// Aula 1 - Configurando um "Cache-Only DNS Server"

# yum install unbound bind-utils

# sed -i '/interface: 0.0.0.0$/s/#//' /etc/unbound/unbound.conf

# sed -i 's/127.0.0.0\/8 allow/192.168.0.0\/24 allow/' /etc/unbound/unbound.conf

# unbound-control-setup 

# unbound-checkconf

# systemctl enable unbound

# service unbound start

# service unbound status

# firewall-cmd --permanent --add-service dns

# firewall-cmd --reload

# dig @localhost example.com

# dig +dnssec DNSKEY rhatcert.com