I use WordPress and I recently moved my site from the cpanel host to a Linux server with directadmin panel. Right after the transfer realized that customers have the following error when downloading via EDD plugin.
cURL error 28: Resolving timed out after 5001 milliseconds
I also got this error of w3_total_cache plugin.
Server informatin: Centos 6.8 (Final) cURL 7.54.0 (Final) directadmin