I've done the following:
1. Activated the Domain Mapping plugin
2. Moved the sunrise.php to wp-content
3. Added the sunrise => on line in wp-config
I tried to map a domain abanghazrul.com to abanghazrul.ialif.com but it was invalid.
I checked the DNS and it was pointing to the same IP as ialif.com
The IP points to Nginx load balancer. The wordpress multisite is on an apache behind it.