This overlay can record accesses to a given backend database on another
database.
+This allows all of the activity on a given database to be reviewed using arbitrary
+LDAP queries, instead of just logging to local flat text files. Configuration
+options are available for selecting a subset of operation types to log, and to
+automatically prune older log records from the logging database. Log records
+are stored with audit schema to assure their readability whether viewed as LDIF
+or in raw form.
+
+It is also used for {{SECT:delta-syncrepl replication}}
H3: Access Logging Configuration
+The following is a basic example that implements Access Logging:
+
+> database bdb
+> suffix dc=example,dc=com
+> ...
+> overlay accesslog
+> logdb cn=log
+> logops writes reads
+> logold (objectclass=person)
+>
+> database bdb
+> suffix cn=log
+> ...
+> index reqStart eq
+> access to *
+> by dn.base="cn=admin,dc=example,dc=com" read
+
+The following is an example used for {{SECT:delta-syncrepl replication}}:
+
+> database hdb
+> suffix cn=accesslog
+> directory /usr/local/var/openldap-accesslog
+> rootdn cn=accesslog
+> index default eq
+> index entryCSN,objectClass,reqEnd,reqResult,reqStart
+
+Accesslog overlay definitions for the primary db
+
+> database bdb
+> suffix dc=example,dc=com
+> ...
+> overlay accesslog
+> logdb cn=accesslog
+> logops writes
+> logsuccess TRUE
+> # scan the accesslog DB every day, and purge entries older than 7 days
+> logpurge 07+00:00 01+00:00
+
+An example search result against {{B:cn=accesslog}} might look like:
+
+> [ghenry@suretec ghenry]# ldapsearch -x -b cn=accesslog
+> # extended LDIF
+> #
+> # LDAPv3
+> # base <cn=accesslog> with scope subtree
+> # filter: (objectclass=*)
+> # requesting: ALL
+> #
+>
+> # accesslog
+> dn: cn=accesslog
+> objectClass: auditContainer
+> cn: accesslog
+>
+> # 20080110163829.000004Z, accesslog
+> dn: reqStart=20080110163829.000004Z,cn=accesslog
+> objectClass: auditModify
+> reqStart: 20080110163829.000004Z
+> reqEnd: 20080110163829.000005Z
+> reqType: modify
+> reqSession: 196696
+> reqAuthzID: cn=admin,dc=suretecsystems,dc=com
+> reqDN: uid=suretec-46022f8$,ou=Users,dc=suretecsystems,dc=com
+> reqResult: 0
+> reqMod: sambaPwdCanChange:- ###CENSORED###
+> reqMod: sambaPwdCanChange:+ ###CENSORED###
+> reqMod: sambaNTPassword:- ###CENSORED###
+> reqMod: sambaNTPassword:+ ###CENSORED###
+> reqMod: sambaPwdLastSet:- ###CENSORED###
+> reqMod: sambaPwdLastSet:+ ###CENSORED###
+> reqMod: entryCSN:= 20080110163829.095157Z#000000#000#000000
+> reqMod: modifiersName:= cn=admin,dc=suretecsystems,dc=com
+> reqMod: modifyTimestamp:= 20080110163829Z
+>
+> # search result
+> search: 2
+> result: 0 Success
+>
+> # numResponses: 3
+> # numEntries: 2
+
+For more information, please see {{slapo-accesslog(5)}} and the {{SECT:delta-syncrepl replication}} section.
+
H2: Audit Logging