Apache redirect all non valid wildcard subdomains to root domain

Question

Is it possible to redirect all 404 subdomain result to the root domain in apache2? Im using a wildcard subdomain entry in my DNS provider, and apache is set to fetch the site in the folder with the same name as the subdomain. But I would also like it to be able to redirect its self to the root domain if there is no folder.

NameVirtualHost *:80

# Root domain
<VirtualHost *:80>
        ServerName example.com
        ServerAlias www.example.com
        DocumentRoot /var/www/example.com/public
</VirtualHost>

# Wildcard subdomains
<VirtualHost *:80>
        ServerAlias *.example.com
        VirtualDocumentRoot /var/www/%0/public
        # Redirect to root if `$0` folder doesn't exist
</VirtualHost>

Do you want to redirect to a specific URL in www.example.com ? — Gerard H. Pille, May 16 '20 at 13:23
@GerardH.Pille Yeah %0 is valid inside `VirtualDocumentRoot`. And no just to the root would be great. For example, I might have a valid site `a.example.com`, but if someone goes to `b.example.com` I want them to be redirected to `example.com` — Mr. Simmons, May 17 '20 at 14:29

Gerard H. Pille · Accepted Answer · 2020-05-17T15:49:16.457

1

Let's rewrite when the folder isn't there

# Redirect to root if `$0` folder doesn't exist
RewriteEngine on
RewriteCond /var/www/%{SERVER_NAME}/public/ !-d
RewriteRule . http://www.example.com/ [R=301,L]

I tried using DOCUMENT_ROOT, but didn't succeed

# RewriteCond %{DOCUMENT_ROOT} !-d

edited May 17 '20 at 15:49

answered May 17 '20 at 15:43

Gerard H. Pille

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Awesome thank you! That works perfectly. I also had to enable the rewrite mod using `sudo a2enmod rewrite`. So just in case anyone else has this issue, they know how to enable it. Thanks again! – Mr. Simmons May 19 '20 at 00:38

Apache redirect all non valid wildcard subdomains to root domain

1 Answers1