Rewrote for clarity: I got a CentOS 7 VPS and installed ISPConfig 3. I set the nameservers for my preexisting domain to those provided by my VPS hosting, and added the domain in ISPC3. The client is not set (in the settings for the domain in ISPC3) because it's my website. However it says when trying to access my domain that the IP cannot be found. What am I doing wrong? How to do this right?
Update: I added a DNS zone as per this tutorial (sans FastHosts) but no records appeared upon its creation and I cannot set my domain's nameservers to them, won't let me.