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.

      Track AI Overviews in Keyword Research
      Moz Pro

      Track AI Overviews in Keyword Research

      Try it free!
    • 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

      Access 20 years of data with flexible pricing
      Moz API

      Access 20 years of data with flexible pricing

      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. Technical SEO
    4. Subdomain Removal in Robots.txt with Conditional Logic??

    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.

    Subdomain Removal in Robots.txt with Conditional Logic??

    Technical SEO
    3
    3
    2434
    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.
    • ErnieB
      ErnieB last edited by

      I would like to see if there is a way to add conditional logic to the robots.txt file so that when we push from DEV to PRODUCTION and the robots.txt file is pushed, we don't have to remember to NOT push the robots.txt file OR edit it when it goes live.

      My specific situation is this:

      I have www.website.com, dev.website.com and new.website.com and somehow google has indexed the DEV.website.com and NEW.website.com and I'd like these to be removed from google's index as they are causing duplicate content.

      Should I:

      a) add 2 new GWT entries for DEV.website.com and NEW.website.com and VERIFY ownership - if I do this, then when the files are pushed to LIVE won't the files contain the VERIFY META CODE for the DEV version even though it's now LIVE? (hope that makes sense)

      b) write a robots.txt file that specifies "DISALLOW: DEV.website.com/" is that possible? I have only seen examples of DISALLOW with a "/" in the beginning...

      Hope this makes sense, can really use the help!  I'm on a Windows Server 2008 box running ColdFusion websites.

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

        Here's how I dealt with a similar situation in the past.

        Robots.txt on each of the dev subdomains and on the live domain. Dev subdomains robots.txt excluded the entire subdomain, and subdomains were verified in GWT and removed as needed.

        Made live subdomain robots.txt read-only so it didn't get overwritten. Should have made dev subdomains robots.txt read-only as well, since they sometimes got refreshed with the live content (there was a UGC database that would occasionally get copied to a dev subdomain, and we'd have robots.txt get copied over too and dev subdomain indexed).

        Set up a code monitor that checks the contents of all of the robots.txt daily and sends me an email if anything is changed.

        Not perfect, but I was at least able to catch changes soon after they happened, and prevented a few changes.

        1 Reply Last reply Reply Quote 1
        • irvingw
          irvingw last edited by

          you can't put logic in robots.txt and subdomains are seen as different sites, so you need to create separate robots.txt files for each subdomain and block them in their respective robots.txt files.

          You'll need to also add the Google verification code and verify them, then in GWMT you can request to have the subdomain removed from Googles index, that's the fastest way.

          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

          • Christian_T

            Homepage was removed from google and got deranked

            Hello experts I have a problem. The main page of my homepage got deranked severely and now I am not sure how to get the rank back. It started when I accidentally canonicalized the main page "https://kv16.dk" to a page that did not exist. 4 months later the page got deranked, and you were not able to see the "main page" in the search results at all, not even when searching for "kv16.dk". Then we discovered the canonicalization mistake and fixed it, and were able to get the main page back in the search results when searching for "kv16.dk". At first after we made the correction, some weeks passed by, and the ranking didn't get better.  Google search console recommended uploading a sitemap, do we did that. However in this sitemap there was a lot of "thin content sites", for all the wordpress attachments. E.g. for every image in an article. more exactly there were 91 of these attachment sites, and the rest of the page consists of only two pages "main page" and an extra landing page. After that google begun recommending the attachment urls in some searches. We tried fixing it by redirecting all the attachments to their simple form. E.g. if it was an attachment page for an image we redirected strait to the image. Google has not yet removed these attachment pages, so the question is if you think it will help to remove the attachments via google search console, or will that not help at all? For example when we search "kv16" an attachment URL named "birksø" is one of the first results

            Technical SEO | | Christian_T
            0
          • Jseddon92

            Should we remove category paths for better SEO?

            We're looking to build some serious content and capitalise on long-tail keyword traffic for our sub-category pages, example for targeted keyword "designer dining tables". Example of current link: www.website.com/designer-furniture/designer-dining-tables.html Would removing the category paths help? Example result - www.website.com/designer-dining-tables More user friendly URLs and better for SEO would you suggest? The only problem is, if we removed the paths would this have a hit on our traffic? Any advice would be much appreciated. We are using Magento platform.

            Technical SEO | | Jseddon92
            0
          • Whittie

            Robots.txt on subdomains

            Hi guys! I keep reading conflicting information on this and it's left me a little unsure. Am I right in thinking that a website with a subdomain of shop.sitetitle.com will share the same robots.txt file as the root domain?

            Technical SEO | | Whittie
            0
          • schof

            Should we move our documentation off subdomain?

            Background: We have a popular open source e-commerce platform at http://spreecommerce.com.  Right now the documentation is on http://guides.spreecommerce.com.  We have "edge" documentation (for stuff that's not yet released) on http://edgeguides.spreecommerce.com but since it's largely duplicative we've told google not to index any of the edge stuff (via robots.txt). Question: Should we consider moving the guides under the main website under /docs or something like this?  There's a ton of great content that people often read to learn more about the platform.  Seems like we might be diluting our juice a bit to have it on a separate domain.  WDYT?

            Technical SEO | | schof
            0
          • Prospector-Plastics

            Subdomain vs Main Domain Penalties

            We have a client who's main root.com domain is currently penalized by Google, but the subdomain.root.com is appearing very well. We're stumped - any ideas why?

            Technical SEO | | Prospector-Plastics
            0
          • ahockley

            Google insists robots.txt is blocking... but it isn't.

            I recently launched a new website.  During development, I'd enabled the option in WordPress to prevent search engines from indexing the site. When the site went public (over 24 hours ago), I cleared that option. At that point, I added a specific robots.txt file that only disallowed a couple directories of files.  You can view the robots.txt at http://photogeardeals.com/robots.txt Google (via Webmaster tools) is insisting that my robots.txt file contains a "Disallow: /" on line 2 and that it's preventing Google from indexing the site and preventing me from submitting a sitemap.  These errors are showing both in the sitemap section of Webmaster tools as well as the Blocked URLs section. Bing's webmaster tools are  able to read the site and sitemap just fine. Any idea why Google insists I'm disallowing everything even after telling it to re-fetch?

            Technical SEO | | ahockley
            0
          • JaredMumford

            Removing URL Parentheses in HTACCESS

            Im reworking a website for a client, and their current URLs have parentheses. I'd like to get rid of these, but individual 301 redirects in htaccess is not practical, since the parentheses are located in many URLs. Does anyone know an HTACCESS rule that will simply remove URL parantheses as a 301 redirect?

            Technical SEO | | JaredMumford
            0
          • Veva

            Can I remove 301 redirects after some time?

            Hello, We have an very large number of 301 redirects on our site and would like to find a way to remove some of them. Is there a time frame after which Google does not need a 301 any more? For example if A is 301 redirected to B, does Google know after a while not to serve A any more, and replaces any requests for A with B? How about any links that go to A? Or: Is the only option to have all links that pointed to A point to B and then the 301 can be removed after some time? Thank you for you you help!

            Technical SEO | | Veva
            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
          • Digital Marketers
          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.