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DNS hijacking, DNS poisoning, or DNS redirection is the practice of subverting the resolution of Domain Name System (DNS) queries. [1] This can be achieved by malware that overrides a computer's TCP/IP configuration to point at a rogue DNS server under the control of an attacker, or through modifying the behaviour of a trusted DNS server so that it does not comply with internet standards.
DNS spoofing, also referred to as DNS cache poisoning, is a form of computer security hacking in which corrupt Domain Name System data is introduced into the DNS resolver's cache, causing the name server to return an incorrect result record, e.g. an IP address. This results in traffic being diverted to any computer that the attacker chooses.
The DNS functions as the internet's phone book, translating human-friendly domain names into IP addresses that computers use to identify each other on the network. Given its role in internet architecture, securing digital namespaces and identifiers from domain name hijacking , DNS hijacking , DNS spoofing , and other forms of cyber attacks is ...
In addition to its technical impact, DNS blocking also has many social and political implications. Free speech and due process are key concerns regarding DNS blocking, particularly in the United States. DNS blocking was proposed to be mandated by the Stop Online Piracy Act (SOPA) and the PROTECT IP Act (PIPA). [4]
Domain hijacking is analogous with theft, in that the original owner is deprived of the benefits of the domain, but theft traditionally relates to concrete goods such as jewelry and electronics, whereas domain name ownership is stored only in the digital state of the domain name registry, a network of computers.
Some methods, such as the use of alternate DNS servers, use false addresses or address lookup systems to evade less sophisticated blocking tools while the user accesses the site. [1] [2] The drawback of this method is that many censors block the IP address of restricted domains in addition to the DNS, rendering the bypass ineffective. Other ...
DNS rebinding is a method of manipulating resolution of domain names that is commonly used as a form of computer attack. In this attack, a malicious web page causes visitors to run a client-side script that attacks machines elsewhere on the network.
One example of blocking malicious domains is to stop botnets, by interrupting the DNS names the botnet is programmed to use for coordination. [8] Another use is to block ad serving sites, either using a hosts file-based sinkhole [9] or by locally running a DNS server (e.g., using a Pi-hole). Local DNS servers effectively block ads for all ...