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. Research & Trends
    3. White Hat / Black Hat SEO
    4. Sub Domain rel=canonical to Main Domain

    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.

    Sub Domain rel=canonical to Main Domain

    White Hat / Black Hat SEO
    3
    3
    2093
    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.
    • Joseph-Vodafone
      Joseph-Vodafone last edited by

      Just a quick one, i have the following example scenario.

      Main Domain: http://www.test.com

      Sub Domain: http://sub.test.com

      What I am wondering is I can add onto the sub domain a rel=canonical to the main domain. I dont want to de-index the whole sub domain just a few pages are duplicated from the main site.

      Is it easier to de-index the individual sub domain pages or add the rel=canonical back to the main domain.

      Much appreciated

      Joseph

      1 Reply Last reply Reply Quote 0
      • Linda-Vassily
        Linda-Vassily last edited by

        Canonicalizing http://sub.test.com to http://www.test.com will tell Google that those two individual pages are the same and it should only index http://www.test.com--it won't affect other pages on the subdomain.

        If you only have a few subdomain pages that are duplicates of root domain pages, you can just use canonicals to indicate which pages you want indexed. You won't need to noindex the duplicate ones--they will fall out of Google's index naturally once Google sees which are the preferred, canonical ones.

        1 Reply Last reply Reply Quote 0
        • GastonRiera
          Gaston Riera last edited by

          Hi there,

          The Rel=canonical will not de-index those pages.

          To de-index, add a rel=robots with a noindex tag. And also add the rel=canonical or just redirect 301 the page. Of course, do it to those selected pages only.

          Hope it helps.
          GR.

          1 Reply Last reply Reply Quote 1
          • 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

          • teamtc

            Do links from subdomains pass the authority and link juice of main domain ?

            Hi, There is a subdomain with a root domain's DA  90. I can earn a backlink from that subdomain. This subdomain is fresh with no traffic yet. Do I get the ranking boost and authority from the subdomain? Example: I can earn a do-follow link from **https://what-is-crm.netlify.app/ **but not from https://netlify.app

            White Hat / Black Hat SEO | | teamtc
            0
          • HuptechWebseo

            Do we lose Backlinks and Domain Authority of URL when we change domain Name?

            Have 1 performing domain (Monthly - 4M visitor ) now we want to change domain name ( Brand name like SEOMOZ to Moz ). I have general knowledge about domain changing prevention tips like 301 redirection and other thing. My concern is about backlinks and DA. How can I prevent any lose from SEO Point of view. (backlink lose) Do I need to change all backlink form source or redirection is enough to get all reference traffic from that backlinks?

            White Hat / Black Hat SEO | | HuptechWebseo
            0
          • kamishah

            Is domain redirection a good method for SEO?

            I have a question and need suggestion from you guys. I’ve searched for my question on Google but don’t get exact information what I need. Maybe I can’t search perfectly.
            Let me explain my confusion:
            I’ve checked backlink profile of a website. He is not using his main domain while doing comment backlink. He put his another domain while doing comment backlink. The another domain redirect to the main domain. Why he use another domain while doing comment backlink?
            Is it helpful to get better rank on Google? For example: My Main Domain = solutionfall.com
            Another Domain= xyz.com (It redirect to solutionfall.com)
            He just uses xyz.com while doing comment backlink. Thank You so much  

            White Hat / Black Hat SEO | | kamishah
            1
          • RizwanAkbar

            Dfferent domains on same ip address ranking for the same keywords, is it possible?

            Hello, I want to ask if two domains which r hosted on the same server and have the same ip ( usually happens with shared hosts ) tries to rank for the same keywords in google, does the same ip affects them or not.

            White Hat / Black Hat SEO | | RizwanAkbar
            0
          • mickburkesnr

            Dealing with links to your domain that the previous owner set up

            Hey everyone, I rebranded my company at the end of last year from a name that was fairly unique but sounded like I cleaned headstones instead of building websites. I opted for a name that I liked, it reflected my heritage - however it also seems to be quite common. Anyway, I registered the domain name as it was available as the previous owner's company had been wound up. It's only been in the last week or two where I've managed to have a website on that domain and I've been tracking it's progress through Moz, Google & Bing Webmaster tools. Both the webmaster tools are reporting back that my site triggers 404 errors for some specific links. However, I don't have or have never used those links before. I think the previous owner might have created the links before he went bust. My question is in two parts. The first part is how do I find out what websites are linking to me with these broken URL's, and the second is will these 404'ing links affect my SEO? Thanks!

            White Hat / Black Hat SEO | | mickburkesnr
            0
          • remkoallertz

            Acquire domains to boost yours, how to redirect an acquired domain

            What is the best way to redirect for best SEO benefits? Examples: glaspunt.nl -> glas.nl fietstassen.eu -> loodgieter.nl Any technical information how to (root) redirect for best SEO practices?

            White Hat / Black Hat SEO | | remkoallertz
            0
          • Sir

            Why does expired domains still work for SEO?

            Hi everyone I’ve been doing an experiment during more than 1 year to try to see if its possible to buy expired domains. I know its considered black hat, but like I said, I wanted to experiment, that is what SEO is about. What I did was to buy domains that just expired, immediately added content on a WP setup, filled it with relevant content to the expired domain and then started building links to other relevant sites from these domains.( Here is a pretty good post on how to do, and I did it in a similar way. http://searchenginewatch.com/article/2297718/How-to-Build-Links-Using-Expired-Domains ) This is nothing new and SEO:s has been doing it for along time. There is a lot of rumors around the SEO world that the domains becomes worthless after they expire. But after trying it out during more than 1 year and with about 50 different expired domains I can conclude that it DOES work, 100% of the time. Some of the domains are of course better than others, but I cannot see any signs of the expired domains or the sites i link to has been punished by Google. The sites im liking to ranks great ONLY with those links 🙂 So to the question: WHY does Google allow this? They should be able to see that a domain has been expired right? And if its expired, why dont they just “delete” all the links to that domain after the expiry date? Google is well aware of this problem so what is stopping them? Is there any one here that know how this works technically?

            White Hat / Black Hat SEO | | Sir
            0
          • DROIDSTERS

            Rel Noindex Nofollow tag vs meta noindex nofollow

            Hi Mozzers I have a bit of thing I was pondering about this morning and would love to hear your opinion on it. So we had a bit of an issue on our client's website in the beginning of the year. I tried to find a way around it by using wild cards in my robots.txt but because different search engines treat wild cards differently it dint work out so well and only some search engines understood what I was trying to do. so here goes, I had a parameter on a big amount of URLs on the website with ?filter being pushed from the database we make use of filters on the site to filter out content for users to find what they are looking for much easier, concluding to database driven ?filter URLs (those ugly &^% URLs we all hate so much*. So what we looking to do is implementing nofollow noindex on all the internal links pointing to it the ?filter parameter URLs, however my SEO sense is telling me that the noindex nofollow should rather be on the individual ?filter parameter URL's metadata robots instead of all the internal links pointing the parameter URLs. Am I right in thinking this way? (reason why we want to put it on the internal links atm is because the of the development company states that they don't have control over the metadata of these database driven parameter URLs) If I am not mistaken noindex nofollow on the internal links could be seen as page rank sculpting where as onpage meta robots noindex nofolow is more of a comand like your robots.txt Anyone tested this before or have some more knowledge on the small detail of noindex nofollow? PS: canonical tags is also not doable at this point because we still in the process of cleaning out all the parameter URLs so +- 70% of the URLs doesn't have an SEO friendly URL yet to be canonicalized to. Would love to hear your thoughts on this. Thanks, Chris Captivate.

            White Hat / Black Hat SEO | | DROIDSTERS
            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.