I've got a problem on a new directadmin installation on Centos 8 with the x-cart 5 shopping cart app. Everything seems to be working except callbacks from the payment gateway. x-cart support says there must be a security feature or permission error on my server.
When I simulate the payment callback with this:
I get error 403 forbidden.
I previously ran everything with mod_php and mod_ruid2 on centos 6 or 7. mod_ruid2 does not work on centos 8 and I'm not familiar with php-fpm.
I have consulted a few groups on Whatsapp GB
but have not found a solution.
Any idea what could be wrong?