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thistleknot
Asked: 2021-10-17 07:14:20 +0800 CST

openldap why am I not able to id the user account?

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I followed this openldap guide

https://kifarunix.com/install-and-setup-openldap-on-rocky-linux-8/

Got it all working up until I try to id the user on the client (following this guide: https://kifarunix.com/configure-sssd-for-ldap-authentication-on-rocky-linux-8/)

I get a message about "no such user"

The openldap tutorial lists the objectClass for users.ldif

dn: uid=johndoe,ou=people,dc=ldapmaster,dc=kifarunix-demo,dc=com
objectClass: inetOrgPerson
objectClass: posixAccount
objectClass: shadowAccount

and I've noticed other sites use

objectClass: account

(see: https://www.thegeekstuff.com/2015/02/openldap-add-users-groups/ & https://forums.centos.org/viewtopic.php?t=54808)

I've tried it both ways (and even tried including both)

I can do an ldapsearch from the client to the server and query any of those objectClass's

I'm not sure what I'm missing.

I checked my nsswitch.conf and ensured sss was before files for passwd

openldap

1 Answers

  1. I did basic testing and disabled TLS.

    My issue was likely in the SSSD.conf and not having the right objectClass as well as matching DN, CN, and OU's

    Server

    #https://www.server-world.info/en/note?os=CentOS_7&p=openldap
yum -y install openldap-servers openldap-clients firewalld mlocate man --nobest
updatedb
cp /usr/share/openldap-servers/DB_CONFIG.example /var/lib/ldap/DB_CONFIG 
chown ldap. /var/lib/ldap/DB_CONFIG 
systemctl start slapd 
systemctl enable slapd
cat <<EOF > chrootpw.ldif 
# specify the password generated above for "olcRootPW" section
dn: olcDatabase={0}config,cn=config
changetype: modify
add: olcRootPW
olcRootPW: 1234
EOF
ldapadd -Y EXTERNAL -H ldapi:/// -f chrootpw.ldif 
ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/openldap/schema/cosine.ldif
ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/openldap/schema/nis.ldif
ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/openldap/schema/inetorgperson.ldif
cat <<EOF > chdomain.ldif
dn: olcDatabase={1}monitor,cn=config
changetype: modify
replace: olcAccess
olcAccess: {0}to * by dn.base="gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth"
  read by dn.base="cn=Manager,dc=srv,dc=world" read by * none

dn: olcDatabase={2}mdb,cn=config
changetype: modify
replace: olcSuffix
olcSuffix: dc=srv,dc=world

dn: olcDatabase={2}mdb,cn=config
changetype: modify
replace: olcRootDN
olcRootDN: cn=Manager,dc=srv,dc=world

dn: olcDatabase={2}mdb,cn=config
changetype: modify
add: olcRootPW
olcRootPW: 1234

dn: olcDatabase={2}mdb,cn=config
changetype: modify
add: olcAccess
olcAccess: {0}to attrs=userPassword,shadowLastChange by
  dn="cn=Manager,dc=srv,dc=world" write by anonymous auth by self write by * none
olcAccess: {1}to dn.base="" by * read
olcAccess: {2}to * by dn="cn=Manager,dc=srv,dc=world" write by * read
EOF
ldapmodify -Y EXTERNAL -H ldapi:/// -f chdomain.ldif
cat <<EOF > basedomain.ldif
# replace to your own domain name for "dc=***,dc=***" section

dn: dc=srv,dc=world
objectClass: top
objectClass: dcObject
objectclass: organization
o: Server World
dc: Srv

dn: cn=Manager,dc=srv,dc=world
objectClass: organizationalRole
cn: Manager
description: Directory Manager

dn: ou=Users,dc=srv,dc=world
objectClass: organizationalUnit
objectClass: top
ou: Users

dn: ou=Groups,dc=srv,dc=world
objectClass: organizationalUnit
objectClass: top
ou: Groups

EOF
ldapadd -x -w 1234 -D cn=Manager,dc=srv,dc=world -f basedomain.ldif
systemctl start firewalld
systemctl enable firewalld
firewall-cmd --add-service=ldap --permanent 
firewall-cmd --reload

cat <<EOF > adam.ldif
dn: uid=adam,ou=Users,dc=srv,dc=world
objectClass: top
objectClass: account
objectClass: posixAccount
objectClass: shadowAccount
cn: adam
uid: adam
uidNumber: 16859
gidNumber: 100
homeDirectory: /home/adam
loginShell: /bin/bash
gecos: adam
userPassword: 1234
shadowLastChange: 0
shadowMax: 0
shadowWarning: 0
EOF
ldapadd -x -w 1234 -D "cn=Manager,dc=srv,dc=world" -f adam.ldif
ldappasswd -s 1234 -w 1234 -D "cn=Manager,dc=srv,dc=world" -x "uid=adam,ou=Users,dc=srv,dc=world"

    SSSD.conf [client]

    cat <<EOF > /etc/sssd/sssd.conf
[sssd]
services = nss, pam, sudo
config_file_version = 2
domains = default

[sudo]

[nss]

[pam]
offline_credentials_expiration = 60

[domain/default]
ldap_id_use_start_tls = False
cache_credentials = True
ldap_search_base = dc=srv,dc=world
id_provider = ldap
auth_provider = ldap
chpass_provider = ldap
access_provider = ldap
sudo_provider = ldap
ldap_uri = ldap://ldapmaster
ldap_default_bind_dn = cn=Manager,dc=srv,dc=world
#ldap_default_authtok_type = password
ldap_default_authtok = 1234
#ldap_user_search_base = CN=Users,DC=srv,DC=world
#ldap_tls_reqcert = demand
#ldap_tls_cacert = /etc/pki/tls/cacert.crt
#ldap_tls_cacertdir = /etc/pki/tls
ldap_search_timeout = 50
ldap_network_timeout = 60
#ldap_sudo_search_base = ou=SUDOers,dc=ldapmaster,dc=ldapmaster,dc=com
ldap_access_order = filter
ldap_access_filter = (objectClass=posixAccount)
EOF
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