index.php 301重定向不适用于Joomla站点

I tried below code in .htaccess with my Joomla site but it is not working at all:

Redirect 301 /index.php /

I also tried:

Redirect 301 www.domain.com/index.php www.domain.com/

Basically I don't want to have duplicate pages and currently I can view the home page with index.php and without.

I have no idea why Joomla does this but it's not working at all. I've also done 301 redirect under Artio SEO component but it doesn't work either.

Try this:

<IfModule mod_rewrite.c>
  RewriteEngine on

  RewriteCond %{THE_REQUEST} ^.*/index.php
  RewriteRule ^(.*)index.php$ "http\:\/\/www\.yourdomain\.com\/$1" [R=301,L]
</IfModule>