PowerDNS is a popular free DNS server that usually uses MySQL as the back-end and PowerAdmin as a web front-end.

http://docs.solusvm.com/powerdns

http://plone.lucidsolutions.co.nz/linux/dns/viridian-a-centos-based-power-dns-pdns-dns-server-with-poweradmin-web-frontend

There is a package for the PowerAdmin web front-end, but don't use it.

Add filewall rules for:

On CentOS:

vi /etc/sysconfig/iptables

-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -m state --state NEW -p udp --dport 53 -j ACCEPT
-A INPUT -m state --state NEW -p tcp --dport 53 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT

service iptables restart