Reverse DNS (rDNS) is a DNS service that associates IP addresses with domain names, using PTR (Pointer) records. While regular Forward DNS resolves domain names to IP addresses, Reverse DNS does the opposite. It allows you to look up the domain name associated with a given IP address, providing a way to identify the host or server corresponding with that IP address. It's commonly used for security and administrative purposes, such as verifying the authenticity of incoming email servers or identifying the origin of network traffic based on IP addresses.
Reverse DNS service provided by ClouDNS is a Premium DNS service for IP network owners and operators and it is not included in the Free plan. The Reverse DNS hosting is a business class service and supports both IPv4 and IPv6 Reverse DNS zones.
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DDoS Protected L $39.95/ماه |
DDoS Protected M $11.95/ماه |
Premium L $14.95/ماه |
Premium M $4.95/ماه |
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| Reverse DNS: | ||||
| ? منطقه DNS: | 400 | 50 | 400 | 50 |
| ? رکوردهای DNS: | 20,000 | 2,000 | 20,000 | 2,000 |
| ? DNS queries per month: | 1B ? | 150M ? | 500M ? | 150M ? |
| ? محافطت از DDoS : | - | - | ||
| More details | More details | More details | More details | |
| Buy Now | Buy Now |
Reverse DNS uses PTR (Pointer) records to map an IP address back to its associated hostname. When an application, mail server, or network service performs a Reverse DNS lookup, it queries the appropriate reverse DNS zone to retrieve the hostname linked to that IP address.
A typical Reverse DNS lookup follows these steps:
Properly configured Reverse DNS helps establish trust between systems and is commonly used by mail servers, hosting providers, and network administrators to validate connections.
Managing Reverse DNS infrastructure requires authoritative DNS servers, ongoing maintenance, and protection against DNS attacks. By outsourcing Reverse DNS hosting to ClouDNS, network operators can reduce operational overhead while benefiting from our globally distributed Anycast DNS network, high availability, and DDoS-protected infrastructure.
The service is very useful for those administrators who manage their own mail servers. Reverse DNS must exist for the IP address from which the outgoing e-mail is sent. The reason is that many mail servers on the Internet are configured to reject incoming mail from any IP address that does not have Reverse DNS (rDNS).
*Standards from the IETF (Internet Engineering Task Force) suggest that every domain should be capable of Reverse DNS lookup. Learn more
The Reverse DNS hosting provided by ClouDNS is built on Anycast DNS Network which provides the maximum possible speed and security from any location in the world.
Reverse DNS provides valuable information about IP addresses, which can be extremely beneficial for a variety of reasons. Moreover, if Reverse DNS is configured properly, it can massively enhance the overall performance and security of a network.:
Improve your email deliverability rates by configuring Reverse DNS records correctly. By doing so, it proves the authenticity of your emails.
Quickly identify and resolve issues by tracing IP addresses back to their corresponding domain names.
Detect and prevent malicious activities, such as spam, phishing, and hacking attempts, by identifying the true source of IP addresses.
Establish a positive online reputation by ensuring that your IP addresses are associated with legitimate domain names.
Setting up Reverse DNS in ClouDNS is simple and essential for ensuring your network runs smoothly. To do that follow these steps:
ClouDNS provides both Primary and Secondary DNS for IPv4 Reverse DNS zones. Supported network ranges are:
/24 - 255 IP addresses
/25 - 128 IP addresses
/26 - 64 IP addresses
/27 - 32 IP addresses
/28 - 16 IP addresses
/29 - 8 IP addresses
/30 - 4 IP addresses
/31 - 2 IP addresses
/32 - 1 آدرس IP
IPv4 Reverse DNS ensures each IP address has a corresponding PTR (Pointer) record. This mapping is crucial for services like email servers that require PTR records for domain validation and aids in network diagnostics by enabling traceable IP address logs.
ClouDNS provides both Primary and Secondary DNS for IPv6 Reverse DNS zones. The supported network ranges are from /32 to /128. With IPv6 Reverse DNS, IPv6 addresses are mapped to domain names using PTR records in the ip6.arpa domain. This is vital for managing the vast IPv6 address space efficiently and troubleshooting, ensuring each address can be resolved to its domain for security and operational needs.
Each network range (IP block list) requires one DNS zone to be configured. For example, if you have /22 IPv4 network range, you need to separate it into 4 DNS zones for each /24 sub-network. There is no limit on the number of PTR records which can be configured into the DNS zone.
DNS zones are vital for organizing PTR records for both IPv4 and IPv6 addresses. Structuring IP ranges into DNS zones allows for more efficient management of IP address resolution, ensuring quick DNS propagation and reliable domain name resolution.
Our Managed DNS service operates under self-developed system with instant DNS propagation over all data centers included in our network. The web-based control panel allows our customers to monitor the propagation over all data centers in real-time. You can check anytime for any of your domain names what is the update status for each data center. In combination with low TTL values (as low as 1 minute) our customers can deploy any changes faster without any downtime.
Managing Reverse DNS shouldn't require maintaining your own authoritative DNS infrastructure. ClouDNS provides a reliable, globally distributed Reverse DNS service designed for network operators, hosting providers, and businesses managing IPv4 and IPv6 address space.
With ClouDNS, you benefit from:
If you need a custom quote, additional zones or set up of a branded DNS service, please click the button and fill the form!
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