DNS cache poisoning: Explanation
DNS cache poisoning, also known as DNS spoofing, is an attack that occurs when malicious or false data is inserted into a DNS cache server. This data corrupts the data stored in the server, causing it to respond to requests for a domain name with the wrong IP address. In other words, valid DNS requests that are received by a corrupted server will be answered with incorrect information, such as sending a user to the wrong website or to a malicious one. DNS spoofing is dangerous because it can manipulate information on the Internet allowing criminals to commit cybercrimes. It can also be used to redirect web traffic to sites that contain malicious software, leading to data breaches and other security threats.
DNS DNS records Network
, AAAA record
, DNS lookup
, Domain name
, Domain Name System
, Internet Protocol
, IP address
, PTR record
, Reverse DNS
Reverse DNS is an absolutely beneficial instrument for every business. It will convert the IP address into the domain name. But what makes you think you’d want that? Let’s take a closer look at Reverse DNS to comprehend it better.
PTR record – definition
The PTR is a DNS record type that we use for Reverse DNS to connect IP addresses (both IPv4 and IPv6) to the domain name. For example, when receiving mail servers want to know where an email came from, they execute a rDNS lookup and seek for PTR records. The PTR records will ensure that the IP address is actually associated with the domain name.
The purpose of Reverse DNS
Reverse DNS, also known as rDNS, is a querying technique used by DNS (Domain Name System) to do a particular sort of query with an IP address (IPv4 or IPv6) as an input and a name record as an output (A record or AAAA record). It’s termed reverse because it works in the same way as a forward DNS lookup, which connects an IP address to a domain name.
If you wish to check a specific host, you can use rDNS. Each host connected to a network has an IP address as an identification. You can readily see the IP address, but you can also execute a reverse DNS lookup to view the domain name and decide whether or not to trust it.
Check out the different Reverse DNS service plan possibilities.