I participated in a CTF last year that had the following .htaccess file:
RewriteEngine On
RewriteCond %{THE_REQUEST} filename
RewriteRule ".*" "-" [F]
And asked to request the resource http://website.com/folder/filename.txt. I think I've replicated the environment and still can't solve the problem. I've tried url encoding and content-disposition. I feel like the solution is straight forward but it still eludes me.
URL encoding example:
/folder/%66ilename.txt
If anyone can help me, or can find the writeup of last years French CTF, I would very much appreciate it. It was a problem that many people solved and I got stumped on.