What is DNS Security?

Protecting DNS infrastructure from cyberattacks is known as domain name system (DNS) security. It guarantees the effective and dependable operation of your DNS infrastructure. This calls for implementing security technologies such as Domain Name System Security Extensions (DNSSEC), setting up redundant DNS servers, and enforcing strict DNS logging.

Cybercriminals have the ability to take over websites, steal data, or overload servers with requests, ultimately causing them to go down. The purpose of DNS security is to stop these types of attacks.

Some types of DNS attacks:  

• DNS Spoofing - Also known as cache poisoning, is an attack in which a DNS resolver's cache is filled with falsified DNS data, causing the resolver to report an inaccurate IP address for a domain. Traffic can be redirected to a malicious system or any other location the attacker chooses, either distributing malware or gathering login credentials, rather than to the intended website.
• Domain Lock-up Attack - Attackers plan a domain lock-up attack by configuring unique domains and resolvers to establish TCP connections with other trustworthy resolvers. These domains tie up the resources of the targeted resolvers by returning slow streams of random packets in response to requests.
• DNS Hijacking - In DNS hijacking, the attacker redirects queries to a different domain name server. This can be done either with malware or with the unauthorized modification of a DNS server.
• DNS Tunnelling - This attack tunnels through DNS queries and answers using other protocols. Without detection by firewalls, attackers can insert malware or stolen data into DNS queries using SSH, TCP, or HTTP.