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?
-
Awesome! That did the trick -- thanks for your help. The site is no longer listed
-
Fact is, the robots file alone will never work (the link has a good explanation why - short form: all it does is stop the bots from indexing again).
Best to request removal then wait a few days.
-
Yeah. As of yet, the site has not been de-indexed. We placed the conditional rule in htaccess and are getting different robots.txt files for the domain and subdomain -- so that works. But I've never done this before so I don't know how long it's supposed to take?
I'll try to verify via Webmaster Tools to speed up the process. Thanks
-
You should do a remove request in Google Webmaster Tools. You have to first verify the sub-domain then request the removal.
See this post on why the robots file alone won't work...
http://www.seomoz.org/blog/robot-access-indexation-restriction-techniques-avoiding-conflicts
-
Awesome. We used your second idea and so far it looks like it is working exactly how we want. Thanks for the idea.
Will report back to confirm that the subdomain has been de-indexed.
-
Option 1 could come with a small performance hit if you have a lot of txt files being used on the server.
There shouldn't be any negative side effects to option 2 if the rewrite is clean (IE not accidently a redirect) and the content of the two files are robots compliant.
Good luck
-
Thanks for the suggestion. I'll definitely have to do a bit more research into this one to make sure that it doesn't have any negative side effects before implementation
-
We have a plugin right now that places canonical tags, but unfortunately, the canonical for the subdomain points to the subdomain. I'll look around to see if I can tweak the settings
-
Sounds like (from other discussions) you may be stuck requiring a dynamic robot.txt file which detects what domain the bot is on and changes the content accordingly. This means the server has to run all .txt file as (I presume) PHP.
Or, you could conditionally rewrite the /robot.txt URL to a new file according to sub-domain
RewriteEngine on
RewriteCond %{HTTP_HOST} ^subdomain.website.com$
RewriteRule ^robotx.txt$ robots-subdomain.txtThen add:
User-agent: *
Disallow: /to the robots-subdomain.txt file
(untested)
-
Placing canonical tags isn't an option? Detect that the page is being viewed through the subdomain, and if so, write the canonical tag on the page back to the root domain?
Or, just place a canonical tag on every page pointing back to the root domain (so the subdomain and root domain pages would both have them). Apparently, it's ok to have a canonical tag on a page pointing to itself. I haven't tried this, but if Matt Cutts says it's ok...
-
Hey Ryan,
I wasn't directly involved with the decision to create the subdomain, but I'm told that it is necessary to create in order to bypass certain elements that were affecting the root domain.
Nevertheless, it is a blog and the users now need to login to the subdomain in order to access the Wordpress backend to bypass those elements. Traffic for the site still goes to the root domain.
-
They both point to the same location on the server? So there's not a different folder for the subdomain?
If that's the case then I suggest adding a rule to your htaccess file to 301 the subdomain back to the main domain in exactly the same way people redirect from non-www to www or vice-versa. However, you should ask why the server is configured to have a duplicate subdomain? You might just edit your apache settings to get rid of that subdomain (usually done through a cpanel interface).
Here is what your htaccess might look like:
<ifmodule mod_rewrite.c="">RewriteEngine on
# Redirect non-www to wwww
RewriteCond %{HTTP_HOST} !^www.mydomain.org [NC]
RewriteRule ^(.*)$ http://www.mydomain.org/$1 [R=301,L]</ifmodule> -
Not to me LOL
I think you'll need someone with a bit more expertise in this area than I to assist in this case. Kyle, I'm sorry I couldn't offer more assistance... but I don't want to tell you something if I'm not 100% sure. I suspect one of the many bright SEOmozer's will quickly come to the rescue on this one.
Andy
-
Hey Andy,
Herein lies the problem. Since the domain and subdomain point to the exact same place, they both utilize the same robots.txt file.
Does that make sense?
-
Hi Kyle
Yes, you can block an entire subdomain via robots.txt, however you'll need to create a robots.txt file and place it in the root of the subdomain, then add the code to direct the bots to stay away from the entire subdomain's content.
User-agent: *
Disallow: /hope this helps
Got a burning SEO question?
Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.
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.
Related Questions
-
New Subdomain & Best Way To Index
We have an ecommerce site, we'll say at https://example.com. We have created a series of brand new landing pages, mainly for PPC and Social at https://sub.example.com, but would also like for these to get indexed. These are built on Unbounce so there is an easy option to simply uncheck the box that says "block page from search engines", however I am trying to speed up this process but also do this the best/correct way. I've read a lot about how we should build landing pages as a sub-directory, but one of the main issues we are dealing with is long page load time on https://example.com, so I wanted a kind of fresh start. I was thinking a potential solution to index these quickly/correctly was to make a redirect such as https://example.com/forward-1 -> https:sub.example.com/forward-1 then submit https://example.com/forward-1 to Search Console but I am not sure if that will even work. Another possible solution was to put some of the subdomain links accessed on the root domain say right on the pages or in the navigation. Also, will I definitely be hurt by 'starting over' with a new website? Even though my MozBar on my subdomain https://sub.example.com has the same domain authority (DA) as the root domain https://example.com? Recommendations and steps to be taken are welcome!
Intermediate & Advanced SEO | | Markbwc0 -
The Great Subdomain vs. Subfolder Debate, what is the best answer?
Recently one of my clients was hesitant to move their new store locator pages to a subdomain. They have some SEO knowledge and cited the whiteboard Friday article at https://moz.com/blog/subdomains-vs-subfolders-rel-canonical-vs-301-how-to-structure-links-optimally-for-seo-whiteboard-friday. While it is very possible that Rand Fiskin has a valid point I felt hesitant to let this be the final verdict. John Mueller from Google Webmaster Central claims that Google is indifferent towards subdomains vs subfolders. https://www.youtube.com/watch?v=9h1t5fs5VcI#t=50 Also this SEO disagreed with Rand Fiskin’s post about using sub folders instead of sub domains. He claims that Rand Fiskin ran only 3 experiments over 2 years, while he has tested multiple subdomain vs subfolder experiments over 10 years and observed no difference. http://www.seo-theory.com/2015/02/06/subdomains-vs-subfolders-what-are-the-facts-on-rankings/ Here is another post from the Website Magazine. They too believe that there is no SEO benefits of a subdomain vs subfolder infrastructure. Proper SEO and infrastructure is what is most important. http://www.websitemagazine.com/content/blogs/posts/archive/2015/03/10/seo-inquiry-subdomains-subdirectories.aspx Again Rand might be right, but I rather provide a recommendation to my client based on an authoritative source such as a Google engineer like John Mueller. Does anybody else have any thoughts and/or insight about this?
Intermediate & Advanced SEO | | RosemaryB3 -
Use Canonical or Robots.txt for Map View URL without Backlink Potential
I have a Page X with lots of unique content. This page has a "Map view" option, which displays some of the info from Page X, but a lot is ommitted. Questions: Should I add canonical even though Map View URL does not display a lot of info from Page X or adding to robots.txt or noindex, follow? I don't see any back links coming to Map View URL Should Map View page have unique H1, title tag, meta des?
Intermediate & Advanced SEO | | khi50 -
Should I disallow via robots.txt for my sub folder country TLD's?
Hello, My website is in default English and Spanish as a sub folder TLD. Because of my Joomla platform, Google is listing hundreds of soft 404 links of French, Chinese, German etc. sub TLD's. Again, i never created these country sub folder url's, but Google is crawling them. Is it best to just "Disallow" these sub folder TLD's like the example below, then "mark as fixed" in my crawl errors section in Google Webmaster tools?: User-agent: * Disallow: /de/ Disallow: /fr/ Disallow: /cn/ Thank you, Shawn
Intermediate & Advanced SEO | | Shawn1240 -
Moving popular blog from root to subdomain. Considerations & impact?
I'd like to move the popular company blog from /ecommerce-blog to blog.bigcommerce.com.WordPress application is currently living inside the application that runs the .com and is adding a large amount of files to the parent app, which results in longer deployment times than we'd like. We would use HTTP redirection to handle future requests (e.g. HTTP status code 301). How can this be handled from a WP point of view? What is the impact of SEO, rankings, links, authority? Thanks.
Intermediate & Advanced SEO | | fullstackmarketing.io0 -
Subdomain blog vs. subfolder blog in 2013.
Having read this ( http://www.seomoz.org/q/blog-on-a-subdomain-vs-subfolder ) & countless of blog posts on never to put your blog on a domain because a subdomain is treated as a different site & your blog traffic won't help with your main sites authority. I've always pushed for subfolder blogs. However I've been seeing a lot of blogs now and days saying that Google is now treating subdomains as the same site as your main site. http://www.brafton.com/news/subdomains-vs-subdirectories-for-seo-no-serp-benefits-for-subdomains-anymore http://webmasters.stackexchange.com/questions/34173/subdomains-vs-subdirectory-status-as-of-2012/34366#34366 ETC... What does everyone think? Is it acceptable to have a blog in a subdomain in 2013? Thanks!
Intermediate & Advanced SEO | | DCochrane0 -
How to remove an entire site from Google?
Hi people, I have a site with around 2.000 urls indexed in google, and 10 subdomains indexed too, which I want to remove entirely, to set up a new web. Which is the best way to do it? Regards!
Intermediate & Advanced SEO | | SeoExpertos0 -
Why specify robots instead of googlebot for a Panda affected site?
Daniweb is the poster child for sites that have recovered from Panda. I know one strategy she mentioned was de-indexing all of her tagged content, fo rexample: http://www.daniweb.com/tags/database Why do you think more Panda affected sites specifying 'googlebot' rather than 'robots' to capture traffic from Bing & Yahoo?
Intermediate & Advanced SEO | | nicole.healthline0