[root@san1 ~]# cat /etc/krb5.conf 
[logging]
 default = FILE:/var/log/krb5libs.log
 kdc = FILE:/var/log/krb5kdc.log
 admin_server = FILE:/var/log/kadmind.log

[libdefaults]
 default_realm = in.newsweb.fr
 dns_lookup_realm = false
 dns_lookup_kdc = false
 ticket_lifetime = 24h
 forwardable = yes

[realms]
 EXAMPLE.COM = {
  kdc = kerberos.example.com:88
  admin_server = kerberos.example.com:749
  default_domain = example.com
 }

 PDC = {
  kdc = pdc.in.newsweb.fr
 }

 PDC.IN.NEWSWEB.FR = {
  kdc = pdc.in.newsweb.fr
 }

 in.newsweb.fr = {
  kdc = pdc.in.newsweb.fr:88
  admin_server = pdc.in.newsweb.fr:749
 }

 IN.NEWSWEB.FR = {
  kdc = pdc.in.newsweb.fr
 }

[domain_realm]
 .example.com = EXAMPLE.COM
 example.com = EXAMPLE.COM

[kdc]
 profile = /var/kerberos/krb5kdc/kdc.conf

[appdefaults]
 pam = {
   debug = false
   ticket_lifetime = 36000
   renew_lifetime = 36000
   forwardable = true
   krb4_convert = false
 }