Resolved Not seeing X-Robots-Tag from .htaccess

[SlimDeluxe]

Server operating system version

Ubuntu 20.04

Plesk version and microupdate number

Obsidian 18.0.55

Hi,
I have the following in .htaccess:

<Files ~ "\.pdf$">
  Header set X-Robots-Tag "noindex, nofollow"
</Files>

This works fine in local development. I can see the header.
However, when in production, the header is not there. Please see attached image.

What is the reason behind this and how can I fix this?

I checked the Logs and there's no error when accessing a PDF file, so I suppose there's no problem with the .htaccess directive. It's just ignored. Other directives from the same .htaccess work ok.

Any help would be appreciated.

 

[SlimDeluxe]

Ah, sorry, I forgot that this is served by nginx.
The solution is to set this custom nginx directive in "Additional nginx directives" under Hosting settings for the domain.

location ~* \.pdf$ {
    add_header X-Robots-Tag "noindex, nofollow";
}