How to Install and Configure 389 LDAP Directory Server on CentOS 6.5

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Install and Configure 389 LDAPA directory server provides a centralized directory service for your organization. It is alternative to windows active directory. This post will describes how to install and configure 389 LDAP Directory Server with a basic Lightweight Directory Access Protocol (LDAP) directory implementation. 389 Directory Server was formerly known as the Fedora Directory Server and it is an enterprise-class open source LDAP. 389 Directory server has been developed by Red Hat, as part of Red Hat’s community-supported Fedora Project.

Steps to Install and Configure 389 LDAP Directory Server

TCP and Files system Tuning :
a) Decrease the time default value for tcp_keepalive_time connection. Edit the /etc/sysctl.conf file and add the following lines to the bottom of sysctl.conf ”

[[email protected] ~]# echo "net.ipv4.tcp_keepalive_time = 300" >> /etc/sysctl.conf
b) Increase number of local system ports available by editing this parameter in the /etc/sysctl.conf file :
[[email protected] ~]# echo "net.ipv4.ip_local_port_range = 1024 65000" >> /etc/sysctl.conf

c) Increase the file descriptors by running these commands:

[[email protected] ~]# echo "64000" > /proc/sys/fs/file-max
[[email protected] ~]# echo "fs.file-max = 64000" >> /etc/sysctl.conf

d) Increase ulimit in /etc/profile :

[[email protected] ~]# echo "ulimit -n 8192" >> /etc/profile

389 Installation :

1. Prepare EPEL Repository on CentOS 6 :
How to Prepare EPEL Repository on CentOS 6

What packages and versions are available in EPEL?
You can take a look on any of the available EPEL mirrors from our mirror list

Alternately, you can browse the package set using repoview:

2. Configure hostname, FQDN and host file has been configured correctly :

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

192.168.0.5     ldap.ehowstuff.local

3. Make sure selinux is disabled :
Disable SELinux on CentOS 6.5

4. Install the 389 Directory Server packages :

[[email protected] ~]# yum install 389-ds -y

5. Fix Error: command ‘getsebool httpd_can_connect_ldap’ failed – output [getsebool: SELinux is disabled :

[[email protected] ~]# mkdir ~/bin
[[email protected] ~]# vi ~/bin/getsebool
#!/bin/sh
echo on
exit 0
[[email protected] ~]# vi ~/bin/setsebool
#!/bin/sh
exit 0
[[email protected] ~]# chmod +x ~/bin/*sebool

6. Run setup script to start configure the ldap service :

[[email protected] ~]# PATH=~/bin:$PATH setup-ds-admin.pl

==============================================================================
This program will set up the 389 Directory and Administration Servers.

It is recommended that you have "root" privilege to set up the software.
Tips for using this program:
  - Press "Enter" to choose the default and go to the next screen
  - Type "Control-B" then "Enter" to go back to the previous screen
  - Type "Control-C" to cancel the setup program

Would you like to continue with set up? [yes]:

==============================================================================
Your system has been scanned for potential problems, missing patches,
etc.  The following output is a report of the items found that need to
be addressed before running this software in a production
environment.

389 Directory Server system tuning analysis version 23-FEBRUARY-2012.

NOTICE : System is x86_64-unknown-linux2.6.32-431.el6.x86_64 (1 processor).

Would you like to continue? [yes]:

==============================================================================
Choose a setup type:

   1. Express
       Allows you to quickly set up the servers using the most
       common options and pre-defined defaults. Useful for quick
       evaluation of the products.

   2. Typical
       Allows you to specify common defaults and options.

   3. Custom
       Allows you to specify more advanced options. This is
       recommended for experienced server administrators only.

To accept the default shown in brackets, press the Enter key.

Choose a setup type [2]:

==============================================================================
Enter the fully qualified domain name of the computer
on which you're setting up server software. Using the form
.
Example: eros.example.com.

To accept the default shown in brackets, press the Enter key.

Warning: This step may take a few minutes if your DNS servers
can not be reached or if DNS is not configured correctly.  If
you would rather not wait, hit Ctrl-C and run this program again
with the following command line option to specify the hostname:

    General.FullMachineName=your.hostname.domain.name

Computer name [ldap.ehowstuff.local]:

WARNING: There are problems with the hostname.
Hostname 'ldap.ehowstuff.local' is valid, but none of the IP addresses
resolve back to ldap.ehowstuff.local
- address 192.168.0.5 resolves to host centos6.5.ehowstuff.local

Please check the spelling of the hostname and/or your network configuration.
If you proceed with this hostname, you may encounter problems.

Do you want to proceed with hostname 'ldap.ehowstuff.local'? [no]: yes

==============================================================================
The servers must run as a specific user in a specific group.
It is strongly recommended that this user should have no privileges
on the computer (i.e. a non-root user).  The setup procedure
will give this user/group some permissions in specific paths/files
to perform server-specific operations.

If you have not yet created a user and group for the servers,
create this user and group using your native operating
system utilities.

System User [nobody]:
System Group [nobody]:

==============================================================================
Server information is stored in the configuration directory server.
This information is used by the console and administration server to
configure and manage your servers.  If you have already set up a
configuration directory server, you should register any servers you
set up or create with the configuration server.  To do so, the
following information about the configuration server is required: the
fully qualified host name of the form
.(e.g. hostname.example.com), the port number
(default 389), the suffix, the DN and password of a user having
permission to write the configuration information, usually the
configuration directory administrator, and if you are using security
(TLS/SSL).  If you are using TLS/SSL, specify the TLS/SSL (LDAPS) port
number (default 636) instead of the regular LDAP port number, and
provide the CA certificate (in PEM/ASCII format).

If you do not yet have a configuration directory server, enter 'No' to
be prompted to set up one.

Do you want to register this software with an existing
configuration directory server? [no]:

==============================================================================
Please enter the administrator ID for the configuration directory
server.  This is the ID typically used to log in to the console.  You
will also be prompted for the password.

Configuration directory server
administrator ID [admin]:
Password:
Password (confirm):

==============================================================================
The information stored in the configuration directory server can be
separated into different Administration Domains.  If you are managing
multiple software releases at the same time, or managing information
about multiple domains, you may use the Administration Domain to keep
them separate.

If you are not using administrative domains, press Enter to select the
default.  Otherwise, enter some descriptive, unique name for the
administration domain, such as the name of the organization
responsible for managing the domain.

Administration Domain [ehowstuff.local]:

==============================================================================
The standard directory server network port number is 389.  However, if
you are not logged as the superuser, or port 389 is in use, the
default value will be a random unused port number greater than 1024.
If you want to use port 389, make sure that you are logged in as the
superuser, that port 389 is not in use.

Directory server network port [389]:

==============================================================================
Each instance of a directory server requires a unique identifier.
This identifier is used to name the various
instance specific files and directories in the file system,
as well as for other uses as a server instance identifier.

Directory server identifier [ldap]:

==============================================================================
The suffix is the root of your directory tree.  The suffix must be a valid DN.
It is recommended that you use the dc=domaincomponent suffix convention.
For example, if your domain is example.com,
you should use dc=example,dc=com for your suffix.
Setup will create this initial suffix for you,
but you may have more than one suffix.
Use the directory server utilities to create additional suffixes.

Suffix [dc=ehowstuff, dc=local]:

==============================================================================
Certain directory server operations require an administrative user.
This user is referred to as the Directory Manager and typically has a
bind Distinguished Name (DN) of cn=Directory Manager.
You will also be prompted for the password for this user.  The password must
be at least 8 characters long, and contain no spaces.
Press Control-B or type the word "back", then Enter to back up and start over.

Directory Manager DN [cn=Directory Manager]:
Password:
Password (confirm):

==============================================================================
The Administration Server is separate from any of your web or application
servers since it listens to a different port and access to it is
restricted.

Pick a port number between 1024 and 65535 to run your Administration
Server on. You should NOT use a port number which you plan to
run a web or application server on, rather, select a number which you
will remember and which will not be used for anything else.

Administration port [9830]:

==============================================================================
The interactive phase is complete.  The script will now set up your
servers.  Enter No or go Back if you want to change something.

Are you ready to set up your servers? [yes]:
Creating directory server . . .
Warning: Hostname ldap.ehowstuff.local is valid, but none of the IP addresses
resolve back to ldap.ehowstuff.local
        address 192.168.0.5 resolves to host centos6.5.ehowstuff.local
Your new DS instance 'ldap' was successfully created.
Creating the configuration directory server . . .
Beginning Admin Server reconfiguration . . .
Creating Admin Server files and directories . . .
Updating adm.conf . . .
Updating admpw . . .
Registering admin server with the configuration directory server . . .
Updating adm.conf with information from configuration directory server . . .
Updating the configuration for the httpd engine . . .
Starting admin server . . .
output: Starting dirsrv-admin:
output:                                                    [  OK  ]
The admin server was successfully started.
Admin server was successfully reconfigured and started.
Exiting . . .
Log file is '/tmp/setupGwS8hs.log'

7. Start dirsrv and dirsrv-admin service :

[[email protected] ~]# /etc/init.d/dirsrv start
[[email protected] ~]# /etc/init.d/dirsrv-admin start

8. Make dirsrv and dirsrv-admin service auto start at boot :

[[email protected] ~]# chkconfig dirsrv on
[[email protected] ~]# chkconfig dirsrv-admin on

9. Configure Iptables to allow server listen on port 22, 389 and 9830 :

# Firewall configuration written by system-config-firewall
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 389 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 9830 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT

Restart iptables to take effect the changes :

[[email protected] ~]# service iptables restart
iptables: Applying firewall rules: [ OK ]

10. Verify port listen by the server using netstat :

[[email protected] ~]# netstat -plunt | grep LISTEN
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 1083/rpcbind
tcp 0 0 0.0.0.0:10000 0.0.0.0:* LISTEN 1125/perl
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1116/sshd
tcp 0 0 0.0.0.0:9830 0.0.0.0:* LISTEN 1508/httpd.worker
tcp 0 0 127.0.0.1:9000 0.0.0.0:* LISTEN 1126/php-fpm
tcp 0 0 :::8140 :::* LISTEN 1161/httpd
tcp 0 0 :::111 :::* LISTEN 1083/rpcbind
tcp 0 0 :::80 :::* LISTEN 1161/httpd
tcp 0 0 :::22 :::* LISTEN 1116/sshd
tcp 0 0 :::443 :::* LISTEN 1161/httpd
tcp 0 0 :::8443 :::* LISTEN 1161/httpd
tcp 0 0 :::389 :::* LISTEN 1391/./ns-slapd

11. Verify port listen by the server and opened by iptables firewall :

[[email protected] ~]# iptables -nL
Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0
ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22
ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:389
ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:9830
REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited

Chain FORWARD (policy ACCEPT)
target prot opt source destination
REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

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