Hello Miguel,
Sorry for late reply to this,
Do you mean that you would like your guest user can view the stream from your Easysocial and able to access the blog post.
If yes, that was possible to do that, make sure that your Easyblog frontpage menu item is set to public.
If the guest still not able to access it, can you provide us with your Joomla backend so we can help you configure with this? Please advise.