= Overview of Enterprise Directory Architecture =
    Original author:  Beth Mercer - 20081031

The University of Alaska Enterprise Directory and Authentication Service are comprised 
of the following four architectural components:

* EDIR Directories
* EDIR "registry"
* Web Gateways
* Equalizer 

== EDIR Directory : SUN LDAP iPlanet Directories ==
The account, ''iplanet'', is found on both the Linux IDMP Cluster and "E" boxes SUN UNIX servers.

=== IDMP Cluster Functions and Instances ===
		* Source of information for web gateways
		* Source of identity for authentication service
		* Enforces uniqueness via LDIF updates
		  * BannerID 
                  * UASystemID 
                  * UASystemLegacyID 
                  * UID 
                  * mailAlternateAddress
                * Stores daily transaction log files for daily LDAP processing
                * Stores daily access logs for EDIR authenticated services
                * One active Instance; Prod on IDMP-3
                * Two inactive instances; Prep (IDMP-0), Test (IDMP-1)
=== "E" Box Functions and Instances ===
		* Enforces uniqueness via Web Edits
		* Enforces limited password logic via Web Edits
		   * age
                   * length 
                   * composition 
                   * reuse
                * 3 instances; Test, Prep, Prod on 4 servers; eklutna, egegik, edgar, elias


== EDIR "registry" : Oracle Databases ==

		sxldap UNIX account and OPS$SXLDAP schema 

		superset of directory data
		reconciliation of entities from various systems of origin 
		   (primarily Banner)
		enforces business logic 

		3 instances; RPTT, RPTQ, RPTS
		on 1 server; summit


== Web Gateways ==

		ldapgw UNIX account for EDIR/AUTHSERV
	
		AUTHSERV: web authentication service and interface to security related functions;
		also interface to kerberos password/account management for kerberized directory records
		(e.g. password changes/resets, locking/unlocking accounts, creating guest accounts, etc.)

		EDIR:     white pages and interface to self service updates 

		iplanet UNIX account for UPDATE

		UPDATE:   interface called by both EDIR and AUTHSERV to perform directory updates

		3 instances each; Test, Prep, PROD
		on 4 servers; eklutna, egegik, edgar, elias
		(soon to be 5th server; elfin)


== Equalizer ==
The Equalizers balance the load for the following DNS names.

=== EDIR URLs ===
These URLs are accessed for directory information and user self-service actions.

			* edirtest.alaska.edu
			* edirprep.alaska.edu
			* edir.alaska.edu

=== AUTHSERV URLs ===
These URLs are accessed by IAM and the Help Desk to Manage EDIR LDAP entries for users when necessary.
			* authservtest.alaska.edu
			* authservprep.alaska.edu
			* authserv.alaska.edu


==== HTTP Ports ====
The equalizer balances access to ports for:
		* http 
                * https
		* ldap
                * ldaps

'''Note: ''''  The URL, email-lookup.alaska.edu, is no longer used.  Email information is found in the regular EDIR listing.

== Historical Use of Kerberos ==
'''NOTE:'''  Originally Kerberos synchronized LDAP password information with OIT.  That implementation is no longer current and not maintained in anyway.  At that time the Kerberos Realm consisted of:

		 * Synchronization Command: oitsynch UNIX account
		* A password store behind iPlanet Directory
		* A directory plugin implements kerberos authentication during directory bind
		* An UPDATE interface behind AUTHSERV implements kerberos password reset/change/lock/unlock functionality
		* 3 realms: test.alaska.edu, prep.alaska.edu, prod.alaska.edu - 1 each on 3 servers: cisca, cobalt, cupola

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LEGACY CHANGE HISTORY - NOTE: All subsequent changes are recorded in TracWiki[[br]]
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20081031 elm	corrected typos