only main Subdomain redirect to main domain through .htaccess

Question

I want to redirect only main subdomain like http://dl.domain.com to domain.com

but not redirect files or script links to main domain.

http://dl.domain.com/123.zip http://dl.domain.com/zippy.zip etc

How I can do this with .htaccess rules?

I use these .htaccess rules but problem not solve

RewriteCond %{HTTP_HOST} ^(www\.)?subdomain\.domain\.com$ [NC]
RewriteRule !^xyz\.php($|/) http://www.domain.com%{REQUEST_URI} [NE,R=301,L]

Answer 1

You can use:

RewriteCond %{HTTP_HOST} ^(www\.)?subdomain\.domain\.com$ [NC]
RewriteRule ^/?$ http://www.domain.com [R=301,L]