Kerberos Server configurations
kerberos server :- adp031.tuxhub.com
kerberos client :- adp032.tuxhub.com
RELEM :- TUXHUB.COM
1) Install Packages :
[root@adp031 ~]# yum install krb5-libs krb5-server krb5-workstation
2) Edit config file :
[root@adp031 ~]# 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 = TUXHUB.COM
dns_lookup_realm = false
dns_lookup_kdc = false
ticket_lifetime = 24h
renew_lifetime = 7d
forwardable = true
[realms]
TUXHUB.COM = {
kdc = adp031.tuxhub.com
admin_server = adp031.tuxhub.com
}
[domain_realm]
.tuxhub.com = TUXHUB.COM
tuxhub.com = TUXHUB.COM
[root@adp031 ~]#
3) Edit kerberos database config file
[root@adp031 ~]# cat /var/kerberos/krb5kdc/kdc.conf
[kdcdefaults]
kdc_ports = 88
kdc_tcp_ports = 88
[realms]
TUXHUB.COM = {
master_key_type = aes256-cts
acl_file = /var/kerberos/krb5kdc/kadm5.acl
dict_file = /usr/share/dict/words
admin_keytab = /var/kerberos/krb5kdc/kadm5.keytab
supported_enctypes = aes256-cts:normal aes128-cts:normal des3-hmac-sha1:normal arcfour-hmac:normal des-hmac-sha1:normal des-cbc-md5:normal des-cbc-crc:normal
}
[root@adp031 ~]#
4) Setup database for kdc.
[root@adp031 ~]# kdb5_util create -s
Loading random data
Initializing database '/var/kerberos/krb5kdc/principal' for realm 'TUXHUB.COM',
master key name 'K/M@TUXHUB.COM'
You will be prompted for the database Master Password.
It is important that you NOT FORGET this password.
Enter KDC database master key:
Re-enter KDC database master key to verify:
5) Edit acl file :
[root@adp031 ~]# cat /var/kerberos/krb5kdc/kadm5.acl
*/admin@TUXHUB.COM *
[root@adp031 ~]#
6) Create kerberos principle
[root@adp031 ~]# kadmin.local
Authenticating as principal root/admin@TUXHUB.COM with password.
kadmin.local: addprinc root/admin
WARNING: no policy specified for root/admin@TUXHUB.COM; defaulting to no policy
Enter password for principal "root/admin@TUXHUB.COM":
Re-enter password for principal "root/admin@TUXHUB.COM":
Principal "root/admin@TUXHUB.COM" created.
7) Start services
[root@adp031 ~]# /etc/init.d/krb5kdc start
Starting Kerberos 5 KDC: [ OK ]
[root@adp031 ~]# /etc/init.d/kadmin start
Starting Kerberos 5 Admin Server: [ OK ]
[root@adp031 ~]#
[root@adp031 ~]# chkconfig krb5kdc on
[root@adp031 ~]# chkconfig kadmin on
8) Check configuration
[root@adp031 ~]# kinit root/admin@TUXHUB.COM
Password for root/admin@TUXHUB.COM:
9) Verify TGT
[root@adp031 ~]# klist
Ticket cache: FILE:/tmp/krb5cc_0
Default principal: root/admin@TUXHUB.COM
Valid starting Expires Service principal
10/21/15 15:50:57 10/22/15 15:50:57 krbtgt/TUXHUB.COM@TUXHUB.COM
renew until 10/21/15 15:50:57
[root@adp031 ~]#
Kerberos Client configurations:
1) Install packages :
[root@adp032 ~]$ sudo yum install krb5-libs krb5-workstation
2) Copy krb5.conf file from server to all client node.
[root@adp031 ~]# scp -pr /etc/krb5.conf adp032:/etc/
root@adp032's password:
krb5.conf 100% 437 0.4KB/s 00:00
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