This article will guide you on steps to mitigate this #NTP amplification attack. An Amplification Attack is any attack where an attacker is able to use an amplification factor to multiply its power. Examples of #amplification #attacks include Smurf Attacks (ICMP amplification), Fraggle Attacks (#UDP amplification), and DNS Amplification.
DNS flood is a type of Distributed Denial of Service (#DDoS) attack in which the attacker targets one or more Domain Name System (#DNS) servers belonging to a given zone, attempting to hamper resolution of resource records of that zone and its sub-zones.
To harden your DNS server:
1. Audit your DNS zones. First things first.
2. Keep your DNS servers up-to-date.
3. Hide BIND version.
4. Restrict Zone Transfers.
5. Disable DNS recursion to prevent DNS poisoning attacks.
6. Use isolated DNS servers.
7. Use a DDOS mitigation provider.
8. Two-Factor Authentication.