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Directory Service. AMHS Implementation Workshop Chennai, India 15 th – 17 th December 2008. List of Topics. Concept of Directory Service ATN Specific Object Classes Uses of Directory Asia/Pacific Interim AMHS Database. Definition of Directory. Definition from SARPs
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Directory Service AMHS Implementation Workshop Chennai, India 15th – 17th December 2008
List of Topics • Concept of Directory Service • ATN Specific Object Classes • Uses of Directory • Asia/Pacific Interim AMHS Database
Definition of Directory • Definition from SARPs “The Directory is a collection of systems which cooperate to hold a logical database of information about a set of objects in the real world.”
Concept of Directory Services • Information Model • Schema • Directory Information Tree (DIT) • Directory Information Base (DIB) • Object Classes • Attributes
ATN Directory Systems • ATN Directory System (ATN DIR) consists of 3 main elements • Directory Information Base (DIB) • Directory Service Agent (DSA) • Directory User Agent (DUA)
ATN Directory Information Base • The information held in the ATN DIR is collectively known as the Directory Information Base (DIB). • The structure of the DIB, called the Directory Information Tree (DIT), defines the hierarchy of record types contained in the directory.
ATN Directory Information Base • Each record type is defined by an object class. • The fields of each record are defined by attributes. • The Directory Schema defines which attributes are contained in each object class.
ATN Directory Service Agent • ATN Directory Service Agent (DSA) • DSA is an application process that provide access to the DIB to DUAs and/or other DSAs. • Answers directory information requests. • Maintains the data base locally and interact with other DSA in order to process requests.
ATN Directory User Agent • ATN Directory User Agent (DUA) • Interface to the directory information for applications. • Requests directory information from attached DSA. The DSA can subsequently forward the request to relevant DSA. • Updates information in the DSAs via attached DSA.
Concept of Directory Services • ICAO Doc 9705 – ATN SARPs Ed. 3 Sub-Volume 7 • Definition of Directory for the ATN environment • Directory Object Class Specification and Attributes for Directory Service Agent (DSA) and Directory User Agent (DUA) • Directory System Schema • Directory System Protocol
ATN Specific Object Classes • atn-Organization • atn-OrganizationalUnit • atn-OrganizationalPerson • atn-OrganizationalRole • atn-ApplicationEntity • atn-CertificationAuthority • atn-Aircraft
ATN Specific Object Classes • atn-AmhsUser • atn-AmhsDistributionList • atn-AmhsUserAgent • atn-AmhsGateway • atn-Facility • atn-AmhsMD • atn-IdrpRouter • atn-DirectorySystemAgent
Uses of Directory • ATN AMHS • Name to O/R address look-up and broadcast. • CM • Application capability look-up • Security • Certificate look-up and broadcast
AMHS Uses of Directory • Possible uses of AMHS Directory by AMHS MTAs: • retrieval of remote MTA information • NSAP • MTA name and password • service capabilities
AMHS Uses of Directory • Possible uses of ATN Directory for AMHS Users: • Name Resolution • Distribution-list (DL) Expansion; • Determination of User Capabilities; • Address Conversion; and • Use of certificates for user/message authentication
Asia/Pacific Interim AMHS DB • In the ATNTTF 7th in 2005, the issue of AMHS Address database was discussed. • In 2007, the Asia/Pacific Interim AMHS DB was operational. • Data format is based on the Asia/Pacific AMHS MTA/UA Naming Registration Table & Contact List • This DB is “Off-line” database.
Asia/Pacific Interim AMHS DB • AMHS MTA/UA Registration Table • Contracting State : Authority administering the MTA. • MTA ID : Numbering scheme where each MTA is assigned with an ordinal number. • User Agent ID : Sub-ordinate number assigned to the User Agent Name registered under a MTA. • Addressing scheme : Addressing scheme recommended by ATN SARPS. Values are limited to XF or CAAS. • Country-name : The “C” value of AMHS MD identifier. • Administration-domain-name : The “A” value of AMHS MD identifier. • Private-domain-name : The “P” value of AMHS MD identifier. • Organization name : The “O” value of attributes identifying an geographical unit or an organization within MD.
Asia/Pacific Interim AMHS DB • AMHS MTA/UA Registration Table • Organization-unit-name-1 : The “OU1” value of attributes identifies 4-letter location indicator within the organization “O”. • User Agent (Direct User only) : The “CN” value (Common Name) of attributes identifies a User Agent (UA) i.e. direct user within MD. • Description of user : Brief description of the UA, the direct user. NOC = network operating centre • MTA Name : The name of the MTA hosting the AMHS user. (Used in AMHS binds.) • NSAP address : NSAP address of the MTA. TSEL value : TSEL value of the MTA. • Capability : The type of services supported by the MTA.
Asia/Pacific Interim AMHS DB • AMHS MTA Administration Contact List • Contracting State : Authority administering the MTA. • MTA ID : Numbering scheme where each MTA is assigned with an ordinal number. • MTA Name The name of the MTA hosting the AMHS user. (Used in AMHS binds.) • Point of contact : Name of person responsible for the administration of the MTA. • Contact e-mail address : E-mail address of the Office or person responsible for the administration of the MTA. • Contact telephone number & Fax number: • Contact mailing address Official correspondence address of the Office or person responsible for the administration of the MTA.
Asia/Pacific Interim AMHS DB http://amhsdb.aerothai.co.th
