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Openldap

Installation

server side

configure FQDN hostname for your server

sudo nano /etc/hosts

192.168.56.111 ldap.example.com

sudo hostnamectl set-hostname ldap.example.com --static

Update Debian server

sudo apt  update -y
sudo apt  upgrade -y

Install OpenLDAP on Debian 11 / Debian 10 Linux

sudo apt  install slapd ldap-utils -y
sudo dpkg-reconfigure slapd

Answer these questions:

omit openldap server configuration? No DNS domain name? example.com remove the database when slapd is purged? No move old database? Yes

check ldap configuration:

sudo slapcat

Add base dn for Users and Groups

nano basedn.ldif
dn: ou=people,dc=example,dc=com 
objectClass: organizationalUnit
ou: people
dn: ou=groups,dc=example,dc=com
objectClass: organizationalUnit
ou: groups

apply basedn.ldif

sudo ldapadd -x -D cn=admin,dc=example,dc=com -W -f basedn.ldif

Add User Accounts and Groups

Generate a password for the user account to add

sudo slappasswd

sample output:

New password:
Re-enter new password:
{SSHA}5D94oKzVyJYzkCq21LhXDZFNZpPQD9uE

Create ldif file for adding users

nano ldapusers.ldif
dn: uid=jmutai,ou=people,dc=example,dc=com
objectClass: inetOrgPerson
objectClass: posixAccount
objectClass: shadowAccount
cn: Josphat
sn: Mutai
userPassword: {SSHA}5D94oKzVyJYzkCq21LhXDZFNZpPQD9uE
loginShell: /bin/bash
homeDirectory: /home/jmutai
uidNumber: 3000
gidNumber: 300

apply ldapusers.ldif

sudo ldapadd -x -D cn=admin,dc=example,dc=com -W -f ldapusers.ldif

Create ldif file for adding group

nano ldapgroups.ldif
dn: cn=jmutai,ou=groups,dc=example,dc=com
objectClass: posixGroup
cn: jmutai
gidNumber: 3000
memberUid: jmutai

sudo ldapadd -x -D cn=admin,dc=example,dc=com -W -f ldapgroups.ldif

Install LDAP Account Manager on Debian 11 / Debian 10

Download the latest release of ldap account manager deb package

wget http://prdownloads.sourceforge.net/lam/ldap-account-manager_7.7-1_all.deb
sudo apt install -f ./ldap-account-manager_7.7-1_all.deb

Configure LDAP Account Manager on Debian 11 / Debian 10

check it on the web:

http://(server’s hostname or IP address)/lam http://192.168.56.111//lam

client side Debian

sudo apt update
sudo apt install libnss-ldap libpam-ldap ldap-utils

Answer these questions:

LDAP server URI ?

ldap://192.168.56.111/

Distinguished name of search base?

dc=example,dc=com

LDAP version to use?

3

LDAP account for root?

cn=admin,dc=example,dc=com

LDAP root account password?

admin password (smile)

Allow LDAP admin account to behave like local root?

Yes

Does the LDAP database require login?

No

LDAP administrative account?

cn=admin,dc=example,dc=com

LDAP administrative password?

admin password (smile)

First edit nsswitch : (/etc/nsswitch.conf)

passwd:            compat ldap
group:             compat ldap
shadow:            compat ldap

Then edit these files :

/etc/pam.d/common-account

account sufficient pam_unix.so

account required pam_ldap.so

/etc/pam.d/common-auth

auth sufficient pam_unix.so nullok_secure
auth required pam_ldap.so use_first_pass
auth required pam_permit.so

/etc/pam.d/common-password

password sufficient pam_unix.so nullok obsecure md5
password required pam_ldap.so

/etc/pam.d/common-session

session required pam_unix.so
session required pam_mkhomedir.so skel=/etc/skel umask=0022

Then restart nscd service

/etc/init.d/nscd restart

Run this command and select all parameters:

pam-auth-update --force

client side Centos

sudo yum update
sudo yum install  nss-pam-ldapd nscd openldap-clients -y

After install the packages you should run the following command for change configs:

authconfig-tui

in the next page you should enter ldap uri and base dn

also add these lines in this file:

sudo vi /etc/nslcd.conf

ldap_version 3 binddn cn=admin,dc=example,dc=com bindpw [admin password]

Then restart nscd service

service nslcd restart

Then add the line in this file for make home directory for the ldap users :

/etc/pam.d/sshd

session required pam_mkhomedir.so skel=/etc/skel umask=0022

Then restart sshd service

sudo service sshd restart

Commands

ldapsearch -x -D cn=admin,dc=test,dc=com -w [pass] -p 389 -h localhost
ldapadd -x -D cn=admin,dc=test,dc=com -w  [pass] -p 389 -h localhost -f sshPublicKey.ldif
ldapmodify -x -a -D cn=admin,dc=test,dc=com -w [pass] -p 389 -h localhost -f /etc
/ldap/schema/ppolicy.ldif

LSC configuration

LSC Link