[Samba] FreeBSD: Changing UNIX password - Password Chat?

[Jon Theil Nielsen]

I can't get my Samba PDC (FreeBSD 7,0-BETA3) changing UNIX passwords
from Windows clients (Ctrl-Alt-Del).
I now have the password chat debug active and I have loglevel 100.
I am not certain about the syntax in the password chat. But if I from
a console try to change the password of a given user (here testuser1),
I see these lines:

mflserver3# /usr/bin/passwd testuser1
Changing local password for testuser1
New Password: (entering the password)
Retype New Password: (entering it again)

>From that i guess the expression in the chat would be:
*Changing*local*password*for* %u\n *New*Password* %n\n
*Retype*New*Password* %n\n

Selected parts of the log shows:

[2008/02/13 17:47:07, 100] smbd/chgpasswd.c:expect(279)
  expect: expected [*Changing*local*password*for*] received [Changing
local password for testuser1
  New Password:] match yes
[2008/02/13 17:47:07, 10] smbd/chgpasswd.c:expect(290)
  expect: returning True
[2008/02/13 17:47:07, 100] smbd/chgpasswd.c:expect(242)
  expect: sending [testuser1
  ]
[2008/02/13 17:47:07, 10] lib/util_sock.c:read_socket_with_timeout(476)
  read_socket_with_timeout: timeout read. select timed out.
[2008/02/13 17:47:07, 100] smbd/chgpasswd.c:expect(279)
  expect: expected [*New*Password*] received [
  Retype New Password:] match yes
[2008/02/13 17:47:07, 10] smbd/chgpasswd.c:expect(290)
  expect: returning True
[2008/02/13 17:47:07, 100] smbd/chgpasswd.c:expect(242)
  expect: sending [VerySecret
  ]
[2008/02/13 17:47:10, 10] lib/util_sock.c:read_socket_with_timeout(476)
  read_socket_with_timeout: timeout read. select timed out.
[2008/02/13 17:47:10, 100] smbd/chgpasswd.c:expect(279)
  expect: expected [*Retype*New*Password*] received [
  Mismatch; try again, EOF to quit.
  New Password:] match no
[2008/02/13 17:47:10, 2] smbd/chgpasswd.c:expect(285)
  expect: Unknown error: 0
[2008/02/13 17:47:10, 3] smbd/chgpasswd.c:talktochild(316)
  Response 3 incorrect
[2008/02/13 17:47:10, 3] smbd/chgpasswd.c:chat_with_program(372)
  chat_with_program: Child failed to change password: testuser1
[2008/02/13 17:47:10, 3] smbd/sec_ctx.c:pop_sec_ctx(415)
  pop_sec_ctx (1035, 1036) - sec_ctx_stack_ndx = 1
[2008/02/13 17:47:10, 5] rpc_parse/parse_samr.c:init_samr_r_chgpasswd_user(7576)
  init_samr_r_chgpasswd_user
[2008/02/13 17:47:10, 5] rpc_server/srv_samr_nt.c:_samr_chgpasswd_user(1581)
  _samr_chgpasswd_user: 1581
[2008/02/13 17:47:10, 5] rpc_parse/parse_prs.c:prs_debug(84)
  000000 samr_io_r_chgpasswd_user
[2008/02/13 17:47:10, 5] rpc_parse/parse_prs.c:prs_ntstatus(769)
      0000 status: NT_STATUS_ACCESS_DENIED

As told, I'm not confident with the syntax. Have I made it wrong? Or
can you see anything else from the log that can pinpoint the problem?
I would believe that there must be several admins out there who use
the combination of of Samba and FreeBSD without having these problems.

Cheers,
Jon Theil Nielsen