FreeBSD 11.0 and mounting SMB shared folder at boot without password

[David Christensen]

freebsd-questions:

I have a computer:

toor at freebsd:/root # freebsd-version
11.0-RELEASE-p7

toor at freebsd:/root # uname -a
FreeBSD freebsd 11.0-RELEASE-p1 FreeBSD 11.0-RELEASE-p1 #0 r306420: Thu 
Sep 29 03:40:55 UTC 2016 
root at releng2.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC  i386


I am attempting to mount a Microsoft Windows shared folder 
(//dc8ct591/data) into my home directory 
(freebsd:/usr/home/dpchrist/.data) at boot, without having to enter my 
password.


Using Xfce and Thunar, I can browse the network, see the shared folder, 
enter my credentials, and access files within the share.


After RTFM and STFW, this is my current attempt:

toor at freebsd:/root # ll /etc/fstab
-rw-r--r--  1 root  wheel  uarch 230 Jan 19 19:41 /etc/fstab

toor at freebsd:/root # grep dc8ct591 /etc/fstab
//dpchrist at dc8ct591/data /usr/home/dpchrist/.data smbfs rw,-N 0 0

toor at freebsd:/root # ll /etc/nsmb.conf
-rw-------  1 root  wheel  uarch 85 Jan 19 19:42 /etc/nsmb.conf

toor at freebsd:/root # cat /etc/nsmb.conf
[default]
workgroup=WORKGROUP
[dc8ct591:dpchrist]
password=<redacted>


If I run 'mount' with the -d option, I can see the system call to 
'mount_smbfs':

toor at freebsd:/root # mount -d /usr/home/dpchrist/.data
exec: mount_smbfs -o rw -N //dpchrist at dc8ct591/data /usr/home/dpchrist/.data


If I then run 'mount_smbfs' without the -N option and enter the password 
for dpchrist at dc8ct591, it works:

toor at freebsd:/root # mount_smbfs -o rw //dpchrist at dc8ct591/data 
/usr/home/dpchrist/.data
Password:

toor at freebsd:/root # mount | grep -i dc8ct591
//DPCHRIST at DC8CT591/DATA on /usr/home/dpchrist/.data (smbfs)


But if run 'mount', or 'mount_smbfs' manually with the -N option, it fails:

toor at freebsd:/root # umount /usr/home/dpchrist/.data

toor at freebsd:/root # mount | grep -i dc8ct591

toor at freebsd:/root # mount /usr/home/dpchrist/.data
mount_smbfs: unable to open connection: syserr = Authentication error

toor at freebsd:/root # mount_smbfs -o rw -N //dpchrist at dc8ct591/data 
/usr/home/dpchrist/.data
mount_smbfs: unable to open connection: syserr = Authentication error


I get the same result for shared folders on Samba 2:3.6.6-6+deb7u11 on 
Debian 7 (Wheezy) and on Windows XP SP2.


I don't know how to get more information about the "Authentication 
error" encountered by mount_smbfs (no --verbose or --debug option, and 
doesn't seem to write into any file in /var/log).


Any suggestions?


David