RewriteEngine on

RewriteRule ^intranet/Upload/(.*)/?$ intranet/index.php?module=Upload&action=$1

RewriteCond %{REQUEST_URI} !^/intranet/Upload/(.*)/?$
RewriteRule ^intranet/?(.*)$ http://10.37.111.12/$2
RewriteRule ^intranet/index.php(.*)$ http://10.37.111.12/$1 [L]