[Dovecot] ntlm_auth in Dovecot

[Leonardo]

Hi,

I'm trying getting NTLM auth working against AD in my Dovecot 2.0.15.

I'm getting the following error:


Jun 08 14:18:11 auth: Info: winbind(?,10.44.3.151): user not
authenticated: NT_STATUS_UNSUCCESSFUL


"wbinfo -u" reports all the users of the domain and "ntlm_auth
--username=%name% --domain="%domain%" gets authenticated successfully.


Debugging winbind I can see the following error:


[2012/06/08 14:18:11.129611, 10]
winbindd/winbindd.c:651(process_request)
  process_request: unknown request fn number 14
[2012/06/08 14:18:11.129671, 10]
winbindd/winbindd.c:738(winbind_client_response_written)
  winbind_client_response_written[2822:unknown request]: delivered
response to client


My dovecot.conf is the following:



auth_mechanisms = plain ntlm login
auth_username_format = %n
auth_verbose = yes
auth_winbind_helper_path = /usr/bin/ntlm_auth
auth_use_winbind = yes
auth_debug = yes
disable_plaintext_auth = no
info_log_path = /var/log/dovecot-info.log
log_path = /var/log/dovecot.log
mail_location = maildir:/var/mail/domains/%d/%n

plugin {
  autocreate = Trash
  autocreate2 = Spam
  autocreate3 = Sent
  autosubscribe = Trash
  autosubscribe2 = Spam
  autosubscribe3 = Sent
}

protocols = imap

ssl = no

userdb {
  driver = static
  args = uid=100 gid=101 home=/var/mail/domains/%d/%n
first_valid_uid=100
}

passdb ldap {
  driver = ldap
  args = /etc/dovecot/dovecot-ldap.conf
}

protocol imap {
  mail_plugins = autocreate
}


Sounds like there is an issue when Dovecot runs "ntlm_auth". It doesn't
appear to be a permission issue (perms are 755).

Any help is appreciated. Thank you in advance.

-- leonardo.