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<#
  In this example:
  1. Active Directory domain: base.local
  2. Domain controller 1: dc.base.local
  3. Domain controller 2: bdc.base.local
  4. Test username: base\chrissy
  
  Note: Make sure your DNS servers are your AD DNS servers
#>

# Install required packages (ntp keeps your clock on time)
apt-get -y install krb5-user ntp ntpdate 

# To add your DC to the time server list, edit /etc/ntp.conf
service ntp stop
ntpdate -s ntp.ubuntu.org
service ntp start

# Next, edit your kerberos conf
vi /etc/krb5.conf

[libdefaults]
 ticket_lifetime = 24000
 default_realm = BASE.LOCAL
 dns_lookup_realm = false
 dns_lookup_kdc = false
 
[realms]
 BASE.LOCAL = {
  kdc = dc.base.local:88
  kdc = bdc.base.local:88
 }
 
[domain_realm]
 .base.local = BASE.LOCAL
 base.local = BASE.LOCAL
 
[appdefaults]
 pam = {
   debug = false
   ticket_lifetime = 36000
   renew_lifetime = 36000
   forwardable = true
   krb4_convert = false
 }

# Get a ticket 
kinit chrissy

# Look at your ticket list
klist