Unique Authentication System across all website/s

[CarlitoBrigante]

Hi all,

I have searched for a precise answer to this question in the forums, but while this seems a common request, no precise solution has been given yet.

What we want to do is simple. We have a forum shared by many websites; we are now adding services for registered users only also in our websites. So, for example, a registered user will be able to vote in an article, to submit a review, and so on. Of course, it wouldn't make sense to ask users to register for the forums and the websites separately, so we'd just like to use the forums' user database also within the websites.

I have seen there are many issues, first of all problems in setting cookies simultaneously for different domains. Can someone help me in some way? Any suggestion would be extremely welcome! Thank you!