【求助悬赏20分】小女初学kerberos，遇Cannot contact any KDC for realm 'EXAMPLE.COM'...错误

这两天刚学习在red hat 5下配置kerberos，设置数据库管理员admin之后，测试的kinit总是提示Cannot contact any KDC for realm 'EXAMPLE.COM' while getting initial credentials!!!
  上网搜索，关了防火墙，etc/hosts重设之后还是解决不了，我的配置文件krb和kdc如下：
krb.conf
[logging]
 default = FILE:/var/log/krb5libs.log
 kdc = FILE:/var/log/krb5kdc.log
 admin_server = FILE:/var/log/kadmind.log

[libdefaults]
 default_realm = EXAMPLE.COM
 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
 }

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

[kdc]
 profile = /usr/local/var/krb5kdc/kdc.conf

[appdefaults]
 pam = {
  debug = false
  ticket_lifetime = 36000
  renew_lifetime = 36000
  forwardable = true
  krb4_convert = false
 }
另一个配置文件如下：
kdc.conf
[kdcdefaults]
 acl_file = /usr/local/var/krb5kdc/kadm5.acl
 dict_file = /usr/share/dict/words
 admin_keytab = /usr/local/var/krb5kdc/kadm5.keytab
 v4_mode = nopreauth

[realms]
 EXAMPLE.COM = {
  master_key_type = des3-hmac-sha1
  supported_enctypes = 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
 }

hosts的设置
127.0.0.1 localhost.localdomain localhost
192.168.0.201 kerberos.example.com kerberos

and DNS的设置
localhost.localdomain
192.168.0.1

加过admin之后kadmin.local可以在listprincs中看到
kadmin.loal:listprincs
kadmin.local: listprincs
K/[email protected]
admin/[email protected]
kadmin/[email protected]
kadmin/[email protected]
kadmin/[email protected]
krbtgt/[email protected]

可以看到已经加进去了，但是kinit检测的时候却：
[root@localhost krb5kdc]# /usr/local/bin/kinit admin/admin
kinit: Cannot contact any KDC for realm 'EXAMPLE.COM' while getting
initial credentials


这个问题困扰我好几天了，积分不多，如能解决小女子将20分送上！

最后发现是IP设置有问题，与局域网内的有冲突，修改ip之后就可以了，另外ifconfig查看与hosts设置的地址要一样。

ip设置问题，搞成一样的，避免冲突，使用ifconfig查看，更改housts