Support » Networking WordPress » Multisite Built-In Domain Mapping Redirects to Signup/Registration

  • I’m running a multisite network with subdomain installs. I have two sub-sites, each with their own domain. Previously, I was using the WordPress MU Domain Mapping plugin and things were working fine. However, I then found out that WordPress 4.5+ supports domain mapping out of the box and wanted one less plugin to maintain, so I thought I’d give it a shot. I inactivated the plugin, removed sunrise and followed all the steps in the article linked above (created parked domains, changed the site URLs and set the cookie domain).

    However, when I try to visit the new URL, I just get redirected to http://mydomain.org/wp-signup.php?new=subdomain with the message “Registration has been disabled.”

    Any idea what would cause this? The only thing I could think of is that I set an A record for the parked domains for the unique IP address of the main site, but that shouldn’t really make a difference since it’s a parked site, right? I’m on Dreamhost if that makes any difference.

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  • Moderator bcworkz

    (@bcworkz)

    That’s right, A records all point to the same server IP. WP sorts out what to do based on the request. I have to think there is a conflict somewhere. The question is where? If your server is running Apache, make a backup copy of your installation’s .htaccess file. Then delete all rules in this file except for the rules within the WordPress comments. If you are on nginx, do whatever the equivalent is. I don’t have nginx experience, sorry.

    If that doesn’t help, restore from the backup you made. Next deactivate all plugins and network enable only the twentyseventeen theme to force all sites to this theme. Domain requests should now work. Restore the desired themes and plugins, one at a time. When domain requests again fail, the last activated module is causing a conflict.

    I have the same question. Also on DreamHost. They refuse to discuss multisite so it’s frustrating.

    Trying to map http://www.examplesite.com/site1 to http://www.someothersite.com.

    My network works perfectly as subdirectories. When I enter the domain I want to use (not using the old mapping plugin but WP 4.9.8), the network site goes missing. Site not found.

    The network site domain is parked at DH. The main site & WP installation is at DH. I can’t figure out what’s gone off.

    This worked perfectly on the host I’m moving my installation from. I started fresh with a new WP installation because back in the day, I used sunrise.php, etc. to power my network. I’ve reviewed everything 100 times. Anyone have the clue I don’t?

    • This reply was modified 3 weeks, 4 days ago by  onomiko.
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