small issue with http redirect

Hello,

I am ranking on first page for a variety of products, however, when you click on them (Google) it takes you to xxxx.com/xxx address and it is shown as a 403 error.
When I put http:// before the xxxx.com/xxx it shows perfectly well.

Any tips on how to fix this issue?

(Using magento if it makes any difference)

Is xxxx.com your site? If yes and your web server is nginx/apache then "rewrite" may be the solution.