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The LDAP URL Format (RFC2255) Disclosure Number: IPCOM000002814D
Original Publication Date: 1997-Dec-01
Included in the Prior Art Database: 2019-Feb-15
Document File: 10 page(s) / 13K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

T. Howes: AUTHOR [+1]

Related Documents

10.17487/RFC2255: DOI


This document describes a format for an LDAP Uniform Resource Locator. [STANDARDS-TRACK]

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 17% of the total text.

Network Working Group T. Howes Request for Comments: 2255 M. Smith Category: Standards Track Netscape Communications Corp. December 1997

The LDAP URL Format

1. Status of this Memo

This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (1997). All Rights Reserved.


This document describes a directory access protocol that provides both read and update access. Update access requires secure authentication, but this document does not mandate implementation of any satisfactory authentication mechanisms.

In accordance with RFC 2026, section 4.4.1, this specification is being approved by IESG as a Proposed Standard despite this limitation, for the following reasons:

a. to encourage implementation and interoperability testing of these protocols (with or without update access) before they are deployed, and

b. to encourage deployment and use of these protocols in read-only applications. (e.g. applications where LDAPv3 is used as a query language for directories which are updated by some secure mechanism other than LDAP), and

c. to avoid delaying the advancement and deployment of other Internet standards-track protocols which require the ability to query, but not update, LDAPv3 directory servers.

Howes & Smith Standards Track [Page 1]

RFC 2255 LDAP URL Format December 1997

Readers are hereby warned that until mandatory authentication mechanisms are standardized, clients and servers written according to this specification which make use of update functionality are UNLIKELY TO INTEROPERATE, or MAY INTEROPERATE ONLY IF AUTHENTICATION IS REDUCED TO AN UNACCEPTABLY WEAK LEVEL.

Implementors are hereby discouraged from deploying LDAPv3 clients or servers which implement the update functionality, until a Proposed Standard for mandatory authentication in LDAPv3 has been approved and published as an RFC.

2. Abstract

LDAP is the Lightweight Directory Access Protocol, defined in [1], [2] and [3]. This document describes a format for an LDAP Uniform Resource Locator. The format describes an LDAP search operation to perform to retrieve information from an LDAP directory. This document replaces RFC 1959. It updates the LDAP URL format for version 3 of LDAP and clarifies how LDAP URLs are resolved. This document also defines an extension mechanism for LDAP URLs, so that future documents can extend their functionality, for example, to provide access to new LDAPv3 extensions as they are defined.

The key words "MUST", "MAY", and "SHOULD" used in this document are to be interpreted as described in [6].

Howes & Smith Standards Track [Page 2]

RFC 2255 LDAP URL Format December 1997

3. URL Definition

An LDAP URL begins with the protocol prefi...