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Will Subdomain Backlink affect Main Domain?

     
2:34 pm on Apr 6, 2009 (gmt 0)

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Hi,

The website that i am looking after has a sub-domain and the sub-domain is not linked from the main domain and the sub domain has backlinks from many spam links and untrusted forums. Will the backlinks of the sub-domain affect the main domain from seo point of view? and also will it affect the rankings and PR of the main domain? I have heard that Search engines will treat sub-domains as separate webite.

10:54 pm on Apr 24, 2009 (gmt 0)

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yes i heard the some i believe main domain does not have and negative effect from the sub domain. however i did not have any experience of it.
1:39 am on Apr 25, 2009 (gmt 0)

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Yes backlinks from sub-domain helps. But backlinks from spam site and untrusted forums don't do any good. The site might get ban from google if google see too much of this spam.

[edited by: coopster at 3:23 pm (utc) on April 25, 2009]
[edit reason] no signatures please TOS [webmasterworld.com] [/edit]

8:36 pm on Apr 28, 2009 (gmt 0)

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Will Subdomain Backlink affect Main Domain?

[dullest.com...]

A subdomain, however, is often a domain name system (DNS) alias. Subdomains can be a little more difficult for a novice webmaster to set up, especially if words like “CNAME” don’t mean anything to you. Subdomains can be managed separately, which can be a joy

those links should only affect the main site if the subdomain links to it.

7:21 pm on May 1, 2009 (gmt 0)

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neal, what do you mean by the links only affecting the main site if the subdomain links to it? Do you mean like an internal link where the subdomain has a link on the site that goes back to the main site?

I'm curious about this subject as well because our blog is a subdomain (blog.yoursite.com) where we often write about our featured products (and other news bits) that we do link back to the particular product on the main site using our keywords. Is this also considered internal linking (between subdomain and main site), and can subdomains be used to reciprocate a link if the participating site links to our main site instead?

9:45 pm on May 2, 2009 (gmt 0)

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They are treated separately. If there are truly no links between them the main site won't be affected by incoming spam links to the subdomain, in fact the subdomain may not be affected by them either.

If you're actively encouraging behavior that is against most search engine guidelines and policies a human may very well decide that you are a problem and adjust rankings accordingly, manually.