apache - redirect all wildcard subdomains to root domain

Question

Okay, I have done a fair amount of searching but still can't find something specific enough to handle my problem.

Right now I have a DNS record that redirects all other subdomains to my server. What I'm asking is what would make example.mydomain.com return HTTP/1.1 301 and redirect to just mydomain.com

My apologies if this has been covered, I just couldn't find anything specific enough.

Answer 1

Use a RewriteCond to match domains other than mydomain.com and 301 redirect them:

RewriteEngine On
# If the domain (any domain) is not exactly mydomain.com...
RewriteCond %{HTTP_HOST} !^mydomain.com$ [NC]
RewriteRule (.*) http://mydomain.com/$1 [L,R=301,QSA]

You can also look more specifically for subdomains of mydomain.com. The one above would match any other domain.

# Match only subdomains of mydomain.com
RewriteCond %{HTTP_HOST} ^(.+).mydomain.com$ [NC]
RewriteRule (.*) http://mydomain.com/$1 [L,R=301,QSA]