Freeipa Client Installation
For more information on Red Hat's FreeIPA, visit freeipa.org
Description:
FreeIPA is an integrated security information management solution combining Linux (Fedora), 389 Directory Server, MIT Kerberos, NTP, DNS, Dogtag (Certificate System). It consists of a web interface and command-line administration tools, and provides centralized authentication, authorization and account information by storing data about user, groups, hosts and other objects necessary to manage computers on the network.
Pre-Requisites:
1. OS:
These instructions can be performed on
CentOS 6-7
RHEL 6-7
Debian Jessie (8) and later.
Ubuntu 15.04 and later.
2. Set host file entry:
Set host file entry so that the ipa client can resolve itself by its FQDN. This should be the first entry.
Set the host file in /etc/hosts
1.2.3.10 client.yourcompany.com client
3. Set the hostname to an FQDN:
Ensure that the hostname is set to a Fully Qualified Domain Name.
There are 2 steps to ensuring that the hostname is set correctly:
The first is editing the /etc/hostname file,
the second is by setting the hostname using hostnamectl.
client.yourcompany.com
hostnamectl set-hostname client.yourcompany.com
4. Set up proper DNS resolvers:
Next you will need to ensure that the client is resolving DNS from the IPA server.
To do this, either the adapter config can be set to include the DNS address of the
IPA server, or by modifying the /etc/resolv.conf file and adding the IPA
server IP as the primary nameserver.
RHEL & 
CentOS Installations:
In CentOS/RHEL, the network adapter can be found in /etc/sysconfig/network-scripts/ifcfg-enoxxxxx Edit the file, and add the following line, substituting 1.2.3.4 for the IP address of your IPA server.
DNS1=1.2.3.4
systemctl restart network.service
Debian & 
Ubuntu Installations:
In Debian Jessie/Ubuntu > 15.04, the network adapter can be found in /etc/network/interfaces Edit the file, and add the following line, substituting 1.2.3.4 for the IP address of your IPA server in the eth0 ip block.
dns-nameservers 1.2.3.4 1.2.3.5
systemctl restart networking.service
Manually Edit resolv.conf:
In order to set the nameserver manually, edit the /etc/resolv.conf file, and add the proper nameserver line, substituting 1.2.3.4 for the IP address of your IPA server. Ensure that the nameserver entries defining your IPA servers are the first in the nameserver list.
nameserver 1.2.3.4
Install the IPA Client:
Install RHEL / CentOS Client:
1. Install Epel:
yum install -y epel-release
2. Install the ipa client:
yum install -y ipa-client
3. Register the client:
ipa-client-install --no-ntp --no-dns-sshfp --mkhomedir --enable-dns-updates --ssh-trust-dns
RESULT OUTPUT HERE
Install Debian / Ubuntu Client:
1. Install the numeezy repository:
The team over at numeezy already maintains a freeipa client for Debian/ubuntu,
so instead of rolling our own, we are going to use theirs.
wget -qO - http://apt.numeezy.fr/numeezy.asc | apt-key add -
echo -e 'deb http://apt.hgb.fr jessie main' >> /etc/apt/sources.list
2. Install the ipa client:
apt-get update
apt-get install -y freeipa-client
3. Create certificate directory:
mkdir -p /etc/pki/nssdb
4. Create an empty certificate directory:
certutil -N -d /etc/pki/nssdb
5. Create IPA root directory:
mkdir -p /var/run/ipa
6. Remove Existing Client Configure:
rm -f /etc/ipa/default.conf
7. Register the client:
ipa-client-install --no-ntp --no-dns-sshfp --mkhomedir --enable-dns-updates --ssh-trust-dns
TEXT OUTPUT HERE
8. Enable LDAP folder creation:
echo 'session required pam_mkhomedir.so' >> /etc/pam.d/common-session
9. Setup nsswitch.conf to use IPA:
Edit the /etc/nsswitch.conf file and change the following lines
passwd: files sss group: files sss shadow: files sss
Reboot:
Reboot the server
Post Requisites:
None