SLAPO-CHAIN(5)

NAME
slapo-chain - chain overlay

SYNOPSIS
ETCDIR/slapd.conf

DESCRIPTION
The chain overlay to slapd(8) allows automatic referral chasing. Any time a referral is returned (except for bind operations), it is chased by using an instance of the ldap backend. If operations are performed with an identity (i.e. after a bind), the referrals are chased with the acl-authcDN (if any; see slapd-ldap(5) for details), with the original identity asserted by means of the proxyAuthz control (see draft-weltman-ldapv3-proxy for details).

The config directives that are specific to the chain overlay can be prefixed by chain-, to avoid conflicts with directives specific to the underlying database or to other stacked overlays.

There are no chain overlay specific directives; however, directives related to the instance of the ldap backend that is implicitly instantiated by the overlay may assume a special meaning when used in conjuction with this overlay.

overlay chain
    This directive adds the chain overlay to the current backend. The chain overlay may be used with any backend but is intended for use with local storage backends that may return referrals. It is useless in conjunction with the ldap and meta backends because they exploit the libldap specific referral chase feature.

chain-uri <ldapuri>
    This directive instructs the underlying ldap database about which URI to contact to follow referrals. If not given, the referral itself is parsed, and the protocol/host/port portions are used to establish a connection.

Directives for configuring the underlying ldap database must also be given, as shown here:

    chain-acl-authcDN	cn=Auth,dc=example,dc=com
    chain-acl-passwd	secret

Any valid directives for the ldap database may be used; see slapd-ldap(5) for details.

FILES

ETCDIR/slapd.conf
    default slapd configuration file

SEE ALSO
slapd.conf(5), slapd-ldap(5), slapd(8).

AUTHOR
Originally implemented by Howard Chu.