I managed to insert fontawesome iconS using Ckeditor with the Font Awesome Icons v1 module.
I just put this code in the HTML view of Ckeditor.
<i class="fa fa-camera-retro fa-lg"> </i>
The icon is shown correctly in frontend but in CKEditor it is not shown at all.
I guess I need to load all fontawesome files inside Ckeditor. How can I do this? I need to see the icon in ckeditor in the same way as I see it in frontend.
Fontawesome is located at: sites/all/libraries/fontawesome