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How do I configure Ezeelogin to authenticate using OpenLdap(Pam-Ldap) in CentOS ?

185  Manu Chacko March 27, 2025  Tweaks & Configuration

Integration of Open-LDAP (PAM-LDAP) in CentOS

Overview: This article details how to integrate OpenLDAP (PAM-LDAP) with CentOS for SSH authentication using Ezeelogin. It covers installing PHP-LDAP, configuring LDAP settings via the web GUI, and setting up PAM_LDAP for SSH access. Verification steps ensure imported LDAP users are correctly configured for seamless integration.

Make sure that the PHP-LDAP extension is installed on the server. 

root@gateway:~# yum install php-ldap openldap openldap-clients ;apachectl restart

Step 1:  Login to Web-GUI -> Settings -> LDAP

 Add the details of LDAP configurations

Multiple URIs or a list of URIs can be specified in the format: 

  • ldaps://host.com:636/ ldaps://host.com:636/

(Only the protocol, hostname, and port fields are allowed.)

Step 2: Under Settings -> General -> Authentication -> change web panel authentication to LDAP & Enable External SSH Auth

Step 3: Select the LDAP users and import them to Ezeelogin
 

You can confirm the imported LDAP users were listed in the Users. Now you can log in to Ezeelogin GUI as an LDAP user.

Note:   After importing the users to Ezeelogin, log in with the user and set up the security code for the user under Account -> Password -> New Security Code.

Let's configure PAM_LDAP Authentication for SSH  

Login to the Ezeelogin ssh server to configure pam-LDAP
 
Step 1: Install pam-LDAP module by the following command

root@gateway:~# yum install nss-pam-ldapd nscd  

Step 2:  Enter the command to auto-configure  

root@gateway:~# authconfig-tui  

 Step 3: Select use LDAP & use LDAP authentication 
 
 
Step 4:  Add Binddn & bind password to /etc/nslcd.conf  
 

root@gateway:~# vi /etc/nslcd.conf

binddn cn=admin,dc=eztest,dc=net

bindpw chaSD@#234JH56hj^7

map passwd loginShell  "/usr/local/bin/ezsh" 

Step 5: Enable autocreate home directory on login by the following command . 

root@gateway:~# authconfig --enablemkhomedir --update 

Step 6: Restart nslcd & nscd service.

root@gateway:~# service nslcd restart && service nscd restart  

Note: 

Ensure the login shell of the LDAP user is /usr/local/bin/ezsh

Step 7: Now run the id/finger command and see whether you are able to get LDAP user details 
 

root@gateway:~# finger jake

Login: jake          Name: jake t

Directory: /home/jake     Shell: /usr/local/bin/ezsh

Last login Wed Jun 13 05:02 (EDT) on pts/1 from 10.1.1.13

No mail.

No Plan.

root@gateway:~# id jake

uid=1001(jake) gid=20001(domain users) groups=1547600513(domain users)

Step 8: Run an ldapsearch to ensure that results are correctly fetched from the LDAP server.
 

root@gateway:~# ldapsearch -v -x -H ldap://10.11.1.164 -b "cn=jake j,cn=Users,dc=ad2016,dc=admod,dc=net" -D "cn=administrator,dc=ad2016,dc=admod,dc=net" -w redhat


ldap_initialize( ldap://10.11.1.103:389/??base )
filter: (objectclass=*)
requesting: All userApplication attributes
# extended LDIF
#
# LDAPv3
# base <cn=jake j,dc=ad2016,dc=admod,dc=net> with scope subtree
# filter: (objectclass=*)
# requesting: ALL
#

# jake j, ad2016.admod.net
dn: cn=jake j,dc=ad2016,dc=admod,dc=net
cn: jake j
givenName: jake
gidNumber: 500
sn: j
objectClass: inetOrgPerson
objectClass: posixAccount
objectClass: top
userPassword:: e01ENX15VHpOZUxJSFpTZzBZaGF6c3ZjQjVnPT0=
uidNumber: 1001
uid: jake
homeDirectory: /home/jake
loginShell: /usr/local/bin/ezsh

# search result
search: 2
result: 0 Success

# numResponses: 2
# numEntries: 1

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