FAW block the communication with fastpixel CDN

You can use the .htninja optional script: https://blog.nintechnet.com/ninjafirewall-wp-edition-the-htninja-configuration-file/

<?php
/*
 +===========================================================================================+
 | NinjaFirewall optional configuration file                                                 |
 |                                                                                           |
 | See: https://blog.nintechnet.com/ninjafirewall-wp-edition-the-htninja-configuration-file/ |
 +===========================================================================================+
*/

$ip_array = ['23.88.6.90' , '136.243.103.55' , '176.9.77.187', '5.161.48.189'];
if ( in_array( $_SERVER["REMOTE_ADDR"], $ip_array ) ) {
   define('NFW_UWL', true);
   return 'ALLOW'; // whitelist
}

Thanks for the quick response and help!

Just to make sure I understand correctly, because currently the file named “.htaccess.ninja1731118484” is practically a copy of the contents of the original htaccess file.

Should I copy this php snippet to the top of the file and leave everything else in there, or is there some other method?

The file name is .htninja , not .htaccess. The .htaccess.ninja1731118484 you see is a backup of your original .htaccess . If your site works as expected, you can delete that backup file.
The .htninja file is a PHP file. Just paste the above code into it.