OpenLDAP Software 2.4 Administrator's Guide

Table of Contents

Preface
1. Introduction to OpenLDAP Directory Services
1.1. What is a directory service?
1.2. What is LDAP?
1.3. When should I use LDAP?
1.4. When should I not use LDAP?
1.5. How does LDAP work?
1.6. What about X.500?
1.7. What is the difference between LDAPv2 and LDAPv3?
1.8. LDAP vs RDBMS
1.9. What is slapd and what can it do?

2. A Quick-Start Guide
3. The Big Picture - Configuration Choices
3.1. Local Directory Service
3.2. Local Directory Service with Referrals
3.3. Replicated Directory Service
3.4. Distributed Local Directory Service

4. Building and Installing OpenLDAP Software
4.1. Obtaining and Extracting the Software
4.2. Prerequisite software
4.2.1. Transport Layer Security
4.2.2. Simple Authentication and Security Layer
4.2.3. Kerberos Authentication Service
4.2.4. Database Software
4.2.5. Threads
4.2.6. TCP Wrappers

4.3. Running configure
4.4. Building the Software
4.5. Testing the Software
4.6. Installing the Software

5. Configuring slapd
5.1. Configuration Layout
5.2. Configuration Directives
5.2.1. cn=config
5.2.2. cn=module
5.2.3. cn=schema
5.2.4. Backend-specific Directives
5.2.5. Database-specific Directives
5.2.6. BDB and HDB Database Directives

5.3. Configuration Example
5.4. Converting old style slapd.conf(5) file to cn=config format

6. The slapd Configuration File
6.1. Configuration File Format
6.2. Configuration File Directives
6.2.1. Global Directives
6.2.2. General Backend Directives
6.2.3. General Database Directives
6.2.4. BDB and HDB Database Directives

6.3. Configuration File Example

7. Running slapd
7.1. Command-Line Options
7.2. Starting slapd
7.3. Stopping slapd

8. Access Control
8.1. Introduction
8.2. Access Control via Static Configuration
8.2.1. What to control access to
8.2.2. Who to grant access to
8.2.3. The access to grant
8.2.4. Access Control Evaluation
8.2.5. Access Control Examples

8.3. Access Control via Dynamic Configuration
8.3.1. What to control access to
8.3.2. Who to grant access to
8.3.3. The access to grant
8.3.4. Access Control Evaluation
8.3.5. Access Control Examples
8.3.6. Access Control Ordering

8.4. Access Control Common Examples
8.4.1. Basic ACLs
8.4.2. Matching Anonymous and Authenticated users
8.4.3. Controlling rootdn access
8.4.4. Managing access with Groups
8.4.5. Granting access to a subset of attributes
8.4.6. Allowing a user write to all entries below theirs
8.4.7. Allowing entry creation
8.4.8. Tips for using regular expressions in Access Control
8.4.9. Granting and Denying access based on security strength factors (ssf)
8.4.10. When things aren't working as expected

8.5. Sets - Granting rights based on relationships
8.5.1. Groups of Groups
8.5.2. Group ACLs without DN syntax
8.5.3. Following references

9. Limits
9.1. Introduction
9.2. Soft and Hard limits
9.3. Global Limits
9.4. Per-Database Limits
9.4.1. Specify who the limits apply to
9.4.2. Specify time limits
9.4.3. Specifying size limits
9.4.4. Size limits and Paged Results

9.5. Example Limit Configurations
9.5.1. Simple Global Limits
9.5.2. Global Hard and Soft Limits
9.5.3. Giving specific users larger limits
9.5.4. Limiting who can do paged searches

9.6. Further Information

10. Database Creation and Maintenance Tools
10.1. Creating a database over LDAP
10.2. Creating a database off-line
10.2.1. The slapadd program
10.2.2. The slapindex program
10.2.3. The slapcat program

10.3. The LDIF text entry format

11. Backends
11.1. Berkeley DB Backends
11.1.1. Overview
11.1.2. back-bdb/back-hdb Configuration
11.1.3. Further Information

11.2. LDAP
11.2.1. Overview
11.2.2. back-ldap Configuration
11.2.3. Further Information

11.3. LDIF
11.3.1. Overview
11.3.2. back-ldif Configuration
11.3.3. Further Information

11.4. MDB
11.4.1. Overview
11.4.2. back-mdb Configuration
11.4.3. Further Information

11.5. Metadirectory
11.5.1. Overview
11.5.2. back-meta Configuration
11.5.3. Further Information

11.6. Monitor
11.6.1. Overview
11.6.2. back-monitor Configuration
11.6.3. Further Information

11.7. Null
11.7.1. Overview
11.7.2. back-null Configuration
11.7.3. Further Information

11.8. Passwd
11.8.1. Overview
11.8.2. back-passwd Configuration
11.8.3. Further Information

11.9. Perl/Shell
11.9.1. Overview
11.9.2. back-perl/back-shell Configuration
11.9.3. Further Information

11.10. Relay
11.10.1. Overview
11.10.2. back-relay Configuration
11.10.3. Further Information

11.11. SQL
11.11.1. Overview
11.11.2. back-sql Configuration
11.11.3. Further Information

12. Overlays
12.1. Access Logging
12.1.1. Overview
12.1.2. Access Logging Configuration
12.1.3. Further Information

12.2. Audit Logging
12.2.1. Overview
12.2.2. Audit Logging Configuration
12.2.3. Further Information

12.3. Chaining
12.3.1. Overview
12.3.2. Chaining Configuration
12.3.3. Handling Chaining Errors
12.3.4. Read-Back of Chained Modifications
12.3.5. Further Information

12.4. Constraints
12.4.1. Overview
12.4.2. Constraint Configuration
12.4.3. Further Information

12.5. Dynamic Directory Services
12.5.1. Overview
12.5.2. Dynamic Directory Service Configuration
12.5.3. Further Information

12.6. Dynamic Groups
12.6.1. Overview
12.6.2. Dynamic Group Configuration

12.7. Dynamic Lists
12.7.1. Overview
12.7.2. Dynamic List Configuration
12.7.3. Further Information

12.8. Reverse Group Membership Maintenance
12.8.1. Overview
12.8.2. Member Of Configuration
12.8.3. Further Information

12.9. The Proxy Cache Engine
12.9.1. Overview
12.9.2. Proxy Cache Configuration
12.9.3. Further Information

12.10. Password Policies
12.10.1. Overview
12.10.2. Password Policy Configuration
12.10.3. Further Information

12.11. Referential Integrity
12.11.1. Overview
12.11.2. Referential Integrity Configuration
12.11.3. Further Information

12.12. Return Code
12.12.1. Overview
12.12.2. Return Code Configuration
12.12.3. Further Information

12.13. Rewrite/Remap
12.13.1. Overview
12.13.2. Rewrite/Remap Configuration
12.13.3. Further Information

12.14. Sync Provider
12.14.1. Overview
12.14.2. Sync Provider Configuration
12.14.3. Further Information

12.15. Translucent Proxy
12.15.1. Overview
12.15.2. Translucent Proxy Configuration
12.15.3. Further Information

12.16. Attribute Uniqueness
12.16.1. Overview
12.16.2. Attribute Uniqueness Configuration
12.16.3. Further Information

12.17. Value Sorting
12.17.1. Overview
12.17.2. Value Sorting Configuration
12.17.3. Further Information

12.18. Overlay Stacking
12.18.1. Overview
12.18.2. Example Scenarios

13. Schema Specification
13.1. Distributed Schema Files
13.2. Extending Schema
13.2.1. Object Identifiers
13.2.2. Naming Elements
13.2.3. Local schema file
13.2.4. Attribute Type Specification
13.2.5. Object Class Specification
13.2.6. OID Macros

14. Security Considerations
14.1. Network Security
14.1.1. Selective Listening
14.1.2. IP Firewall
14.1.3. TCP Wrappers

14.2. Data Integrity and Confidentiality Protection
14.2.1. Security Strength Factors

14.3. Authentication Methods
14.3.1. "simple" method
14.3.2. SASL method

14.4. Password Storage
14.4.1. SSHA password storage scheme
14.4.2. CRYPT password storage scheme
14.4.3. MD5 password storage scheme
14.4.4. SMD5 password storage scheme
14.4.5. SHA password storage scheme
14.4.6. SASL password storage scheme

14.5. Pass-Through authentication
14.5.1. Configuring slapd to use an authentication provider
14.5.2. Configuring saslauthd
14.5.3. Testing pass-through authentication

15. Using SASL
15.1. SASL Security Considerations
15.2. SASL Authentication
15.2.1. GSSAPI
15.2.2. KERBEROS_V4
15.2.3. DIGEST-MD5
15.2.4. EXTERNAL
15.2.5. Mapping Authentication Identities
15.2.6. Direct Mapping
15.2.7. Search-based mappings

15.3. SASL Proxy Authorization
15.3.1. Uses of Proxy Authorization
15.3.2. SASL Authorization Identities
15.3.3. Proxy Authorization Rules

16. Using TLS
16.1. TLS Certificates
16.1.1. Server Certificates
16.1.2. Client Certificates

16.2. TLS Configuration
16.2.1. Server Configuration
16.2.2. Client Configuration

17. Constructing a Distributed Directory Service
17.1. Subordinate Knowledge Information
17.2. Superior Knowledge Information
17.3. The ManageDsaIT Control

18. Replication
18.1. Replication Technology
18.1.1. LDAP Sync Replication

18.2. Deployment Alternatives
18.2.1. Delta-syncrepl replication
18.2.2. N-Way Multi-Master replication
18.2.3. MirrorMode replication
18.2.4. Syncrepl Proxy Mode

18.3. Configuring the different replication types
18.3.1. Syncrepl
18.3.2. Delta-syncrepl
18.3.3. N-Way Multi-Master
18.3.4. MirrorMode
18.3.5. Syncrepl Proxy

19. Maintenance
19.1. Directory Backups
19.2. Berkeley DB Logs
19.3. Checkpointing
19.4. Migration

20. Monitoring
20.1. Monitor configuration via cn=config(5)
20.2. Monitor configuration via slapd.conf(5)
20.3. Accessing Monitoring Information
20.4. Monitor Information
20.4.1. Backends
20.4.2. Connections
20.4.3. Databases
20.4.4. Listener
20.4.5. Log
20.4.6. Operations
20.4.7. Overlays
20.4.8. SASL
20.4.9. Statistics
20.4.10. Threads
20.4.11. Time
20.4.12. TLS
20.4.13. Waiters

21. Tuning
21.1. Performance Factors
21.1.1. Memory
21.1.2. Disks
21.1.3. Network Topology
21.1.4. Directory Layout Design
21.1.5. Expected Usage

21.2. Indexes
21.2.1. Understanding how a search works
21.2.2. What to index
21.2.3. Presence indexing

21.3. Logging
21.3.1. What log level to use
21.3.2. What to watch out for
21.3.3. Improving throughput

21.4. Caching
21.4.1. Berkeley DB Cache
21.4.2. slapd(8) Entry Cache (cachesize)
21.4.3. IDL Cache (idlcachesize)

21.5. slapd(8) Threads

22. Troubleshooting
22.1. User or Software errors?
22.2. Checklist
22.3. OpenLDAP Bugs
22.4. 3rd party software error
22.5. How to contact the OpenLDAP Project
22.6. How to present your problem
22.7. Debugging slapd(8)
22.8. Commercial Support

A. Changes Since Previous Release
A.1. New Guide Sections
A.2. New Features and Enhancements in 2.4
A.2.1. Better cn=config functionality
A.2.2. Better cn=schema functionality
A.2.3. More sophisticated Syncrepl configurations
A.2.4. N-Way Multimaster Replication
A.2.5. Replicating slapd Configuration (syncrepl and cn=config)
A.2.6. Push-Mode Replication
A.2.7. More extensive TLS configuration control
A.2.8. Performance enhancements
A.2.9. New overlays
A.2.10. New features in existing Overlays
A.2.11. New features in slapd
A.2.12. New features in libldap
A.2.13. New clients, tools and tool enhancements
A.2.14. New build options

A.3. Obsolete Features Removed From 2.4
A.3.1. Slurpd
A.3.2. back-ldbm

B. Upgrading from 2.3.x
B.1. cn=config olc* attributes
B.2. ACLs: searches require privileges on the search base

C. Common errors encountered when using OpenLDAP Software
C.1. Common causes of LDAP errors
C.1.1. ldap_*: Can't contact LDAP server
C.1.2. ldap_*: No such object
C.1.3. ldap_*: Can't chase referral
C.1.4. ldap_*: server is unwilling to perform
C.1.5. ldap_*: Insufficient access
C.1.6. ldap_*: Invalid DN syntax
C.1.7. ldap_*: Referral hop limit exceeded
C.1.8. ldap_*: operations error
C.1.9. ldap_*: other error
C.1.10. ldap_add/modify: Invalid syntax
C.1.11. ldap_add/modify: Object class violation
C.1.12. ldap_add: No such object
C.1.13. ldap add: invalid structural object class chain
C.1.14. ldap_add: no structuralObjectClass operational attribute
C.1.15. ldap_add/modify/rename: Naming violation
C.1.16. ldap_add/delete/modify/rename: no global superior knowledge
C.1.17. ldap_bind: Insufficient access
C.1.18. ldap_bind: Invalid credentials
C.1.19. ldap_bind: Protocol error
C.1.20. ldap_modify: cannot modify object class
C.1.21. ldap_sasl_interactive_bind_s: ...
C.1.22. ldap_sasl_interactive_bind_s: No such Object
C.1.23. ldap_sasl_interactive_bind_s: No such attribute
C.1.24. ldap_sasl_interactive_bind_s: Unknown authentication method
C.1.25. ldap_sasl_interactive_bind_s: Local error (82)
C.1.26. ldap_search: Partial results and referral received
C.1.27. ldap_start_tls: Operations error

C.2. Other Errors
C.2.1. ber_get_next on fd X failed errno=34 (Numerical result out of range)
C.2.2. ber_get_next on fd X failed errno=11 (Resource temporarily unavailable)
C.2.3. daemon: socket() failed errno=97 (Address family not supported)
C.2.4. GSSAPI: gss_acquire_cred: Miscellaneous failure; Permission denied;
C.2.5. access from unknown denied
C.2.6. ldap_read: want=# error=Resource temporarily unavailable
C.2.7. `make test' fails
C.2.8. ldap_*: Internal (implementation specific) error (80) - additional info: entry index delete failed
C.2.9. ldap_sasl_interactive_bind_s: Can't contact LDAP server (-1)

D. Recommended OpenLDAP Software Dependency Versions
D.1. Dependency Versions

E. Real World OpenLDAP Deployments and Examples
F. OpenLDAP Software Contributions
F.1. Client APIs
F.1.1. ldapc++
F.1.2. ldaptcl

F.2. Overlays
F.2.1. acl
F.2.2. addpartial
F.2.3. allop
F.2.4. autogroup
F.2.5. comp_match
F.2.6. denyop
F.2.7. dsaschema
F.2.8. lastmod
F.2.9. nops
F.2.10. nssov
F.2.11. passwd
F.2.12. proxyOld
F.2.13. smbk5pwd
F.2.14. trace
F.2.15. usn

F.3. Tools
F.3.1. Statistic Logging

F.4. SLAPI Plugins
F.4.1. addrdnvalues

G. Configuration File Examples
G.1. slapd.conf
G.2. ldap.conf
G.3. a-n-other.conf

H. LDAP Result Codes
H.1. Non-Error Result Codes
H.2. Result Codes
H.3. success (0)
H.4. operationsError (1)
H.5. protocolError (2)
H.6. timeLimitExceeded (3)
H.7. sizeLimitExceeded (4)
H.8. compareFalse (5)
H.9. compareTrue (6)
H.10. authMethodNotSupported (7)
H.11. strongerAuthRequired (8)
H.12. referral (10)
H.13. adminLimitExceeded (11)
H.14. unavailableCriticalExtension (12)
H.15. confidentialityRequired (13)
H.16. saslBindInProgress (14)
H.17. noSuchAttribute (16)
H.18. undefinedAttributeType (17)
H.19. inappropriateMatching (18)
H.20. constraintViolation (19)
H.21. attributeOrValueExists (20)
H.22. invalidAttributeSyntax (21)
H.23. noSuchObject (32)
H.24. aliasProblem (33)
H.25. invalidDNSyntax (34)
H.26. aliasDereferencingProblem (36)
H.27. inappropriateAuthentication (48)
H.28. invalidCredentials (49)
H.29. insufficientAccessRights (50)
H.30. busy (51)
H.31. unavailable (52)
H.32. unwillingToPerform (53)
H.33. loopDetect (54)
H.34. namingViolation (64)
H.35. objectClassViolation (65)
H.36. notAllowedOnNonLeaf (66)
H.37. notAllowedOnRDN (67)
H.38. entryAlreadyExists (68)
H.39. objectClassModsProhibited (69)
H.40. affectsMultipleDSAs (71)
H.41. other (80)

I. Glossary
I.1. Terms
I.2. Related Organizations
I.3. Related Products
I.4. References

J. Generic configure Instructions
K. OpenLDAP Software Copyright Notices
K.1. OpenLDAP Copyright Notice
K.2. Additional Copyright Notices
K.3. University of Michigan Copyright Notice

L. OpenLDAP Public License