[wp-trac] [WordPress Trac] #47630: Multisite: Admin dashboard links are malfunctioning on mapped domain

[WordPress Trac]

#47630: Multisite: Admin dashboard links are malfunctioning on mapped domain
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 Reporter:  kalico              |       Owner:  (none)
     Type:  defect (bug)        |      Status:  new
 Priority:  normal              |   Milestone:  Awaiting Review
Component:  Networks and Sites  |     Version:  5.2.2
 Severity:  blocker             |  Resolution:
 Keywords:                      |     Focuses:  administration, multisite
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Comment (by kalico):

 For what it's worth, I have started over completely from scratch: empty
 database, fresh install of WP, upgraded it to MU, and mapped a domain.
 Still having difficulties. The mapped domain doesn't do the weird admin
 redirect described above, but I can't get past the login screen.

 http://dev2.nroc.org/wp-admin

 redirects me to

 https://dev2.nroc.org/wp-login.php?redirect_to=https%3A%2F%2Fdev2.nroc.org
 %2Fwp-admin%2F&reauth=1

 and my superadmin login does not work there.

 https://wordpress.org/support/article/wordpress-multisite-domain-mapping/
 >> Map Domains in DNS

 gives this cryptic and technically inaccurate description of how to point
 mapped domains to the server.

 ''Make sure all the domains you want to use are already mapped to your DNS
 server. The additional domains should be parked upon the master domain.''

 We do have two domains resolving to our AWS server, and both of them DO
 bring up the proper website when mapped:

 dev2.nrocnetwork.org >> primary site
 dev2.nroc.org >> secondary site located at dev2.nrocnetwork.org/nroc

 But in admin it's a different story.

 dev2.nrocnetwork.org/wp-admin >> primary site dashboard (GOOD)
 dev2.nroc.org/wp-admin >> login screen (redirect described above).

 We decided to try a different DNS configuration. We changed from A record
 to CNAME as follows:

 was:

 dev2.nroc.org - A - 54.xxx.xxx.xxx

 and now:

 dev2.nroc.org - CNAME - dev2.nrocnetwork.org

 But that didn't fix the problem.

 Any help at all would be greatly appreciated. Perhaps something is missing
 from the instructions? or our server is configured wrong? I really don't
 want to go back to a domain mapping plugin if wp core has this capabilty
 built in.

 Thanks.

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Ticket URL: <https://core.trac.wordpress.org/ticket/47630#comment:2>
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