【kerberos配置】Cannot contact any KDC for realm 'EXAMPLE.COM'

【求助kerberos配置】Cannot contact any KDC for realm 'EXAMPLE.COM'
最近涉及网络服务安全，需要配置kerberos遇到一个问题Cannot contact any KDC for realm 'EXAMPLE.COM' while getting initial credentials!!!搜了很多，一直没有解决，如有牛人帮助解决，积分送上！在red hat 5中配置kerberos
  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
 }

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
127.0.0.1 localhost.localdomain localhost
192.168.0.201 kerberos.example.com kerberos

防火墙关闭
and DNS设置如下
localhost.localdomain
192.168.0.1

把admin添加成数据库管理员
in kadmin.local
I got this:
kadmin.loal:listprincs
kadmin.local: listprincs
K/M@EXAMPLE.COM
admin/admin@EXAMPLE.COM
kadmin/admin@EXAMPLE.COM
kadmin/changepw@EXAMPLE.COM
kadmin/localhost.localdomain@EXAMPLE.COM
krbtgt/EXAMPLE.COM@EXAMPLE.COM

admin显示添加成功但是kinit的显示无法连接kdc
[root@localhost krb5kdc]# /usr/local/bin/kinit admin/admin
kinit: Cannot contact any KDC for realm 'EXAMPLE.COM' while getting
initial credentials



[解决办法]
ip设置问题，搞成一样的，避免冲突，使用ifconfig查看，更改housts