OpenLDAP for ISP on RedHat Enterprise 6

This posts shows step by step of installing OpenLDAP on RHEL 6.
The next post will shows how to add more LDAP objects and AAA attributes that often being used in Internet Service Provider environment (such as Framed-IP-Address, NAS-Port-ID...)

1. Installing compiler tools
RHEL doesn't install this by default. At least that's true to me.
Refer to this
2. Installing Prerequisites software
2.1. Installing Oracle Berkeley Database
[root@openldap db-5.1.25]# cd build_unix
[root@openldap db-5.1.25]# ../dist/configure
[root@openldap db-5.1.25]# make
[root@openldap db-5.1.25]# make install

2.2. Installing OpenSSL
Get it (Require internet connection to the server)
[root@openldap tmp]# wget http://www.openssl.org/source/openssl-1.0.0d.tar.gz
Install it
[root@openldap tmp]# tar zxvf openssl-1.0.0d.tar.gz
[root@openldap openssl-1.0.0d]# ./config
[root@openldap openssl-1.0.0d]# make
[root@openldap openssl-1.0.0d]# make install

2.3. Installing Cyrus SASL
Install Cyrus SASL from RHEL DVD: [root@openldap Packages]# rpm -Uvh cyrus-sasl-2.1.23-8.el6.x86_64.rpm
2.4. Installing Kerberos Authentication Service
3. Installing OpenLDAP
3.1. Get the latest version
http://www.openldap.org/software/download/
3.2. Compile and install
CPPFLAGS="-I/usr/local/BerkeleyDB.4.7/include"
export CPPFLAGS
LDFLAGS="-L/usr/local/lib -L/usr/local/BerkeleyDB.4.7/lib -R/usr/local/BerkeleyDB.4.7/lib"
export LDFLAGS
LD_LIBRARY_PATH="/usr/local/BerkeleyDB.4.7/lib"
export LD_LIBRARY_PATH4. Configuring OpenLDAP

4.1. Create database for storing config information (config DIT)
4.2. Create database for root DIT
In this example, root DIT is: dc=test, dc=com