I am using apache + nginx (for serving static content) and just bought a CDN. I have added a CNAME entry to my CDN URL, which should be cdn.example.com and pointing to the original cdn url. xxx.netdna-cdn.com/
But probably because of my nginx vhost file when I run cdn.example.com, it opens the first server entry site in my vhost file.
I have multiple sites in my server. I have added CNAME from CPanel DNS editor as well.
No luck, so I think I need to add something in the vhost.conf.