[libdefaults]
    default_realm = IGROUP.COM
    ticket_lifetime = 24h
    renew_lifetime = 7d
    forwardable = true

# The following krb5.conf variables are only for MIT Kerberos.
    krb4_config = /etc/krb.conf
    krb4_realms = /etc/krb.realms
    kdc_timesync = 1
    ccache_type = 4
    forwardable = true
    proxiable = true

# The following encryption type specification will be used by MIT Kerberos
# if uncommented.  In general, the defaults in the MIT Kerberos code are
# correct and overriding these specifications only serves to disable new
# encryption types as they are added, creating interoperability problems.
#
# Thie only time when you might need to uncomment these lines and change
# the enctypes is if you have local software that will break on ticket
# caches containing ticket encryption types it doesn't know about (such as
# old versions of Sun Java).

#   default_tgs_enctypes = des3-hmac-sha1
#   default_tkt_enctypes = des3-hmac-sha1
#   permitted_enctypes = des3-hmac-sha1

# The following libdefaults parameters are only for Heimdal Kerberos.
    v4_instance_resolve = false
    v4_name_convert = {
        host = {
            rcmd = host
            ftp = ftp
        }
        plain = {
            something = something-else
        }
    }
    fcc-mit-ticketflags = true

[realms]
    IGROUP.COM = {
        kdc = igroup.com
        admin_server = igroup.com
    }

[kdcdefaults]
    kdc_ports = 750,88

[realms]
    IGROUP.COM = {
        database_name = /var/lib/krb5kdc/principal
        admin_keytab = FILE:/etc/krb5kdc/kadm5.keytab
        acl_file = /etc/krb5kdc/kadm5.acl
        key_stash_file = /etc/krb5kdc/stash
        kdc_ports = 750,88
        max_life = 10h 0m 0s
        max_renewable_life = 7d 0h 0m 0s
        master_key_type = des3-hmac-sha1
        supported_enctypes = aes256-cts:normal arcfour-hmac:normal des3-hmac-sha1:normal des-cbc-crc:normal des:normal des:v4 des:norealm des:onlyrealm des:afs3
        default_principal_flags = +preauth
    }

kdb5_util create -s

kadmin.local:addprinc -randkey host/ashokkrishna-Lenovo-B560
kadmin.local: ktadd -k /tmp/kdb5.keytab host/ashokkrishna-Lenovo-B560



 ashokkrishna@10:04:56:~$ klist
    Ticket cache: FILE:/tmp/krb5cc_1000_cK2wUG
    Default principal: ashokkrishna@IGROUP.COM

    Valid starting       Expires              Service principal
    2015-06-29T10:01:11  2015-06-29T20:01:11  krbtgt/IGROUP.COM@IGROUP.COM
        renew until 2015-07-06T10:01:09

ashokkrishna@10:07:16:~$ sudo klist -k
Keytab name: FILE:/etc/krb5.keytab
KVNO Principal
---- --------------------------------------------------------------------------
   2 host/ashokkrishna-Lenovo-B560@IGROUP.COM
   2 host/ashokkrishna-Lenovo-B560@IGROUP.COM
   2 host/ashokkrishna-Lenovo-B560@IGROUP.COM
   2 host/ashokkrishna-Lenovo-B560@IGROUP.COM

GSSAPIAuthentication yes
GSSAPICleanupCredentials yes

#ssh 127.0.0.1
The authenticity of host '127.0.0.1 (127.0.0.1)' can't be established.
ECDSA key fingerprint is f9:6a:ea:81:fc:7a:b1:da:12:17:95:c6:5d:d5:25:7e.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '127.0.0.1' (ECDSA) to the list of known hosts.
ashokkrishna@127.0.0.1's password: