Use the command yum install bind bind-utils to install the necessary DNS server packages on CentOS 7.
Edit the /etc/named.conf file to define your DNS zones, including forward and reverse lookup zones.
Create the forward and reverse lookup zone files in the /var/named/ directory. Use templates for the zone files, such as db.example.com.
Ensure the correct ownership and permissions for the zone files by setting them to named:named using the chown command.
Start the DNS server using systemctl start named and enable it to start on boot with systemctl enable named.
Use the command firewall-cmd --permanent --add-service=dns and firewall-cmd --reload to allow DNS traffic through the firewall.
Use the dig or nslookup commands to test and verify that your DNS server is working correctly by resolving domain names.