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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.
The latter two servers largely mitigated the damage by distributing requests to other root server instances with anycast addressing. ICANN published a formal analysis shortly after the event. [3] Due to a lack of detail, speculation about the incident proliferated in the press until details were released. [4]
The Internet Software Consortium produced a version of the BIND DNS software that can be configured to filter out wildcard DNS records from specific domains. Various developers have produced software patches for BIND and for djbdns. Other DNS server programs have followed suit, providing the ability to ignore wildcard DNS records as configured.
Although DNS technically supports AXFR over User Datagram Protocol (UDP), it is considered not acceptable due to the risk of lost, or spoofed packets. [2] [1] The server responds with a series of response messages, comprising all of the resource records for every domain name in the "zone". The first response comprises the SOA resource record ...
Domain Name System blocking, or DNS blocking / filtering, is a strategy for making it difficult for users to locate specific domains or websites on the Internet.It was first introduced in 1997 as a means to block spam email from known malicious IP addresses.
The higher up the DNS resolution chain the sinkhole is, the more requests will fail, because of the greater number of lower nameservers that in turn serve a greater number of clients. Some of the larger botnets have been made unusable by top-level domain sinkholes that span the entire Internet. [ 3 ]
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 is a list of notable managed DNS providers in a comparison table. A managed DNS provider offers either a web-based control panel or downloadable software that allows users to manage their DNS traffic via specified protocols such as: DNS failover, dynamic IP addresses, SMTP authentication, and GeoDNS.