I am running static content through a CDN, cdn1-cdn5 I am using such subdomains for that.
I am loading just images, CSS and JS files this way, but apparently Google has indexed some pages on subdomains and they now appear in the Google index and they are duplicates of my "normal" pages.
The thing is that CDN is set the way to have files appear on subdomains without any extra uploading of stuff, meaning subdomains are mirror copies of content that is on main site, I can't upload files to subdomains, I can upload to main site and change www to cdn1 in address bar to show the same content through the CDN as is on my site.
I have 2 questions:
- how do I remove the subdomains from Google index in GWT if it only allows to write anything that goes after `http://domain.com/ ?
- how do I prevent from bots indexing the pages on subdomains when I can't upload special robots.txt files or upload a google's verification files to them to prove my ownership in GWT?
Maybe there is something else that I need to know related to this matter?
UPDATE: text in bold is updated