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Directory Service

Directory Service. X.500. X.500 – Idea. Idea : look up people and data User-friendly way By name, department, or organization Global White Pages directory 1984 CCITT and ISO started development. X.500 – What is it?. 1990 First official ISO implementation Electronic directory

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Directory Service

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  1. Directory Service X.500

  2. X.500 – Idea • Idea : look up people and data • User-friendly way • By name, department, or organization • Global White Pages directory • 1984 CCITT and ISO started development

  3. X.500 – What is it? • 1990 First official ISO implementation • Electronic directory • People and their data in an organization • Can be part of a global directory • Available via • Internet or • Private Net (LAN/VPN)

  4. X.500 – Directory Service • Many electronic directories • Organized in a single global directory • organized in a "tree" • common "root" directory

  5. X.500 – Principle I • Entries at each level of tree must have certain attributes • Some optional attributes established locally • Own implementations possible • must adhere to the basic schema • one or more central places manage directories. • DCE (Distributed Computing Environment)

  6. X.500 – Principle II • DSA Directory System Agent reflects • local directory • one organization or • group of organizations. • DSAs interconnected by Directory Information Tree (DIT). • X.500 as part of Distributed Computing Environment (DCE) • DCE in Global Directory Service (GDS).

  7. X.500 – Principle III • UI for access to DSAs = Directory User Agent (DUA). • DUAs include: • cmdline progs like whois, finger • programs that offer a graphical user interface.

  8. X.500 – Directory Service

  9. X.500 – Directory Service

  10. X.500 – Examples • InterNIC • organization that supervises domain name registration in the U.S. • Esnet • maintains X.500 data for all the U.S. national laboratories. • Many US Universities use X.500 • route e-mail • provide name lookup (LDAP)

  11. X.500 – Examples • Lotus Domino relies on X.500 (since v.5) • Internet Provider dial-up nodes / DNS • Microsoft Exchange Server • Oracle Internet Directory • Peerlogic Livecontent Directory • Siemens DirX Server • Umich slapd/slurpd • Computer Associated ETrust Directory • and others

  12. X.500 – Any Questions??? • Thanks for your Attention • References: • RFC1632 • www.isi.salford.ac.uk\staff\dwc\Version.Web\Contents.htm

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