htaccess：404 RewriteRule不适用于特定网址

Question

这应该是一项简单的任务：为特定网址发送404重定向：/ folder1 / folder2

这是我尝试过的：

RewriteEngine on
RewriteBase /
#RewriteRule ^folder1/folder2/(.*)$ /folder1/folder2/$1 [R=301,L] (works, but I want a 404)
RewriteRule ^/?folder1/folder2 - [R=404] (does not work)
RewriteRule ^folder1/folder2 - [R=404,L] (does not work)

RewriteCond %{REQUEST_URI} ^/folder1/folder2
RewriteRule ^ - [L,R=404] (does not work)

RedirectMatch 404 folder1/folder2(.*)$ (does not work)

RewriteRule ^folder1/folder2(.*)$ /not-found.html [L,R=404] (does not work)

# This works, but is not what I need:
RewriteRule ^(.*)$ /not-found.html [L,R=404]

测试规则（http://htaccess.mwl.be/）时，它们按预期工作，但不在我的localhost上。发生了什么事？

我正在运行Apache 2.4。

感谢您的帮助！