A WordPress site is being hammered by bots from a number of IP addresses. The URL is https://example.com/product/something/#comment-1804 but there is no such comment. I am not even sure why someone is doing this apart from a DOS attempt, but it is a pretty low level site that doesn't have many visitors.
I am trying to force anyone coming to that URL to a 403 page with this to reduce resource and bandwidth usage.
RewriteEngine On
RewriteCond %{REQUEST_URI} comment-1804
RewriteRule ^ - [F] [END]
</IfModule>
...and the WordPress rules.
But simple as it is, it isn't working. If I create an error e.g. %{REQUEST_URI}comment-1804
it breaks the site i.e. the rewrite condition is being read.
What is the problem?
I discovered that this will never work. The fragment of the URL following a #
isn't processed in .htaccess
Perhaps this is a trick being used by bots to avoid being blocked in .htaccess.