Linux – 404 on large application pages

We just moved to a Linux server apache cpanel vps. Some pages with a large number of images are receiving many 404 per page load. Some images are loaded, while others result in 404. Each time, the images receive errors. All the images exist and are accessible. This was not a problem in the server we just moved from. I find in apache error_log for each of these "clients rejected by the server configuration".

I suppose there is a server configuration somewhere that limits the number of requests per time period that will be accepted, but I can not find it anywhere.

Thanks John