我已安装 Samba4 来作为备份域控制器：
james@photon:~$ testparm
Load smb config files from /etc/samba/smb.conf
rlimit_max: increasing rlimit_max (1024) to minimum Windows limit (16384)
Processing section "[homes]"
Processing section "[netlogon]"
Processing section "[profiles]"
Processing section "[printers]"
Processing section "[print$]"
Loaded services file OK.
Server role: ROLE_DOMAIN_BDC
Press enter to see a dump of your service definitions
[global]
workgroup = NT4Domain
server string = %h NT4 BDC (Samba4, Linux)
interfaces = lo, eth1
bind interfaces only = Yes
server role = classic backup domain controller
map to guest = Bad User
obey pam restrictions = Yes
passdb backend = ldapsam:ldap://127.0.0.1/
pam password change = Yes
passwd program = /usr/bin/passwd %u
passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
syslog = 0
log file = /var/log/samba/log.%m
max log size = 1000
name resolve order = wins, bcast, hosts
client signing = if_required
server signing = if_required
add user script = /usr/sbin/smbldap-useradd -m '%u' -t 1
add group script = /usr/sbin/smbldap-groupadd -p '%g'
add user to group script = /usr/sbin/smbldap-groupmod -m '%u' '%g'
set primary group script = /usr/sbin/smbldap-usermod -g '%g' '%u'
add machine script = /usr/sbin/smbldap-useradd -w '%u' -t 1
logon script = scripts\logon.cmd
logon path = \\%L\profiles\%U
logon drive = H:
logon home = \\%L\%U
domain logons = Yes
domain master = No
dns proxy = No
wins server = ip.of.nt4.box
ldap admin dn = cn=admin,dc=thisdomain
ldap group suffix = ou=Groups
ldap idmap suffix = ou=Idmap
ldap machine suffix = ou=People
ldap passwd sync = yes
ldap suffix = dc=thisdomain
ldap ssl = no
ldap timeout = 20
ldap user suffix = ou=People
usershare allow guests = Yes
panic action = /usr/share/samba/panic-action %d
winbind cache time = 3600
winbind enum users = Yes
winbind enum groups = Yes
winbind use default domain = Yes
winbind offline logon = Yes
idmap config * : backend = tdb
ea support = Yes
map acl inherit = Yes
[homes]
comment = Home Directories
valid users = %S
read only = No
create mask = 0775
directory mask = 0775
browseable = No
[netlogon]
comment = Network Logon Service
path = /home/samba/netlogon
guest ok = Yes
[profiles]
comment = Users profiles
path = /home/samba/profiles
create mask = 0600
directory mask = 0700
browseable = No
[printers]
comment = All Printers
path = /var/spool/samba
create mask = 0700
printable = Yes
print ok = Yes
browseable = No
[print$]
comment = Printer Drivers
path = /var/lib/samba/printers
write list = root, @lpadmin
它已加入我的 NT4 域。共享打印机可访问，netlogon 共享可见，用户共享可见，并可由域中 Windows 计算机的正确（本地设置）用户浏览。计算机帐户在 NT4 域控制器中可见。它正常工作。
但是，我无法让 net rpc vampire 工作。NT4 域控制器上存储了数百个用户帐户，我需要将它们同步到 Samba 机器上的（工作）LDAP 实例，以便我们可以停用 NT4 机器。
james@photon:~$ sudo net rpc join -U NT4AdminAccount%secret
Joined domain NT4Domain.
然而：
sudo net rpc vampire -U NT4AdminAccount%secret
DC is not running Active Directory
cli_rpc_pipe_open_schannel: failed to get schannel session key from server 127.0.0.1 for domain NT4Domain.
Could not initialise schannel netlogon pipe. Error was NT_STATUS_ACCESS_DENIED
和：
sudo net rpc vampire -S NT4DC -U NT4AdminAccount%secret
DC is not running Active Directory
cli_rpc_pipe_open_schannel: failed to get schannel session key from server data1 for domain ATMOS.
Could not initialise schannel netlogon pipe. Error was NT_STATUS_INVALID_COMPUTER_NAME
当我尝试使用 -d=10 运行 vampire 时看到的相关行是：
result : NT_STATUS_INVALID_COMPUTER_NAME
get_schannel_session_key_common: rpccli_netlogon_setup_creds failed with result NT_STATUS_INVALID_COMPUTER_NAME to server NT4DC, domain NT4Domain, machine account SAMBASERVER.
cli_rpc_pipe_open_schannel: failed to get schannel session key from server data1 for domain ATMOS.
Could not initialise schannel netlogon pipe. Error was NT_STATUS_INVALID_COMPUTER_NAME
return code = -1
Freeing parametrics:
那么，经历了这一切之后，到底出了什么问题？vampire 现在坏了吗？我一直读到它已被弃用，但我看到的所有使用 samba-tool domain join 执行此操作的文档都是关于加入活动目录域的。这不是我们想要做的。我还在 schannel 会话密钥错误的上下文中阅读了很多关于 Kerberos 的内容，但这也是活动目录的事情，不是吗？我认为 NT4 使用 LANMAN 来实现现在由 Kerberos 覆盖的那些功能。似乎只有 vampire 操作让我感到困难。其他一切似乎都运行良好……
提前致谢。