How to allow access to a website directory from specific IP address in Plesk?

If Reverse Proxy Server (nginx) is enabled in Tools & Settings > Services Management and PHP handled by Apache in Domains > example.com > PHP Settings:

1. Log into Plesk.

2. Open Domains > example.com > Apache & nginx Settings.

3. Disable Serve static files directly by nginx.

4. Add the following in Additional directives for HTTP/S  section, where 203.0.113.2 is the IP address from which access to a directory should be allowed.:

   CONFIG_TEXT: <Location "/exampledirectory">
   Order Deny,Allow
   Deny from all
   Allow from 203.0.113.2
   </Location>

If Reverse Proxy Server (nginx) is enabled in Tools & Settings > Services Management and PHP handled by nginx in Domains > example.com > PHP Settings, where 203.0.113.2 - IP address from which access to a directory should be allowed:

1. Log into Plesk.

2. Open Domains > example.com > Apache & nginx Settings.

3. Add the following in Additional nginx directives section:

   CONFIG_TEXT: location / {
   try_files $uri $uri/ /index.php;
   }
   location ^~ /exampledirectory {
   allow 203.0.113.2;
   deny all; location /exampledirectory/ {
   index index.php; }
   location ~ ^/~(.+?)(/.?.php)(/.)?$ { alias /var/www/vhosts/example.com/web_users/$1/$2;
   fastcgi_split_path_info ^((?U).+.php)(/?.+)$;
   fastcgi_param PATH_INFO $fastcgi_path_info;
   fastcgi_pass "unix:///var/www/vhosts/system/example.com/php-fpm.sock";
   include /etc/nginx/fastcgi.conf;
   }
   location ~ .php(/.*)?$ {
   fastcgi_split_path_info ^((?U).+.php)(/?.+)$;
   fastcgi_param PATH_INFO $fastcgi_path_info;
   fastcgi_pass "unix:///var/www/vhosts/system/example.com/php-fpm.sock";
   include /etc/nginx/fastcgi.conf;
   }
   }

If Reverse Proxy Server (nginx) is disabled in Tools & Settings > Services Management

1. Log into Plesk.

2. Open Domains > example.com > Apache & nginx Settings, where 203.0.113.2 - IP address from which access to a directory should be allowed.

3. Add the following to Additional Apache directives section:

   CONFIG_TEXT: <Location "/exampledirectory">
   Order Deny,Allow
   Deny from all
   Allow from 203.0.113.2
   </Location>