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For example, to do a reverse lookup of the IP address 8.8.4.4 the PTR record for the domain name 4.4.8.8.in-addr.arpa would be looked up, and found to point to dns.google. If the A record for dns.google in turn pointed back to 8.8.4.4 then it would be said to be forward-confirmed.
The IP address returned by the DNS lookup is tied to the client's location. [2] For example, a website might have 2 servers, one located in France and one in the US. With GeoDNS it's possible to create a DNS record for which clients from Europe would get the IP address of the French server and clients from the US would get the American one.
Although Microsoft's DNS Server had a mechanism for properly dealing with cache pollution, the mechanism was turned off by default. [4] In 2004, a common problem involved the feature of the Windows Server 2003 version of Microsoft's DNS server to use EDNS0, which a large number of firewalls could not cope with. [5]
A reverse DNS lookup is a query of the DNS for domain names when the IP address is known. Multiple domain names may be associated with an IP address. The DNS stores IP addresses in the form of domain names as specially formatted names in pointer (PTR) records within the infrastructure top-level domain arpa. For IPv4, the domain is in-addr.arpa.
For example, to find the domain name associated with the IP address 203.0.113.22, one would send a PTR query for 22.133.0.203.in-addr.arpa. Misconfigured hosts [5] often send reverse DNS queries for private addresses to the public DNS. The public DNS cannot meaningfully respond to these queries, since these addresses are reserved for private ...
In its simplest implementation, round-robin DNS works by responding to DNS requests not only with a single potential IP address, but with a list of potential IP addresses corresponding to several servers that host identical services. [2] [3] The order in which IP addresses from the list are returned is the basis for the term round robin.
In 2016, GoDaddy did not advertise during the Super Bowl for the first time in over a decade, [51] but returned in 2017 with their "The Internet Wants You" campaign. [52] In 2025, GoDaddy returned to Super Bowl advertising for the first time in eight years with a commercial promoting their AI service Airo starring actor Walton Goggins. [53] [54]
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.