Problem to configure dovecot-ldap.conf.ext

Mon Oct 24 23:27:46 UTC 2016

Hello,

Dovecot 2.2.25
CentOS 7

I setup ldap (FreeIPA) to have a user for dovecot that can (read search 
compare) all attributes that I need for dovecot.

I must also have  mailAlternateAddress 

When I make a ldapsearch with this user, I found all I need to configure 
dovecot.

But for me it is not possible to configure this correct ?

I can make for user

doveadm auth test office 
and
doveadm auth test office at examle.com

with success authentication

but when I make a
doveadm auth test info at example.co (mailAlternateAddress)

I have a broken authentication

Can any give me a hint what is wrong, or is this not possible ?

# Space separated list of LDAP hosts to use. host:port is allowed too.
#hosts = 192.168.100.204 192.168.100.214
#hosts = 192.168.100.204
hosts = ipa.example.com

# LDAP URIs to use. You can use this instead of hosts list. Note that this
# setting isn't supported by all LDAP libraries.
#uris = ldap://ipa.example.com ldap://ipa1.example.com

# Distinguished Name - the username used to login to the LDAP server.
# Leave it commented out to bind anonymously (useful with auth_bind=yes).
dn = uid=system,cn=sysaccounts,cn=etc,dc=example,dc=com

# Password for LDAP server, if dn is specified.
dnpass = 'XXXXXXXXXXXXXX'

# Use SASL binding instead of the simple binding. Note that this changes
# ldap_version automatically to be 3 if it's lower. Also note that SASL binds
# and auth_bind=yes don't work together.
sasl_bind = yes
# SASL mechanism name to use.
sasl_mech = gssapi
# SASL realm to use.
sasl_realm = EXAMPLE.COM
# SASL authorization ID, ie. the dnpass is for this "master user", but the
# dn is still the logged in user. Normally you want to keep this empty.
sasl_authz_id = imap/mx01.example.com at EXAMPLE.COM

# Use TLS to connect to the LDAP server.
#tls = yes
# TLS options, currently supported only with OpenLDAP:
tls_ca_cert_file = /etc/ipa/ca.crt
#tls_ca_cert_dir =
#tls_cipher_suite =
# TLS cert/key is used only if LDAP server requires a client certificate.
#tls_cert_file =
#tls_key_file =
# Valid values: never, hard, demand, allow, try
tls_require_cert = demand

# Use the given ldaprc path.
#ldaprc_path =

# LDAP library debug level as specified by LDAP_DEBUG_* in ldap_log.h.
# -1 = everything. You may need to recompile OpenLDAP with debugging enabled
# to get enough output.
#debug_level = 0

# Use authentication binding for verifying password's validity. This works by
# logging into LDAP server using the username and password given by client.
# The pass_filter is used to find the DN for the user. Note that the pass_attrs
# is still used, only the password field is ignored in it. Before doing any
# search, the binding is switched back to the default DN.
auth_bind = yes

# If authentication binding is used, you can save one LDAP request per login
# if users' DN can be specified with a common template. The template can use
# the standard %variables (see user_filter). Note that you can't
# use any pass_attrs if you use this setting.
#
# If you use this setting, it's a good idea to use a different
# dovecot-ldap.conf.ext for userdb (it can even be a symlink, just as long as
# the filename is different in userdb's args). That way one connection is used
# only for LDAP binds and another connection is used for user lookups.
# Otherwise the binding is changed to the default DN before each user lookup.
#
# For example:
#   auth_bind_userdn = cn=%u,ou=people,o=org
#
auth_bind_userdn = uid=%n,cn=users,cn=accounts,dc=example,dc=com

# LDAP protocol version to use. Likely 2 or 3.
ldap_version = 3

# LDAP base. %variables can be used here.
# For example: dc=mail, dc=example, dc=org
base = cn=users,cn=accounts,dc=example,dc=com

# Dereference: never, searching, finding, always
#deref = never

# Search scope: base, onelevel, subtree
scope = subtree
#scope = onelevel

# User attributes are given in LDAP-name=dovecot-internal-name list. The
# internal names are:
#   uid - System UID
#   gid - System GID
#   home - Home directory
#   mail - Mail location
#
# There are also other special fields which can be returned, see
# http://wiki2.dovecot.org/UserDatabase/ExtraFields
#user_attrs = homeDirectory=home,uidNumber=uid,gidNumber=gid
user_attrs = uid=user,uid=home=/srv/vmail/%$,=uid=10000,=gid=10000

# Filter for user lookup. Some variables can be used (see
# http://wiki2.dovecot.org/Variables for full list):
#   %u - username
#   %n - user part in user at domain, same as %u if there's no domain
#   %d - domain part in user at domain, empty if user there's no domain
user_filter = (&(objectClass=mailrecipient)(|(uid=%Ln)(mail=%Lu)
(mailAlternateAddress=%Lu)))

# Password checking attributes:
#  user: Virtual user name (user at domain), if you wish to change the
#        user-given username to something else
#  password: Password, may optionally start with {type}, eg. {crypt}
# There are also other special fields which can be returned, see
# http://wiki2.dovecot.org/PasswordDatabase/ExtraFields
pass_attrs = uid=user,userPassword=password,mailAlternateAddress=user

# If you wish to avoid two LDAP lookups (passdb + userdb), you can use
# userdb prefetch instead of userdb ldap in dovecot.conf. In that case you'll
# also have to include user_attrs in pass_attrs field prefixed with "userdb_"
# string. For example:
#pass_attrs = uid=user,userPassword=password,\
#  homeDirectory=userdb_home,uidNumber=userdb_uid,gidNumber=userdb_gid

# Filter for password lookups
#pass_filter = (&(objectClass=posixAccount)(uid=%u))
pass_filter = (&(objectClass=mailrecipient)(|(uid=%Ln)(mail=%Lu)
(mailAlternateAddress=%Lu)))

# Attributes and filter to get a list of all users
iterate_attrs = uid=user, mailAlternateAddress=user
iterate_filter = (objectClass=posixAccount)

# Default password scheme. "{scheme}" before password overrides this.
# List of supported schemes is in: http://wiki2.dovecot.org/Authentication
#default_pass_scheme = CRYPT

-- 
mit freundlichen Grüßen / best regards,

  Günther J. Niederwimmer