How can I disable WordPress RSS feed, like http://www.domain.com/blog/feed and redirect to my home page
You can simply add following codes to your theme’s functions.php file
function custom_disable_feed() {
wp_redirect("/");
}
add_action('do_feed', 'custom_disable_feed', 1);
add_action('do_feed_rdf', 'custom_disable_feed', 1);
add_action('do_feed_rss', 'custom_disable_feed', 1);
add_action('do_feed_rss2', 'custom_disable_feed', 1);
add_action('do_feed_atom', 'custom_disable_feed', 1);
add_action('do_feed_rss2_comments', 'custom_disable_feed', 1);
add_action('do_feed_atom_comments', 'custom_disable_feed', 1);