Category: RDAP

Governance Models for Open Public RDAP Repositories

The Registration Data Access Protocol (RDAP) was designed to address the limitations of the legacy WHOIS system by introducing structured, secure, and extensible access to registration data for domain names, IP addresses, autonomous system numbers, and related resources. As RDAP becomes more entrenched in the global internet infrastructure, the idea of open public RDAP repositories—centralized…

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Real-World Latency Measurements Across RDAP Networks

The Registration Data Access Protocol (RDAP) has become the standard for accessing domain name and internet number registration data in a secure, structured, and standardized format. While RDAP’s design emphasizes data normalization, access control, and modern transport mechanisms, one of the most operationally significant aspects for end users and applications is latency—the time it takes…

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SAML vs OAuth2 for Federated RDAP Identity

The Registration Data Access Protocol (RDAP) was developed to provide secure, structured, and extensible access to domain name and IP registration data, replacing the outdated and inconsistent WHOIS protocol. One of RDAP’s most powerful capabilities is its support for differentiated access, where the amount and type of data returned in a response can vary depending…

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Licensing Models for Commercial RDAP Data Distribution

The Registration Data Access Protocol (RDAP) was introduced as a modern replacement for the WHOIS protocol, providing a structured and standardized way to access internet registration data related to domain names, IP addresses, and autonomous system numbers. While RDAP itself is an open protocol governed by specifications defined by the IETF and managed in practice…

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Using RDAP to Track IP Address Block Reallocations

The Registration Data Access Protocol (RDAP) has become an essential tool for accessing and analyzing the allocation and management of IP address resources across the internet. One of its most practical applications lies in tracking IP address block reallocations—instances where previously allocated IP ranges are transferred, delegated, or reassigned from one organization to another, either…

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Understanding the RDAP Data Model and JSON Schema

The Registration Data Access Protocol (RDAP) represents a fundamental evolution in how internet registration data is accessed and represented, particularly replacing the older WHOIS protocol with a more structured, secure, and standardized approach. Central to RDAP’s effectiveness is its data model and the associated JSON schema, which dictate not only how data is organized but…

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Authentication and Authorization Mechanisms in RDAP

The Registration Data Access Protocol (RDAP) was designed not only to provide a structured and standardized method for querying internet registration data but also to address longstanding limitations in the WHOIS protocol, particularly in the areas of authentication and authorization. WHOIS traditionally offered no native support for user identification or differentiated access, resulting in open…

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Handling RDAP Error Codes and Problem Reports

In the context of the Registration Data Access Protocol (RDAP), the proper handling of error codes and problem reports is an essential component of building a reliable, user-friendly, and standards-compliant service. Unlike its predecessor WHOIS, which provided unstructured textual responses and offered little to no guidance when queries failed, RDAP is built on top of…

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Leveraging RDAP for Threat Intelligence Enrichment

In the evolving landscape of cybersecurity, the ability to enrich threat intelligence with contextual, authoritative, and machine-readable data is critical to understanding and mitigating malicious activity. The Registration Data Access Protocol (RDAP) serves as a powerful tool in this domain, offering a modern, structured, and extensible replacement for WHOIS that is particularly well-suited for threat…

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Integrating RDAP Outputs into SIEM Workflows

The integration of Registration Data Access Protocol (RDAP) outputs into Security Information and Event Management (SIEM) workflows represents a critical advancement in modern cybersecurity operations. As SIEM platforms are tasked with aggregating, correlating, and analyzing vast quantities of log and event data across an enterprise environment, the ability to enrich this data with contextual information…

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