the noindex, follow meta tag on all doctor profile pages Keep the URLs in the Sitemap file so that Google will recrawl them and find the noindex meta tag make sure that they're not disallowed by the robots.txt file

                Intermediate & Advanced SEO | | nicole.healthline
                0

              Get started with Moz Pro!

              Unlock the power of advanced SEO tools and data-driven insights.

              Start my free trial
              Products
              • Moz Pro
              • Moz Local
              • Moz API
              • Moz Data
              • STAT
              • Product Updates
              Moz Solutions
              • SMB Solutions
              • Agency Solutions
              • Enterprise Solutions
              Free SEO Tools
              • Domain Authority Checker
              • Link Explorer
              • Keyword Explorer
              • Competitive Research
              • Brand Authority Checker
              • Local Citation Checker
              • MozBar Extension
              • MozCast
              Resources
              • Blog
              • SEO Learning Center
              • Help Hub
              • Beginner's Guide to SEO
              • How-to Guides
              • Moz Academy
              • API Docs
              About Moz
              • About
              • Team
              • Careers
              • Contact
              Why Moz
              • Case Studies
              • Testimonials
              Get Involved
              • Become an Affiliate
              • MozCon
              • Webinars
              • Practical Marketer Series
              • MozPod
              Connect with us

              Contact the Help team

              Join our newsletter
              Moz logo
              © 2021 - 2025 SEOMoz, Inc., a Ziff Davis company. All rights reserved. Moz is a registered trademark of SEOMoz, Inc.
              • Accessibility
              • Terms of Use
              • Privacy

              Looks like your connection to Moz was lost, please wait while we try to reconnect.