###unit.8 ldap网络帐号###

###1.ldap是什么
ldap目录服务认证,和windows活动目录类似,就是记录数据的一种方式

###2.ldap客户端所需软件
yum install sssd krb5-workstation -y

###3.如何开启ldap用户认证
authcofig-tui

authconfig-tui

┌────────────────┤ Authentication Configuration ├─────────────────┐
│                                                                 │
│  User Information        Authentication                         │
│  [ ] Cache Information   [ ] Use MD5 Passwords                  │
│  [*] Use LDAP            [*] Use Shadow Passwords               │
│  [ ] Use NIS             [ ] Use LDAP Authentication            │
│  [ ] Use IPAv2           [*] Use Kerberos                       │
│  [ ] Use Winbind         [ ] Use Fingerprint reader             │
│                          [ ] Use Winbind Authentication         │
│                          [*] Local authorization is sufficient  │
│                                                                 │
│            ┌────────┐                      ┌──────┐             │
│            │ Cancel │                      │ Next │             │
│            └────────┘                      └──────┘             │
│                                                                 │
│                                                                 │
└─────────────────────────────────────────────────────────────────┘
                                                                                           


┌─────────────────┤ LDAP Settings ├─────────────────┐
│                                                   │
│          [*] Use TLS                              │
│  Server: ldap://classroom.example.com/___________ │
│ Base DN: dc=example,dc=com_______________________ │
│                                                   │
│         ┌──────┐                ┌──────┐          │
│         │ Back │                │ Next │          │
│         └──────┘                └──────┘          │
│                                                   │
│                                                   │
└───────────────────────────────────────────────────┘
                                                      



┌─────────────────┤ Kerberos Settings ├──────────────────┐
│                                                        │
│        Realm: EXAMPLE.COM_____________________________ │
│          KDC: classroom.example.com___________________ │
│ Admin Server: classroom.example.com___________________ │
│               [ ] Use DNS to resolve hosts to realms   │
│               [ ] Use DNS to locate KDCs for realms    │
│                                                        │
│          ┌──────┐                    ┌────┐            │
│          │ Back │                    │ Ok │            │
│          └──────┘                    └────┘            │
│                                                        │
│                                                        │
└────────────────────────────────────────────────────────┘
                                                          
<当出现以下报错时>

┌────────────────┤ Warning ├─────────────────┐
│                                            │
│ To connect to a LDAP server with TLS       │
│ protocol enabled you need a CA certificate │
│ which signed your server's certificate.    │
│ Copy the certificate in the PEM format to  │
│ the '/etc/openldap/cacerts' directory.     │
│ Then press OK.                             │
│                                            │
│                  ┌────┐                    │
│                  │ Ok │                    │
│                  └────┘                    │
│                                            │
│                                            │
└────────────────────────────────────────────┘
                                                                                

时因为tls的证书缺失,需要到服务器端下载所需要的证书到/etc/openldap/cacerts,用到命令
wget http:/172.25.254.254/pub/example-ca.crt

测试
getent passwd ldapuser1
如果用户信息可以正常显示,证明客户端认证成功

4.自动挂载用户家目录
yum install autofs -y
vim /etc/autofs.master
/home/guests    /etc/auto.ldap

vim /etc/auto.ldap
ldapuser1    172.25.254.254:/home/guests/ldapuser1
+++++++++++++++++++++++++++++++++++++++++++++++++++++++
*        172.25.254.254:/home/guests/&

systemctl restart autofs