Domain Name System (DNS) services are frequently a source of vulnerability for the enterprise, and what is DNS security has turned into a developing question for many organizations. The 2018 Global DNS Threat Report from EfficientIP, a supplier of DNS security services, discovered that more than seventy-five percent (75%) of companies were liable to a DNS attack. The worldwide average cost per DNS attack increased by 57% year-on-year, standing at $715,000.
Distributed Denial of Service (DDoS) has DNS as a target for frequent attacks. DNS security can be easily overpowered by a simple attack, making DNS servers go offline and keeping users from finding the website, since many companies use a few DNS servers and don’t have any clue on what is DNS security.
DNS falls into a classification of "utility protocols" that support communication on the Web. These are strong protocols that help keep traffic streaming and servers communicating and that most users don't know exist. Protocols like the Border Gateway Protocol, Network Time Protocol, and of course DNS are critical to keeping the Internet up and running, however for the most part fall outside the domain of security teams. The administrators who do design and deal with the frameworks that run these protocols do not usually consider what is DNS security concerns natural in these protocols.
What is DNS security to them should be at the front line of each discussion about network security. DNS attacks are more typical than most people realize and lapses in DNS security can be devastating to an organization. DNS attacks are common, yet they are not really getting the consideration they deserve.
Standard DNS queries open doors for DNS exploits such as DNS capturing. These attacks can divert a site's inbound traffic to a fake duplicate of the site, gathering sensitive user information. One of the best-known approaches to secure against DNS threats is to adopt the DNS Security Extensions (DNSSEC) protocol.
Like many internet protocols, the DNS system was not planned in view of security and contains few design restrictions. These limitations, combined with advances in technology, have made it easy for cybercriminals to hijack a DNS lookup for malicious purposes, such as sending a user to a fake site that can distribute malware or gather individual data.
The DNSSEC are security protocols made for this issue. DNSSEC protects against attacks by digitally signing data to help guarantee its legitimacy. In order to ensure a secure lookup, the signing must occur at each level in the DNS security lookup process. This signing process is similar to someone signing a legal document with a pen; these digital signatures guarantee that data has not has not been altered.
While enhanced DNS security is favored, DNSSEC intended to be in reverse to ensure that conventional DNS lookups still resolve correctly, albeit without the added security. DNSSEC is meant to work with other security efforts like SSL/TLS as part of a holistic Internet security strategy.
An operator of a DNS zone can take further measures to secure their servers. Over-provisioning infrastructure is one simple methodology to defeat DDoS attacks.
Anycast routing is another helpful tool which can disrupt DDoS attacks. It enables various servers to share a single IP address, so regardless of whether one DNS server gets close down, there will be others up and serving. Another popular technique for securing DNS servers is a DNS firewall.
DNS resolvers can also be arranged to give security solutions for their end users. They provide features such as content filtering, which can block sites known to propagate malware and spam, and botnet protection, which blocks communication within known botnets. Many of these secured DNS resolvers are free to use and a user can change what is DNS security services applicable by changing a single setting in their local router.
In the end, what is DNS security doing is vital because a failure in DNS can render an organization totally inaccessible via the Internet. Understanding the key issues in DNS security is critical to keep up a solid security posture within an organization.