[Samba] How to stop mount.cifs remembering password

[Andy Gibbs]

Dear all,

I'm fairly new to Samba and CIFS and, for that matter, Linux in general.
I'm having a problem with "mount.cifs" as provided with Debian 5.  I'm
afraid I cannot say what version of mount.cifs I have since doing
"mount.cifs -V" does not (contrary to the message it shows when I do this)
actually show the version, but rather how to use the program.

The problem I have is that having successfully logged into a Windows shared
folder, I can subsequently log in *without* the correct password.

So...

mount.cifs \\192.168.1.0\folder /mnt -o user=joebloggs,pass=correct
umount /mnt
mount.cifs \\192.168.1.0\folder /mnt -o user=joebloggs,pass=incorrect

At this point it has remounted and given me full access, even though I've
got my password wrong the second time (and each subsequent time).  I can
even do "-o user=user,guest".  If I change user, then I must get the
password right at least once, but then once I have got it right, I then no
longer need to get it right.  The problem is that anyone using the computer
after someone has accessed the Windows share, can also then access it
without knowing the password.

As far as I can see, and I'm no expert, this is not a Windows problem since
in Windows, connecting to the folder requires the correct password every
time.

Is there any way I can force mount.cifs to forget the correct password so
that it requires it to be correct each time?

I'm sorry if I have not provided the correct information: I will happily do
so if told what to provide!  I have tried the Samba website and Google for
answers, but haven't found the right search phrase.  If I've missed
something, I'll happily just receive a link to the right page.

Thanks for any help!

Andy