你好，Linux 新手。
我想要实现的目标：能够使用来自受信任域的 Active Directory 凭据登录 Linux 计算机。
我有以下设置：
+----------------+ +---------------+
+-----------+ | Forest B | | Forest A |
| User in | | | one-way trust | |
| domain B +----------+ Domain B +<--------------+ Domain A |
| | | b.net | | a.net |
+-----------+ | | | |
| | | |
+----------------+ +-------+-------+
|
|
|
|
|
+-------+-------+
| |
| Ubuntu 16.04 |
| samba 4.7.12 |
| |
| |
| |
+---------------+
我已使用 samba winbind 成功将我的 Ubuntu 16.04 添加到 Active Directory 域 A，但我无法使用域 B 中存在的用户帐户登录计算机。域 A 和域 B 是 Active Directory 域，并且它们具有单向信任这样域 A 信任域 B，但域 B 不信任域 A。
这是我的 smb.conf、krb5.conf 和 nsswitch.conf
/etc/samba/smb.conf
[global]
workgroup = A
security = ADS
realm = A.NET
encrypt passwords = yes
idmap config *:range = 16777216-33554431
allow trusted domains = yes
winbind trusted domains only = no
kerberos method = secrets and keytab
winbind refresh tickets = yes
template shell = /bin/bash
server string = %h server (Samba, Ubuntu)
dns proxy = no
log file = /var/log/samba/log.%m
max log size = 1000
syslog = 0
panic action = /usr/share/samba/panic-action %d
server role = standalone server
passdb backend = tdbsam
obey pam restrictions = yes
unix password sync = yes
passwd program = /usr/bin/passwd %u
passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
pam password change = yes
map to guest = bad user
usershare allow guests = yes
[printers]
comment = All Printers
browseable = no
path = /var/spool/samba
printable = yes
guest ok = no
read only = yes
create mask = 0700
[print$]
comment = Printer Drivers
path = /var/lib/samba/printers
browseable = yes
read only = yes
guest ok = no
/etc/krb5.conf
[libdefaults]
default_realm = A.NET
dns_lookup_kdc = false
krb4_config = /etc/krb.conf
krb4_realms = /etc/krb.realms
kdc_timesync = 1
ccache_type = 4
forwardable = true
proxiable = true
v4_instance_resolve = false
v4_name_convert = {
host = {
rcmd = host
ftp = ftp
}
plain = {
something = something-else
}
}
fcc-mit-ticketflags = true
[realms]
ATHENA.MIT.EDU = {
kdc = kerberos.mit.edu:88
kdc = kerberos-1.mit.edu:88
kdc = kerberos-2.mit.edu:88
admin_server = kerberos.mit.edu
default_domain = mit.edu
}
MEDIA-LAB.MIT.EDU = {
kdc = kerberos.media.mit.edu
admin_server = kerberos.media.mit.edu
}
ZONE.MIT.EDU = {
kdc = casio.mit.edu
kdc = seiko.mit.edu
admin_server = casio.mit.edu
}
MOOF.MIT.EDU = {
kdc = three-headed-dogcow.mit.edu:88
kdc = three-headed-dogcow-1.mit.edu:88
admin_server = three-headed-dogcow.mit.edu
}
CSAIL.MIT.EDU = {
kdc = kerberos-1.csail.mit.edu
kdc = kerberos-2.csail.mit.edu
admin_server = kerberos.csail.mit.edu
default_domain = csail.mit.edu
krb524_server = krb524.csail.mit.edu
}
IHTFP.ORG = {
kdc = kerberos.ihtfp.org
admin_server = kerberos.ihtfp.org
}
GNU.ORG = {
kdc = kerberos.gnu.org
kdc = kerberos-2.gnu.org
kdc = kerberos-3.gnu.org
admin_server = kerberos.gnu.org
}
1TS.ORG = {
kdc = kerberos.1ts.org
admin_server = kerberos.1ts.org
}
GRATUITOUS.ORG = {
kdc = kerberos.gratuitous.org
admin_server = kerberos.gratuitous.org
}
DOOMCOM.ORG = {
kdc = kerberos.doomcom.org
admin_server = kerberos.doomcom.org
}
ANDREW.CMU.EDU = {
kdc = kerberos.andrew.cmu.edu
kdc = kerberos2.andrew.cmu.edu
kdc = kerberos3.andrew.cmu.edu
admin_server = kerberos.andrew.cmu.edu
default_domain = andrew.cmu.edu
}
CS.CMU.EDU = {
kdc = kerberos.cs.cmu.edu
kdc = kerberos-2.srv.cs.cmu.edu
admin_server = kerberos.cs.cmu.edu
}
DEMENTIA.ORG = {
kdc = kerberos.dementix.org
kdc = kerberos2.dementix.org
admin_server = kerberos.dementix.org
}
stanford.edu = {
kdc = krb5auth1.stanford.edu
kdc = krb5auth2.stanford.edu
kdc = krb5auth3.stanford.edu
master_kdc = krb5auth1.stanford.edu
admin_server = krb5-admin.stanford.edu
default_domain = stanford.edu
}
UTORONTO.CA = {
kdc = kerberos1.utoronto.ca
kdc = kerberos2.utoronto.ca
kdc = kerberos3.utoronto.ca
admin_server = kerberos1.utoronto.ca
default_domain = utoronto.ca
}
A.NET = {
admin_server = dc.a.net
kdc = dc.a.net
}
B.NET = {
admin_server = dc.b.net
kdc = dc.b.net
}
[domain_realm]
.mit.edu = ATHENA.MIT.EDU
mit.edu = ATHENA.MIT.EDU
.media.mit.edu = MEDIA-LAB.MIT.EDU
media.mit.edu = MEDIA-LAB.MIT.EDU
.csail.mit.edu = CSAIL.MIT.EDU
csail.mit.edu = CSAIL.MIT.EDU
.whoi.edu = ATHENA.MIT.EDU
whoi.edu = ATHENA.MIT.EDU
.stanford.edu = stanford.edu
.slac.stanford.edu = SLAC.STANFORD.EDU
.toronto.edu = UTORONTO.CA
.utoronto.ca = UTORONTO.CA
a.net = A.NET
.a.net = A.NET
b.net = B.NET
.b.net = .B.NET
[login]
krb4_convert = true
krb4_get_tickets = false
/etc/nsswitch.conf
passwd: compat winbind
group: compat winbind
shadow: compat
gshadow: files
hosts: files dns
networks: files
protocols: db files
services: db files
ethers: db files
rpc: db files
netgroup: nis
大多数修改都是基于这些说明，尽管我将域 b 添加到了 krb5.conf 中：https://docs.citrix.com/en-us/linux-virtual-delivery-agent/7-15-ltsr/installation-overview/ubuntu.html
我尝试过以下 wbinfo 命令：
wbinfo --在线状态显示域 A 在线，但域 B 离线。
wbinfo -n B\管理员返回 SID，wbinfo -s SID 返回名称
wbinfo-m 内置 MYLINUX A B
wbinfo -KB\用户%密码返回以下错误消息：
wbcLogonUser(B\user): error code was NT_STATUS_NO_LOGON_SERVERS (0xc000005e)
error message was: No logon servers are currently available to service the logon request.
Could not authenticate user [B\user%password] with Kerberos (ccache: FILE)
如果有人能帮助我解决这个问题，我将非常感激。我该如何开始解决这个问题？
答案1
只有 Samba 4.8.x+ 支持这种信任。
我知道您唯一需要做的就是在以下部分中配置idmap受信任的域：[global]smb.conf
idmap config <trusted_domain> : backend = rid
idmap config <trusted_domain> : range = ?????- ?????
确保该范围不与您当前为（本地）域定义的范围重叠。
答案2
您忘记在 中添加 Kerberos 主体smb.conf。如果没有此参数，具有单向信任的用户将无法登录。
对于跨 DC 的 Kerberos 5 主体，请使用
[global]
winbind use krb5 enterprise principals = Yes
完整步骤在我的博客文章就此主题而言。