configure Kerberos to provide user authentication

Install kerberos server packages

[root@auth1 /]# yum install krb5-server

Add the following rules to iptables


-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 88 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 88 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 464 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 464 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 749 -j ACCEPT

Edit the kdc conf file

[root@auth1 /]# vim /var/kerberos/krb5kdc/kdc.conf

[kdcdefaults]

 v4_mode = nopreauth

 kdc_tcp_ports = 88

[realms]

 auth1.EXAMPLE.COM = {

  #master_key_type = des3-hmac-sha1

  default_priniciple_flags = +preauth

  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 des-cbc-crc:v4 des-cbc-crc:afs3

 }

Initialise the database

[root@auth1 /]# kdb5_util create

Log in as kadmin.local and create the princs

[root@auth1 /]# kadmin.local