Preface

In the past decade , LDAP directories have risen from a relatively obscure offshoot of an equally obscure field to become one of the linchpins of modern computing. Increasingly, LDAP directories are becoming the nerve center of an organization's computing infrastructure, providing naming, location, management, security, and other services that have traditionally been provided by network operating systems. Design and deployment of a successful LDAP directory service can be complex and challenging, yet little information is available explaining the ins and outs of this important task.

When two of us (Mark and Tim) finished writing a previous book, LDAP: Programming Directory-Enabled Applications with Lightweight Directory Access Protocol , in early 1997, we soon realized there was another, much bigger piece of the directory puzzle still to be addressed. The previous book was aimed at directory application programmers, but nothing similar was available to address the needs of directory decision makers , designers, and administrators. This book is aimed at that audience.

Recognizing the size of the task ahead of us and remembering the joys of giving up evenings and weekends for months at a time to meet deadlines for our first book, we quickly decided to expand our team. Just as quickly, we decided there was no one we'd rather share the fun with than our longtime friend and colleague, Gordon Good, at the time a senior directory developer at Netscape. Aside from being the third leg of the LDAP development team at the University of Michigan (U-M), Gordon brought a wealth of system administration experience from his past life as a directory and e-mail administrator and Web master for U-M. With Gordon on board, the three of us set about writing a book that we only half-jokingly referred to as the "LDAP Bible." The first edition of Understanding and Deploying LDAP Directory Services was published in 1999.

Two years later, we realized that it was time to update this book and publish a second edition. LDAPv3 work in the IETF was mostly complete. Numerous extensions to the basic LDAP protocol were being developed. LDAP support in commercial and open -source software was widespread. In this edition, we cover these recent directory services developments. In addition, in response to reader suggestions we have streamlined the text, added more hands-on examples, updated the examples to reflect currently available software versions, and updated the case studies to reflect current directory practice. We thank all the readers of the first edition who provided helpful suggestions, and we hope that you find this second edition even more valuable .