Question about shared accounts/addon domains

[sren]

Hi everyone.
I have a shared account with some hosting provider.
Only one Cpanel-X managing my main domain and my addon domain (recently added), which is my second website.
I'm noticing that I can access my addon domain by newsite.com and also by newsite_folder.mainsite.com, and again mainsite.com/newsite_folder. That's 3 ways!
I've been reading some explanations and it seems that it's a normal thing since many many people uses shared accounts like that. But I'm still worried.

My question would be if I should get worried about duplicates on search engines.

Thanks for any advices.

[Quadrille]

I wouldn't worry about the cp URL; I doubt that gets picket up by SEs, as it's confidential stuff behind https (I hope!).

What matters is your site's URLs - and they should be kept to a minimum.

If you cannot rejigg the CP to get just one URL, then use robots text to block dupliacte clasees of content.

[sren]

Thanks Quadrille.
So, cp URL is mainsite.com/newsite_folder?

[Quadrille]

Looks that way - but every host has their own way of doing things - just be careful! :)

[Vastio]

You could put an .htaccess in the addon's folder and specify it to use only one of those options. For instance, [mainsite.com...] and [add-on.mainsite.com...] can both do a 301 redirect to [add-on.com....] That eliminates any possible confusion or duplicate content worries that you may have.

[sren]

Thanks again guys.
I would make the 301 as Vastio says. My problem is that I have no idea on how to write rewrite rules.
I just have a 301 to redirect my site.com to www.
My hosting support says that it's highly unprobable that SE crawlers ever reach my addon domain trough addon_folder.mainwebsite.com.
But it would be good to be covered against such a horrible possibility.