Ensure firewall is installed, configured, and working
user@pihole:~ sudo apt install ufw -y
user@pihole:~ sudo ufw allow from 10.0.0.0/8 to any port 22 proto tcp
user@pihole:~ sudo ufw allow from 192.168.0.0/16 to any port 22 proto tcp
user@pihole:~ sudo ufw allow from 10.0.0.0/8 to any port 80 proto tcp
user@pihole:~ sudo ufw allow from 192.168.0.0/16 to any port 80 proto tcp
user@pihole:~ sudo ufw allow from 10.0.0.0/8 to any port 443 proto tcp
user@pihole:~ sudo ufw allow from 192.168.0.0/16 to any port 443 proto tcp
user@pihole:~ sudo ufw allow from 10.0.0.0/8 to any port 53 proto tcp
user@pihole:~ sudo ufw allow from 192.168.0.0/16 to any port 53 proto tcp
user@pihole:~ sudo ufw allow from 10.0.0.0/8 to any port 53 proto udp
user@pihole:~ sudo ufw allow from 192.168.0.0/16 to any port 53 proto udp
user@pihole:~ sudo ufw allow from 127.0.0.0/8 to any port 4711 proto tcp
user@pihole:~ sudo systemctl enable ufw
user@pihole:~ sudo systemctl start ufw
user@pihole:~ sudo ufw status numbered