Difference between forward and reverse lookup dns query
This cookie is set by GDPR Cookie Consent plugin. Set by the GDPR Cookie Consent plugin, this cookie is used to record the user consent for the cookies in the "Advertisement" category. These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. We recommend that you check the possibility of setting up reverse DNS with your DNS hosting solution. In case of hosting several domains on a single mail server, it is enough to configure the reverse DNS to point to the domain name considered as the main one (mail servers checking the reverse DNS recognize that it is normal to host many domains on a single IP address and that it would be impossible to list all these domains in the reverse DNS for IP). Regardless of the address to which the reverse DNS record of the IP address points, a reverse DNS record is expected.
For those who manage their own mail server, reverse DNS must exist for the IP address from which the outgoing e-mail is sent. Many mail servers on the Internet are configured to reject incoming mail from any IP address that does not have reverse DNS. However, Reverse DNS is important for one particular application: the e-mail system. It is usually not as critical as the classic DNS, visitors will reach the website even without the presence of reverse DNS for the IP of the web server or the IP of the visitor. Reverse DNS is mainly used to track the origin of a website visitor, the origin of an e-mail message, etc. This construction enables to operate a classic DNS resolution on a domain name with a “.arpa” extension. The principle is the same for IP v4 and v6 addresses according to the following construction:Įx: IPv4: 11.80.92.81.in-addr.arpa. arpa and points to the required destination. To perform DNS resolution, the IP address to be queried is configured in the reverse zone with the suffix. The resolution system is constructed in a similar way to the classic resolution. Reverse DNS PTR: we know an IP address and we want to retrieve the name of the site.Classic DNS: Record A: we know the name of a site and we want to obtain its IP address….Reverse DNS operates by creating a reverse DNS zone in which DNS PTR records (for Pointer Record) will be configured. The reverse DNS allows to answer the question: I have an IP address, what is the FQDN related to it? This is the exact opposite of the classic use of DNS, which associates domain names to IP addresses. Reverse DNS allows you to resolve from an IP address to an FQDN. Reverse DNS is often unknown to domain name managers, especially when the names are hosted by major hosting companies.