How to prevent duplicat content issue and indexing sub domain [ CDN sub domain]?

[Godad]

Hello!

I wish to use CDN server to optimize my page loading time ( MaxCDN). I have to use a custom CDN sub domain to use these services. If I added a sub domain, then my blog has two URL (http://www.example.com and http://cdn.example.com) for the same content. I have more than 450 blog posts.

I think it will cause duplicate content issues.

In this situation, what is the best method (rel=canonical or no-indexing) to prevent duplicate content issue and prevent indexing sub domain? And take the optimum service of the CDN.

Thanks!

[Dr-Pete]

There's no way to reverse proxy and hide that sub-domain? Ideally, a CDN for content itself would never be seen by the crawlers. If people are going to actually see this sub-domain and potentially link to it, then you're probably going to have to use cross-domain canonical. That's not an ideal solution, though - ideally, the CDN should be invisible to Google and visitors.

[Keszi]

Hi Godad,

If it was me I would go for the canonical version.

if you want to go with the no-index, then do not forget to use no-index, follow (so you do not miss the "link juice" those pages might get).

I hope it helped,

Istvan