25 Extensible Provisioning Protocol (EPP)

Prototypical answer:

25.1 Introduction
Amazon EU S.à r.l.’s back-end registry operator, Neustar, has over 10 years of experience operating EPP based registries. They deployed one of the first EPP registries in 2001 with the launch of .biz. In 2004, they were the first gTLD to implement EPP 1.0. Over the last ten years Neustar has implemented numerous extensions to meet various unique TLD requirements. Neustar will leverage its extensive experience to ensure Amazon EU S.à r.l. is provided with an unparalleled EPP based registry. The following discussion explains the EPP interface which will be used for the .書籍 registry. This interface exists within the protocol farm layer as described in Question 24 and is depicted in Figure 25-1.

25.2 EPP Interface
Registrars are provided with two different interfaces for interacting with the registry. Both are EPP based, and both contain all the functionality necessary to provision and manage domain names. The primary mechanism is an EPP interface to connect directly with the registry. This is the interface registrars will use for most of their interactions with the registry.
However, an alternative web GUI (Registry Administration Tool) that can also be used to perform EPP transactions will be provided. The primary use of the Registry Administration Tool is for performing administrative or customer support tasks.
The main features of the EPP implementation are:
 Standards Compliance: The EPP XML interface is compliant to the EPP RFCs. As future EPP RFCs are published or existing RFCs are updated, Neustar makes changes to the implementation keeping in mind of any backward compatibility issues.
 Scalability: The system is deployed keeping in mind that it may be required to grow and shrink the footprint of the Registry system for a particular TLD.
 Fault-tolerance: The EPP servers are deployed in two geographically separate data centers to provide for quick failover capability in case of a major outage in a particular data center. The EPP servers adhere to strict availability requirements defined in the SLAs.
 Configurability: The EPP extensions are built in a way that they can be easily configured to turn on or off for a particular TLD.
 Extensibility: The software is built ground up using object oriented design. This allows for easy extensibility of the software without risking the possibility of the change rippling through the whole application.
 Auditable: The system stores detailed information about EPP transactions from provisioning to DNS and WHOIS publishing. In case of a dispute regarding a name registration, the Registry can provide comprehensive audit information on EPP transactions.
 Security: The system provides IP address based access control, client credential-based authorization test, digital certificate exchange, and connection limiting to the protocol layer.
25.3 Compliance with RFCs and Specifications
The registry-registrar model is described and embodied in a number of IETF RFCs, ICANN contracts and practices, and registry-registrar agreements. As shown in Table 25-1, EPP is defined by the core set of RFCs that standardize the interface that registrars use to provision domains with the SRS. As a core component of the SRS architecture, the implementation is fully compliant with all EPP RFCs.


Neustar ensures compliance with all RFCs through a variety of processes and procedures. Members from the engineering and standards teams actively monitor and participate in the development of RFCs that impact the registry services, including those related to EPP. When new RFCs are introduced or existing ones are updated, the team performs a full compliance review of each system impacted by the change. Furthermore, all code releases include a full regression test that includes specific test cases to verify RFC compliance.

Neustar has a long history of providing exceptional service that exceeds all performance specifications. The SRS and EPP interface have been designed to exceed the EPP specifications defined in Specification 10 of the Registry Agreement and profiled in Table 25-2. Evidence of Neustar’s ability to perform at these levels can be found in the .biz monthly progress reports found on the ICANN website.


EPP Toolkits
Toolkits, under open source licensing, are freely provided to registrars for interfacing with the SRS. Both Java and C++ toolkits will be provided, along with the accompanying documentation. The Registrar Tool Kit (RTK) is a software development kit (SDK) that supports the development of a registrar software system for registering domain names in the registry using EPP. The SDK consists of software and documentation as described below.
The software consists of working Java and C++ EPP common APIs and samples that implement the EPP core functions and EPP extensions used to communicate between the registry and registrar. The RTK illustrates how XML requests (registration events) can be assembled and forwarded to the registry for processing. The software provides the registrar with the basis for a reference implementation that conforms to the EPP registry-registrar protocol. The software component of the SDK also includes XML schema definition files for all Registry EPP objects and EPP object extensions. The RTK also includes a “dummy” server to aid in the testing of EPP clients.
The accompanying documentation describes the EPP software package hierarchy, the object data model, and the defined objects and methods (including calling parameter lists and expected response behavior). New versions of the RTK are made available from time to time to provide support for additional features as they become available and support for other platforms and languages.
25.4 Proprietary EPP Extensions

The .書籍 registry will not include proprietary EPP extensions. Neustar has implemented various EPP extensions for both internal and external use in other TLD registries. These extensions use the standard EPP extension framework described in RFC 5730. Table 25-3 provides a list of extensions developed for other TLDs. Should the .書籍 registry require an EPP extension at some point in the future, the extension will be implemented in compliance with all RFC specifications including RFC 3735.


The full EPP schema to be used in the .書籍 registry is attached in the document titled “EPP Schema.”

25.5 Resourcing Plans
The development and support of EPP is largely the responsibility of the Development⁄Engineering and Quality Assurance teams. As an experience registry operator with a fully developed EPP solution, on-going support is largely limited to periodic updates to the standard and the implementation of TLD specific extensions.
The necessary resources will be pulled from the pool of available resources described in detail in the response to Question 31. The following resources are available from those teams:
Development⁄Engineering – 19 employees
Quality Assurance - 7 employees.
These resources are more than adequate to support any EPP modification needs of the .書籍 registry.

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