Reverse DNS is a service that associates IP addresses with domain names. 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.
ClouDNS提供的反向DNS服务是针对IP网络所有者和运营商的高级DNS服务，不包括在免费计划中。反向DNS托管是一项业务级服务，支持IPv4和IPv6反向DNS区域。
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DDoS Protected L $39.95/月 |
DDoS Protected M $11.95/月 |
Premium L $14.95/月 |
Premium M $4.95/月 |
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|---|---|---|---|---|
| 反向DNS: | ||||
| ? DNS域: | 400 | 50 | 400 | 50 |
| ? DNS记录: | 20,000 | 2,000 | 20,000 | 2,000 |
| ? 每月的DNS查询: | 无限 | 200M ? | 无限 | 200M ? |
| ? DDoS防御: | - | - | ||
| 更多细节 | 更多细节 | 更多细节 | 更多细节 | |
| 立即购买 | 立即购买 |
网络运营商是一项艰巨的工作。你有很多事情要做。反向DNS是您可以简单地移动到ClouDNS并将您从支持多个DNS服务器的授权DNS的任务中解放出来的东西。有了我们，您可以完全自由地从网络中移出DDoS攻击最多的UDP服务—DNS。
该服务对于管理自己的邮件服务器的管理员非常有用。发送传出电子邮件的IP地址必须存在反向DNS。原因是Internet上的许多邮件服务器配置为拒绝来自任何没有反向DNS(rDNS)的IP地址的传入邮件。
*IETF (Internet Engineering Task Force) 标准建议每一个域必须能够做Reverse DNS查找。 了解更多
ClouDNS提供的反向DNS托管构建在AnycastDNS网络上，该网络可从世界上任何位置提供最大可能的速度和安全性。
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为IPv4 反向DNS域提供主要和备用DNS。支持的网络范围是:
/24 - 255 IP地址
/25 - 128 IP地址
/26 - 64 IP地址
/27 - 32 IP地址
/28 - 16 IP地址
/29 - 8 IP地址
/30 - 4 IP地址
/31 - 2 IP地址
/32 - 1 IP地址
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.
每个网络范围（IP阻止列表）都需要配置一个DNS区域。例如，如果您有/22 IPv4网络范围，则需要为每个/24子网络将其划分为4个DNS区域。可以配置到DNS区域的PTR记录数量没有限制。
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.
我们的托管DNS服务在自主开发的系统下运行，在网络中的所有数据中心上进行即时DNS传播。基于web的控制面板允许我们的客户实时监控在所有数据中心的传播。您可以随时检查任何域名每个数据中心的更新状态。结合lowTTL值（低至1分钟），我们的客户可以更快地部署任何更改，而无需宕机时间。
如果您需要一个定制化报价，额外的域或设置一个品牌化的DNS服务，请点击此按钮并填写表格！