在本教程中，我们将讨论如何将 Linux 服务器（Centos/RHEL）与 Windows Active Directory 集成以进行身份验证。
就我而言，我有 Centos/RHEL 6 服务器。
按照以下步骤使用 samba、winbind 和 Kerberos 将这些服务器与 AD 集成。

步骤 1：安装 samba-winbind 和 kerberos 包。

# yum install samba-winbind samba-winbind-clients samba krb5-libs  krb5-workstation pam_krb5

步骤 2：时间同步。

AD 对认证过程中的时间匹配非常挑剔。
所以linux服务器和AD服务器时间应该同步到ntp服务器。
使用以下命令将 Linux 服务器的时间与 ntp 服务器同步。

# ntpdate [ntp-server-ip-address/dns-name]

要使上述配置永久编辑，请编辑文件“/etc/ntp.conf”，然后将其中的内容替换为我们域中的一个或者多个 NTP 服务器，例如：

# vi /etc/ntp.conf
server [ntp-server-ip-address/dns-name]

启动服务：

# /etc/init.d/ntpd start
# chkconfig ntpd on

步骤 3：编辑 /etc/hosts 文件。

# vi /etc/hosts
[ip-address]  adserver.yourdomain adserver

步骤 4：编辑 /etc/krb5.conf。

# vi /etc/krb5.conf
[domain_realm]
yourdomain = YOURDOMAIN
[libdefaults]
    ticket_lifetime = 24000
    default_realm = YOURDOMAIN
    dns_lookup_realm = true
    dns_lookup_kdc = false
    cache_type = 1
    forwardable = true
    proxiable = true
    default_tgs_enctypes = des3-hmac-sha1 des-cbc-crc
    permitted_enctypes = des3-hmac-sha1 des-cbc-crc
    allow_weak_crypto = no
[realms] 
    YOURDOMAIN = {
    kdc = [ip address of AD server:Port]
    admin_server = [ip address of AD server:Port]
    default_domain = yourdomain
  }

[appdefaults]
  pam = {
    debug = true
    ticket_lifetime = 36000
    renew_lifetime = 36000
    forwardable = true
    krb4_convert = false
  }
[logging]
  default = FILE:/var/krb5/kdc.log
  kdc = FILE:/var/krb5/kdc.log
  admin_server = FILE:/var/log/kadmind.log

步骤 5：现在测试 Kerberos 身份验证。

# kinit [user-name]

如果它提示输入密码，输入用户AD密码，如果一切正常，那么我们会得到提示，否则重新检查 krb5.conf 文件。

步骤 6：现在配置 Samba 和 Winbind。

编辑 /etc/samba/smb.conf 。

# vi /etc/samba/smb.conf
[global]
    workgroup = [Workgroup-Name]
    netbios name = site2       ## replace the site2 with hostname
    realm = 
    security = ADS
    template shell = /bin/bash
    idmap backend = tdb
    idmap uid = 1-100000000
    idmap gid = 1-100000000
    winbind use default domain = Yes
    winbind nested groups = Yes
    winbind enum users = Yes
    winbind enum groups = Yes
    template shell = /bin/bash
    template homedir = /home/%D/%U
    winbind separator = /
    winbind nss info = sfu
    winbind offline logon = true
    hosts allow = 127.0.0.1 0.0.0.0/0
    obey pam restrictions = yes
    socket options = TCP_NODELAY
    max log size = 150
    passdb backend = tdbsam
    printing = cups
    load printers = yes
    cups options = raw
    printcap name = cups
    disable spoolss = Yes
    show add printer wizard = No
    interfaces = eth0 lo
    bind interfaces only = yes
    winbind refresh tickets = true
    log file = /var/log/samba/log.%m
    max log size = 50
    log level = 3
    encrypt passwords = yes
    #map untrusted to domain = yes
    #auth methods = winbind guest sam
    map untrusted to domain = Yes
[printers]
    comment = All Printers
    path = /var/spool/samba
    browseable = yes
    public = yes
    guest ok = yes
    writable = no
    printable = yes

步骤 7：配置 /etc/nsswitch.conf 文件以处理身份验证。

# vi /etc/nsswitch.conf
passwd:   compat winbind
shadow:   winbind
group:      compat winbind

步骤 8：现在重新启动 winbind 和 Samba 服务。

# /etc/init.d/smb restart
# /etc/init.d/winbind restart

现在加入域：

# net ads join -U [User Name]

如果上述命令报告“Join is OK”，则测试winbind：

列出所有 AD 用户的命令：

# wbinfo -u

步骤 9：现在进行测试并尝试通过 AD 用户凭据登录到 linux 服务器。

# ssh [username]@[ipaddress or hostname of linux server]