Do search engines index add-on domains as subfolders?

Let's say i have a site:

mysite.com

and an add-on domain:

myaddon.com (which is actually myaddon.mysite.com)


I assume, if I don't post the subdomain link anywhere it is not indexed as subdomain, true?

This is the real issue:

Since I have a folder mysite.com/myaddon search engines normally index that directory as well.
Should I disallow this with robots.txt?
Sould this disallow effect the indexing of the add-on domain? (I assume not)

Thanks.

 

That's right.

Only if there is somewhere a link pointing to it.

As you cannot be sure there will never be a link to a "bad" URL, there are two possible approaches:
- robots.txt to disallow access to URL's you do not want to be crawled;
- .htaccess to redirect any access from a "bad" URL to a "good" URL.

robots.txt is the best solution if there are no important links pointing to the "bad" addresses; .htaccess should be prefered otherwise.

Jean-Luc

 

thanks, very useful info for me

 

subdomains are seen as different sites.

 

Google see sub domain as different site (only Google)