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  2. Internet outage - Wikipedia

    en.wikipedia.org/wiki/Internet_outage

    DNS TLD Outage: Worldwide: 50,000,000: An Ingres database failure resulted in corrupt .com and .net zones, which were subsequently released to the DNS root servers. As the root servers were reloaded, they began to return failures for all domains in the .com and .net zones. [29] [30] 4 hours: DNS: Automation and Human Failure: InterNIC / Network ...

  3. DNS blocking - Wikipedia

    en.wikipedia.org/wiki/DNS_blocking

    Google's chairman, Eric Schmidt, is quoted saying "I would be very, very careful if I were a government about arbitrarily [implementing] simple solutions to complex problems" in reference to DNS blocking and the PIPA bill. [6] Experts claim that users could get around DNS blocking by using foreign search engines and foreign DNS servers.

  4. DDoS attacks on Dyn - Wikipedia

    en.wikipedia.org/wiki/DDoS_attacks_on_Dyn

    As a DNS provider, Dyn provides to end-users the service of mapping an Internet domain name—when, for instance, entered into a web browser—to its corresponding IP address. The distributed denial-of-service (DDoS) attack was accomplished through numerous DNS lookup requests from tens of millions of IP addresses. [ 6 ]

  5. Distributed denial-of-service attacks on root nameservers

    en.wikipedia.org/wiki/Distributed_denial-of...

    However, in practice, the root nameserver infrastructure is highly resilient and distributed, using both the inherent features of DNS (result caching, retries, and multiple servers for the same zone with fallback if one or more fail), and, in recent years, a combination of anycast and load balancer techniques used to implement most of the ...

  6. 2021 Facebook outage - Wikipedia

    en.wikipedia.org/wiki/2021_Facebook_outage

    Major DNS resolvers returning "SERVFAIL" status for Facebook.com. Security experts identified the problem as a Border Gateway Protocol (BGP) withdrawal of the IP address prefixes in which Facebook's Domain Name System (DNS) servers were hosted, making it impossible for users to resolve Facebook and related domain names, and reach services.

  7. Domain Name System blocklist - Wikipedia

    en.wikipedia.org/wiki/Domain_Name_System_blocklist

    A Domain Name System blocklist, Domain Name System-based blackhole list, Domain Name System blacklist (DNSBL) or real-time blackhole list (RBL) is a service for operation of mail servers to perform a check via a Domain Name System (DNS) query whether a sending host's IP address is blacklisted for email spam. [1]

  8. Domain Name System - Wikipedia

    en.wikipedia.org/wiki/Domain_Name_System

    A DNS name server is a server that stores the DNS records for a domain; a DNS name server responds with answers to queries against its database. The most common types of records stored in the DNS database are for start of authority ( SOA ), IP addresses ( A and AAAA ), SMTP mail exchangers (MX), name servers (NS), pointers for reverse DNS ...

  9. Country code top-level domain - Wikipedia

    en.wikipedia.org/wiki/Country_code_top-level_domain

    Bangladesh: Bangladesh: For individuals, registrant must have a valid NID. For companies, registrant must have company or trademark registered in Bangladesh. Yes: No: Yes: 20 May 1999.be Belgium: Belgium: Used for YouTube-related domains. Also unofficially used in the Canton of Bern, Switzerland. DNS Belgium: Latin [9] Yes: Yes: Yes [10] 5 ...