If we try to access a non-existant Multisite site, e.g., http://site1.example.com or http://example.com/site1/, we are redirected to http://example.com/wp-signup.php?new=site1.
How to block this and instead of it show 404 error?
1 Answer
The option is in Network Admin, Settings, Network Settings, Allow new registrations
(screenshot from WordPress's Managing a Multisite Network video)
You want either "Registration is disabled" or "User accounts may be registered".
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Doesn't matter if its disabled, either way its redirects to wp-signup.php page, but just with message that registering is disabled.– SeviCommented Feb 23 at 15:40
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Huh, fair enough. Last time I used a multisite it had fixed domain names not wildcard so there was no way to trigger this.– RupCommented Feb 23 at 15:57
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1There must be a way to override that. I don't have time now but I'll have a look later.– RupCommented Feb 23 at 15:58