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Old 06-16-2013, 08:12 PM   #1
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Registered: Jul 2012
Posts: 12

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Assistance ldap kerberos auth against AD 2008 centos 5.8


I hope you are all well.
I am in need of assistance, I have been trying to get our Centos 5.8 servers to authenticate against Active Directory 2008 servers.

I have no control over the AD server, just a bunch of linux servers running Centos5.8.

Previously ldap was setup and authenticating to the AD server with no tls certificate. Recently the AD people have started moving people away from our current domain to a new domain. And for the life of me I cannot get the servers to authenticate against the new domain.

i am not using windbind or samba for authentication.

If someone can have a look and see where I am going wrong/what I am missing I would greatly appreciate it.

my ldapsearch returns positive results.

authconfig --enablekrb5 --enablekrb5kdcdns --disbleldapauth --disablewinbindauth --disablewinbind --enableldap --ldapserver ldap:// --ldapbasedn dc=ABC,dc=net --enablelocauthorize --disablesmbauth --updateall

Here are my files:
(santised version)


base dc=ABC,dc=net

binddn CN=USER1,OU=aa,OU=,pp,OU=blah,OU=moo,OU=blah,DC=ABC,DC=net
bindpw the_password

tls_cacertdir /etc/openldap/cacerts
tls_checkpeer no
ssl no
bind_policy soft
scope sub

timelimit 120
bind_timelimit 120
idle_timelimit 3600
pagesize 1000

nss_initgroups_ignoreusers root,ldap,named,avahi,haldaemon,dbus,radvd,tomcat,radiusd,news,mailman,nscd,gdm

referrals no
nss_schema rfc2307bis

nss_base_passwd dc=ABC,dc=net?sub?&(objectCategory=user)(uidnumber=*)
nss_base_shadow dc=ABC,dc=net?sub?&(objectCategory=user)(uidnumber=*)
nss_base_group dc=ABC,dc=net?sub?&(objectCategory=group)(gidnumber=*)

nss_map_objectclass posixAccount user
nss_map_objectclass shadowAccount user
nss_map_objectclass posixGroup group
nss_map_attribute homeDirectory unixHomeDirectory
nss_map_attribute shadowLastChange pwdLastSet
nss_map_attribute gecos displayName
nss_map_attribute uniqueMember member
pam_member_attribute member
pam_login_attribute sAMAccountName

pam_password ad
uri ldap://


default = FILE:/var/log/krb5libs.log
kdc = FILE:/var/log/krb5kdc.log
admin_server = FILE:/var/log/kadmind.log

default_realm =
dns_lookup_realm = false
dns_lookup_kdc = false
ticket_lifetime = 10h
forwardable = yes
renew_lifetime = 7d

kdc =
admin_server =
} = {
kdc =
admin_server =


pam = {
debug = false
ticket_lifetime = 10h
renew_lifetime = 7d
forwardable = true
krb4_convert = false


config_file_version = 2
services = nss, pam

domains = LDAP



# Example LDAP domain

id_provider = ldap
ldap_schema = rfc2307bis
ldap_uri = ldap://
ldap_search_base = dc=ABC,dc=net

ldap_default_bind_dn = CN=USER1,OU=aa,OU=,pp,OU=blah,OU=moo,OU=blah,DC=ABC,DC=net
ldap_default_authtok_type = password
ldap_default_authtok = the_passord

enumerate = false

cache_credentials = true

id_provider = ldap
auth_provider = krb5
chpass_provider = krb5

ldap_sasl_mech = GSSAPI

ldap_user_object_class = user
ldap_group_object_class = group
ldap_group_search_base = OU=GRP,OU=Data,DC=ABC,DC=net
ldap_user_home_directory = unixHomeDirectory
ldap_user_principal = userPrincipalName
ldap_account_expire_policy = ad
ldap_force_upper_case_realm = true
ldap_user_name = sAMAccountName

ldap_group_member = member
ldap_group_nesting_level = 4

#ldap_user_objectsid = objectSid
#ldap_group_objectsid = objectSID
#ldap_id_mapping = True

ldap_user_uid_number = uidNumber
ldap_user_gid_number = gidNumber
ldap_user_home_directory = unixHomeDirectory
ldap_user_shell = loginShell

ldap_force_upper_case_realm = true
;min_id = 0
krb5_server =
krb5_realm =


debug_level = 9

Last edited by shiden; 06-16-2013 at 08:13 PM.


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