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[Plugin: WordPress MU Domain Mapping] Sharing logins across mapped domains

  • Has anyone had luck sharing login cookies across mapped domains? If my main site is primary.com and I’ve mapped the domain secondary.com to secondary.primary.com, the logins are not shared out of the box. I think this has something to do with my configuration (Remote Login, etc), but I can’t for the life of me figure out how to set it up right. Anyone care to share their configuration where it’s working?


Viewing 7 replies - 1 through 7 (of 7 total)
  • Plugin Author Ron Rennick


    Sorry Boone, I left this one for someone else to answer & forgot about it. If you check the remote login and the redirect admin pages to original domain you should be logged into both the main network and the mapped domain.



    I have a similar problem, cookies from the primary domain are getting blocked by default IE Privacy Settings. Lowering the settings or using a different browser work well. Still looking for a solution.



    Hi Ron R.,

    I’m having trouble comprehending those Domain Options in this Domain Mapping plugin.

    Are you saying the if I check both the Remote Login and the Redirect Admin boxes that when a user logs in to any subsite, they should then be logged in to all other sites within the network?

    Hmmm … just tried this, The user exists only in the primary site. I was able to login as him to a sub site, but then following a link to another subsite in the same browser session returned the dreaded “unknown login key” white screen.

    Thanks for any insights,
    Ron S.

    Plugin Author Ron Rennick


    No, it won’t log you into all the sites at once. There are technical limitation which prevent that from being done safely/securely.

    If I understand the sales pitch, isn’t the WPMU Dev Domain Mapping able to accomplish this, though? Not that I would pay the mountly fee for that plugin, but is their implementation unsafe/insecure? I too would like this feature, but would love to understand the security implications further.

    Plugin Author Ron Rennick


    I don’t know how the wpmu dev version implementation works so I won’t comment on whether it’s safe/secure.

    @boxcarpress You may be able to get “single sign-on” for all blogs in a network by using these “free” plugins. The first one is the defacto standard for domain mapping, the second one depends on it and is “Designed to be run in concert with” the third one according to its author. GLHF!

    1. http://wordpress.org/extend/plugins/wordpress-mu-domain-mapping/
    2. http://wordpress.org/extend/plugins/sso-cross-cookie-for-multisite/
    3. http://wordpress.org/extend/plugins/ssl-subdomain-for-multisite/

    For the record I have abandoned my efforts to do this since I realized that I had more similarities than differences among my intended sub-sites on that project so I decide to make them all custom taxonomies (“galleries”) under one site. This post by Ipstenu helped clarify my thinking on this.

Viewing 7 replies - 1 through 7 (of 7 total)
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