DNS Security - 1st EditionThe Domain Name System DNS is a hierarchical and decentralized naming system for computers, services, or other resources connected to the Internet or a private network. It associates various information with domain names assigned to each of the participating entities. Most prominently, it translates more readily memorized domain names to the numerical IP addresses needed for locating and identifying computer services and devices with the underlying network protocols. By providing a worldwide, distributed directory service , the Domain Name System has been an essential component of the functionality of the Internet since The Domain Name System delegates the responsibility of assigning domain names and mapping those names to Internet resources by designating authoritative name servers for each domain. Network administrators may delegate authority over sub-domains of their allocated name space to other name servers.
How a DNS Server (Domain Name System) works.
It delivers the accessibility and connectivity we all take for granted, while acting as a cornerstone for all online activity. This is precisely why DNS has become a significant attack vector used by bad actors. Coupled with the proliferation of devices and a disappearing perimeter, malware is as likely to originate from inside the firewall as outside it. And data can just hitch a ride out of your network via DNS. This e-book is designed to help, and covers a variety of DNS fundamentals, including:.