[Samba] win 7 client can't map drive: getpeername failed

[Ed Strong]

Hi,

I'm re-posting this (with some more info) as I don't think the original got
through as I wasn't
signed up to the samba list.

this is my first foray in samba (and newsgroups) so go easy :)
I've started reading the o'reilly samba book but finding it hard going.

Anyway I'm trying to map a network drive from a windows 7 pro client to a
QNAP NAS with the command:
  net use s: \\qnap\share

I've posted on several forums and got good advice but the problem remains.
Rather than repost all the detail, please see my original posts:

http://forum.qnap.com/viewtopic.php?f=185&t=74639
http://social.technet.microsoft.com/Forums/en-US/winservergen/thread/11d35b0c-ac95-489f-b5d1-0486b9774603
http://www.edugeek.net/forums/windows-7/112309-map-network-drive-nas-but-get-error-64-58-a.html

I've managed to ssh onto the QNAP via putty and found this in the logs
(getpeername failed)

[/var/log] # pwd
/var/log
[/var/log] # tail -f log.smbd
[2013/05/01 09:36:17.135999,  0] lib/util_sock.c:474(read_fd_
with_timeout)
[2013/05/01 09:36:17.136096,  0]
lib/util_sock.c:1440(get_peer_addr_internal)
  getpeername failed. Error was Transport endpoint is not connected
  read_fd_with_timeout: client 0.0.0.0 read error = Connection reset by
peer.
[2013/05/01 09:36:17.137700,  1] smbd/server.c:299(remove_child_pid)
  Scheduled cleanup of brl and lock database after unclean shutdown
[2013/05/01 09:36:17.178522,  1] smbd/service.c:1073(make_connection_snum)
  172.24.120.139 (172.24.120.139) connect to service Staff initially as
user DOMAIN+admin (uid=10001423, gid=10000514) (pid

25771)
[2013/05/01 09:36:17.179093,  0] lib/util_sock.c:474(read_fd_with_timeout)
[2013/05/01 09:36:17.179173,  0]
lib/util_sock.c:1440(get_peer_addr_internal)
  getpeername failed. Error was Transport endpoint is not connected
  read_fd_with_timeout: client 0.0.0.0 read error = Connection reset by
peer.
[2013/05/01 09:36:17.179289,  1] smbd/service.c:1254(close_cnum)
  172.24.120.139 (172.24.120.139) closed connection to service Staff
[2013/05/01 09:36:37.142714,  1] smbd/server.c:272(cleanup_timeout_fn)
  Cleaning up brl and lock database after unclean shutdown


The QNAP's samba version appears to be 3.5.2:

[/var/log] # ps -ef | grep smb
 4016 admin      3104 S   /usr/local/samba/sbin/winbindd -s
/etc/config/smb.conf
 4017 admin      3728 S   /usr/local/samba/sbin/winbindd -s
/etc/config/smb.conf
 4366 admin      1840 S   /usr/local/samba/sbin/winbindd -s
/etc/config/smb.conf
 4877 admin      3300 S   /usr/local/samba/sbin/winbindd -s
/etc/config/smb.conf
 4902 admin      3952 S   /usr/local/samba/sbin/winbindd -s
/etc/config/smb.conf
 4978 admin      4132 S   /usr/local/samba/sbin/smbd -l /var/log -D -s
/etc/config/smb.conf
 4979 admin      3356 S   /usr/local/samba/sbin/winbindd -s
/etc/config/smb.conf
 4980 admin      1224 S   /usr/local/samba/sbin/winbindd -s
/etc/config/smb.conf
 4995 admin      1016 S   /usr/local/samba/sbin/smbd -l /var/log -D -s
/etc/config/smb.conf
 5063 admin      2068 S   /usr/local/samba/sbin/winbindd -s
/etc/config/smb.conf
 9509 admin      1664 S   /usr/local/samba/sbin/nmbd -l /var/log -D -s
/etc/config/smb.conf
25540 admin       544 S   grep smb
[/var/log] # /usr/local/samba/sbin/smbd -V
Version 3.5.2


I've also installed MS network monitor on two clients and did a capture
whilst running the command
   net use s:\ \\saturn\staff

I've posted three screenshots here:

https://plus.google.com/photos/108734482620454690509/albums/5875135861918839393?authkey=CJ3lwKu2xJqMyQE

Basically, Worked.png shows the SMB frames on a PC where the net use
command worked
and Failed.png shows the SMB frames on a PC where the net use command did
not work

It looks to me like the first 6 SMB frames are identical. Then things start
to change

On the working client we continue with frame 10113 which is a
  Dfsc: Get DFS Referral Request

but the failing client continues with some TCP frames (see
tcp-frames154-157.png) 154 to 157
before it seems to start the negotiation again at frame 158

Not sure how to troubleshoot this further so any advice welcome.

Thanks
Ed

PS I initially tried to post this on google group linux.samba but was
rejected by the
moderation robot which said "Please submit your message to the mailing list
address".
I did this with attached png's but failed due to file size so hopefully 3rd
time lucky!