I have 5 different Multisite Installations . I want the registration of all the Multi-Site Installations(Not only sub-sites, the entire installations) as single-sign-on . So a user can login to all the sites if he/she register on one Single website.
I could use Some OAuth plugins or Single-sign-on plugins. But they still need two steps to register and login on each WordPress Site. So I would like to customize or use any plugin to do so. I know some PHP and will try to do if any body help me.
Could anybody let me know if I should do it by coding or using a plugin?
Note : I am using WordPress Installation of 3.1.1 and VPS Server of CentOS
I heard about a few options like LDAP, Cosign on etc. There are a few plugins like LDAP, CoSign SSO etc . I don't know how to make use of them . Could anybody let me know if they help me in this situation?
BTW, I have activated XAuth and I don't know how to get started with it