What is a reverse DNS record?

Reverse Domain Reverse (DNS) is a DNS function that allows you to convert the address of the Internet protocol (IP) to the domain name. This is, unlike the widely used DNS, which converts the domain of a readable person into a number of numbers that you understand the software on the web. For both types of searching, separate records are stored and have different uses. DNS reverse records can be used for network or anti-Spam problems, but are usually not associated with viewing the web.

DNS connects domain names readable people with IP addresses used by web browsers and other software. Millions of computers around the world store and exchange DNS recordings and create an internet equivalent of the global phone book. In most cases, the system is used to convert a web address or a domain name such as.com, to an IP address such as 192.0.32.10. This event is also known as DNS search. Reverse DNS recording is used to do the opposite action: convertedThe well -known IP addresses in the domain name.

DNS uses separate DNS search records and less common reverse search; Examples.com may point to 192.0.32.10 at a handover search, but 192.0.32.10 does not necessarily point back on example.com when searching. In the technical jargon, the reverse DNS record is known as the "PTR) (PTR), while the front record is known as" Address "(A) Record. The first is often maintained by the Internet service provider (ISP) or webhosting company, while the domain owner is responsible for the second. PTR may also contain items for both IPv4 addresses, as used in the above examples or addresses from the latest IPv6.

DNS reverse record is most commonly used to eliminate problems, system monitoring and anti-Spam. Some domains may miss this type of record because the non -cooker on the web browseHO other types of internet traffic. Vintage network tools, such as Traceeroute and Ping, use reverse DNS records, as well as many business management tools and network backups. Many anti-spam tools examine PTR domains when evaluating an incoming e-mail and can block messages that seem to come from domains with mismatch or those commonly associated with low ISP quality. On the contrary, a reverse DNS record that corresponds to its forward DNS cousin can be a strong indicator of a legitimate domain and many e -mail instruments are more likely to receive news from domains with such a match.