Cygdrive mounts

Cygdrive mounts

[Chris Ellsworth]

Is there a way to disable the mounting of the drives either via a
cygwin command or modifying the registry?

cke


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Re: Cygdrive mounts

[Larry Hall (RFK Partners, Inc)]

At 12:52 PM 4/23/2002, Chris Ellsworth wrote:
>Is there a way to disable the mounting of the drives either via a
>cygwin command or modifying the registry?


The command would be 'umount'.  Why do you want to do this?


Larry Hall                              lhall@rfk.com
RFK Partners, Inc.                      http://www.rfk.com
838 Washington Street                   (508) 893-9779 - RFK Office
Holliston, MA 01746                     (508) 893-9889 - FAX


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Re: Cygdrive mounts

[Chris Ellsworth]

I am doing install of this for sshd on windows for clients for the
purpose of forwarding ports for access such as VNC, pcanywhere FTP and
other items and i dont want to give access to the other areas of the
drives. I tryed the umount command and have not sucessfully removed
it. maybe i am doing something but here is what i have done.

[admin@2k-iis-ikon]~:{103}:$ mount
c:\cygwin\bin on /usr/bin type system (binmode)
c:\cygwin\lib on /usr/lib type system (binmode)
c:\cygwin on / type system (binmode)
c: on /cygdrive/c type user (textmode,noumount)
f: on /cygdrive/f type user (textmode,noumount)
[admin@2k-iis-ikon]~:{104}:$ umount -U
[admin@2k-iis-ikon]~:{105}:$ mount
c:\cygwin\bin on /usr/bin type system (binmode)
c:\cygwin\lib on /usr/lib type system (binmode)
c:\cygwin on / type system (binmode)
c: on /cygdrive/c type user (textmode,noumount)
f: on /cygdrive/f type user (textmode,noumount)
[admin@2k-iis-ikon]~:{106}:$

----- Original Message -----
From: "Larry Hall (RFK Partners, Inc)" <lhall@rfk.com>
To: "Chris Ellsworth" <cke@highlandshighspeed.net>;
<cygwin@cygwin.com>
Sent: Tuesday, April 23, 2002 9:56 AM
Subject: Re: Cygdrive mounts


> At 12:52 PM 4/23/2002, Chris Ellsworth wrote:
> >Is there a way to disable the mounting of the drives either via a
> >cygwin command or modifying the registry?
>
>
> The command would be 'umount'.  Why do you want to do this?
>
>
> Larry Hall                              lhall@rfk.com
> RFK Partners, Inc.                      http://www.rfk.com
> 838 Washington Street                   (508) 893-9779 - RFK Office
> Holliston, MA 01746                     (508) 893-9889 - FAX
>
>
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Re: Cygdrive mounts

[Chris Ellsworth]

I understand that through cygwin it goes around windows items but i
want to remove the cygdrive mounts
because the customers dont want to give access to ie /cygdrive/c or
/cygdrive/<drive> to the people that login via ssh.

----- Original Message -----
From: "Roberto J Dohnert" <webwarrior@mac.com>
To: "Chris Ellsworth" <cke@highlandshighspeed.net>
Sent: Tuesday, April 23, 2002 11:09 AM
Subject: Re: Cygdrive mounts


> Just make sure that your drives are not uses as Shared folders by
doing
> it thru cygwin you are going around your elbow to get to your
asshole.
> excuse the pun.  That would be the easiest way that i know how to do
it.
>
> On Tue, 2002-04-23 at 13:45, Chris Ellsworth wrote:
> > I am doing install of this for sshd on windows for clients for the
> > purpose of forwarding ports for access such as VNC, pcanywhere FTP
and
> > other items and i dont want to give access to the other areas of
the
> > drives. I tryed the umount command and have not sucessfully
removed
> > it. maybe i am doing something but here is what i have done.
> >
> > [admin@2k-iis-ikon]~:{103}:$ mount
> > c:\cygwin\bin on /usr/bin type system (binmode)
> > c:\cygwin\lib on /usr/lib type system (binmode)
> > c:\cygwin on / type system (binmode)
> > c: on /cygdrive/c type user (textmode,noumount)
> > f: on /cygdrive/f type user (textmode,noumount)
> > [admin@2k-iis-ikon]~:{104}:$ umount -U
> > [admin@2k-iis-ikon]~:{105}:$ mount
> > c:\cygwin\bin on /usr/bin type system (binmode)
> > c:\cygwin\lib on /usr/lib type system (binmode)
> > c:\cygwin on / type system (binmode)
> > c: on /cygdrive/c type user (textmode,noumount)
> > f: on /cygdrive/f type user (textmode,noumount)
> > [admin@2k-iis-ikon]~:{106}:$
> >
> > ----- Original Message -----
> > From: "Larry Hall (RFK Partners, Inc)" <lhall@rfk.com>
> > To: "Chris Ellsworth" <cke@highlandshighspeed.net>;
> > <cygwin@cygwin.com>
> > Sent: Tuesday, April 23, 2002 9:56 AM
> > Subject: Re: Cygdrive mounts
> >
> >
> > > At 12:52 PM 4/23/2002, Chris Ellsworth wrote:
> > > >Is there a way to disable the mounting of the drives either via
a
> > > >cygwin command or modifying the registry?
> > >
> > >
> > > The command would be 'umount'.  Why do you want to do this?
> > >
> > >
> > > Larry Hall                              lhall@rfk.com
> > > RFK Partners, Inc.                      http://www.rfk.com
> > > 838 Washington Street                   (508) 893-9779 - RFK
Office
> > > Holliston, MA 01746                     (508) 893-9889 - FAX
> > >
> > >
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> > >
> >
> >
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> >
>
>
>


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Re: Cygdrive mounts

[Larry Hall (RFK Partners, Inc)]

OK, I see what you're doing.  I thought this might be what you were driving
at.  You're trying to use the wrong tools to limit access.  Even if you 
could unmount the drives in question, there's nothing to stop the user 
from remounting them as they like.  You need to use file access permissions,
either through Windows or Cygwin (with ntsec set) to make this work as you 
want.


Larry Hall                              lhall@rfk.com
RFK Partners, Inc.                      http://www.rfk.com
838 Washington Street                   (508) 893-9779 - RFK Office
Holliston, MA 01746                     (508) 893-9889 - FAX




At 01:45 PM 4/23/2002, Chris Ellsworth wrote:
>I am doing install of this for sshd on windows for clients for the
>purpose of forwarding ports for access such as VNC, pcanywhere FTP and
>other items and i dont want to give access to the other areas of the
>drives. I tryed the umount command and have not sucessfully removed
>it. maybe i am doing something but here is what i have done.
>
>[admin@2k-iis-ikon]~:{103}:$ mount
>c:\cygwin\bin on /usr/bin type system (binmode)
>c:\cygwin\lib on /usr/lib type system (binmode)
>c:\cygwin on / type system (binmode)
>c: on /cygdrive/c type user (textmode,noumount)
>f: on /cygdrive/f type user (textmode,noumount)
>[admin@2k-iis-ikon]~:{104}:$ umount -U
>[admin@2k-iis-ikon]~:{105}:$ mount
>c:\cygwin\bin on /usr/bin type system (binmode)
>c:\cygwin\lib on /usr/lib type system (binmode)
>c:\cygwin on / type system (binmode)
>c: on /cygdrive/c type user (textmode,noumount)
>f: on /cygdrive/f type user (textmode,noumount)
>[admin@2k-iis-ikon]~:{106}:$
>
>----- Original Message -----
>From: "Larry Hall (RFK Partners, Inc)" <lhall@rfk.com>
>To: "Chris Ellsworth" <cke@highlandshighspeed.net>;
><cygwin@cygwin.com>
>Sent: Tuesday, April 23, 2002 9:56 AM
>Subject: Re: Cygdrive mounts
>
>
> > At 12:52 PM 4/23/2002, Chris Ellsworth wrote:
> > >Is there a way to disable the mounting of the drives either via a
> > >cygwin command or modifying the registry?
> >
> >
> > The command would be 'umount'.  Why do you want to do this?
> >
> >
> > Larry Hall                              lhall@rfk.com
> > RFK Partners, Inc.                      http://www.rfk.com
> > 838 Washington Street                   (508) 893-9779 - RFK Office
> > Holliston, MA 01746                     (508) 893-9889 - FAX
> >
> >
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> > Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
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> >
> >
>
>
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Re: Cygdrive mounts

[Michael A Chase]

On Tue, 23 Apr 2002 10:45:52 -0700 Chris Ellsworth <cke@highlandshighspeed.net> wrote:

> I am doing install of this for sshd on windows for clients for the
> purpose of forwarding ports for access such as VNC, pcanywhere FTP and
> other items and i dont want to give access to the other areas of the
> drives. I tryed the umount command and have not sucessfully removed
> it. maybe i am doing something but here is what i have done.
> 
> [admin@2k-iis-ikon]~:{103}:$ mount
> c:\cygwin\bin on /usr/bin type system (binmode)
> c:\cygwin\lib on /usr/lib type system (binmode)
> c:\cygwin on / type system (binmode)
> c: on /cygdrive/c type user (textmode,noumount)
> f: on /cygdrive/f type user (textmode,noumount)
> [admin@2k-iis-ikon]~:{104}:$ umount -U
> [admin@2k-iis-ikon]~:{105}:$ mount
> c:\cygwin\bin on /usr/bin type system (binmode)
> c:\cygwin\lib on /usr/lib type system (binmode)
> c:\cygwin on / type system (binmode)
> c: on /cygdrive/c type user (textmode,noumount)
> f: on /cygdrive/f type user (textmode,noumount)
> [admin@2k-iis-ikon]~:{106}:$

You are likely doomed to disappointment.  Even if you disable /cygdrive/c,
c:/xxx will probably still work.  Perhaps sshd will allow you to specify a
local root.  You can link or mount whatever you want to allow access to
from inside there.

I tried "umount -U -c" and "umount -c", but neither worked for me, probably
a local system problem.  I was able to delete the information in the
registry (HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2),
but I don't know what other side effects might result so I'm putting it
back right away.

-- 
Mac :})
** I normally forward private questions to the appropriate mail list. **
Ask Smarter: http://www.tuxedo.org/~esr/faqs/smart-questions.htm
Give a hobbit a fish and he eats fish for a day.
Give a hobbit a ring and he eats fish for an age.



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Re: Cygdrive mounts

[Chris Ellsworth]

oh well
i think what im going to do is put all the users that connect into a
group then give that group deny rights to C:\ and other drives
that would probly do it for me.

----- Original Message -----
From: "Michael A Chase" <mchase@ix.netcom.com>
To: "Chris Ellsworth" <cke@highlandshighspeed.net>;
<cygwin@cygwin.com>
Sent: Tuesday, April 23, 2002 12:27 PM
Subject: Re: Cygdrive mounts


> On Tue, 23 Apr 2002 10:45:52 -0700 Chris Ellsworth
<cke@highlandshighspeed.net> wrote:
>
> > I am doing install of this for sshd on windows for clients for the
> > purpose of forwarding ports for access such as VNC, pcanywhere FTP
and
> > other items and i dont want to give access to the other areas of
the
> > drives. I tryed the umount command and have not sucessfully
removed
> > it. maybe i am doing something but here is what i have done.
> >
> > [admin@2k-iis-ikon]~:{103}:$ mount
> > c:\cygwin\bin on /usr/bin type system (binmode)
> > c:\cygwin\lib on /usr/lib type system (binmode)
> > c:\cygwin on / type system (binmode)
> > c: on /cygdrive/c type user (textmode,noumount)
> > f: on /cygdrive/f type user (textmode,noumount)
> > [admin@2k-iis-ikon]~:{104}:$ umount -U
> > [admin@2k-iis-ikon]~:{105}:$ mount
> > c:\cygwin\bin on /usr/bin type system (binmode)
> > c:\cygwin\lib on /usr/lib type system (binmode)
> > c:\cygwin on / type system (binmode)
> > c: on /cygdrive/c type user (textmode,noumount)
> > f: on /cygdrive/f type user (textmode,noumount)
> > [admin@2k-iis-ikon]~:{106}:$
>
> You are likely doomed to disappointment.  Even if you disable
/cygdrive/c,
> c:/xxx will probably still work.  Perhaps sshd will allow you to
specify a
> local root.  You can link or mount whatever you want to allow access
to
> from inside there.
>
> I tried "umount -U -c" and "umount -c", but neither worked for me,
probably
> a local system problem.  I was able to delete the information in the
> registry (HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts
v2),
> but I don't know what other side effects might result so I'm putting
it
> back right away.
>
> --
> Mac :})
> ** I normally forward private questions to the appropriate mail
list. **
> Ask Smarter: http://www.tuxedo.org/~esr/faqs/smart-questions.htm
> Give a hobbit a fish and he eats fish for a day.
> Give a hobbit a ring and he eats fish for an age.
>
>
>


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Re: Cygdrive mounts

[Larry Hall (RFK Partners, Inc)]

At 03:27 PM 4/23/2002, Michael A Chase wrote:
>On Tue, 23 Apr 2002 10:45:52 -0700 Chris Ellsworth <cke@highlandshighspeed.net> wrote:
>
> > I am doing install of this for sshd on windows for clients for the
> > purpose of forwarding ports for access such as VNC, pcanywhere FTP and
> > other items and i dont want to give access to the other areas of the
> > drives. I tryed the umount command and have not sucessfully removed
> > it. maybe i am doing something but here is what i have done.
> > 
> > [admin@2k-iis-ikon]~:{103}:$ mount
> > c:\cygwin\bin on /usr/bin type system (binmode)
> > c:\cygwin\lib on /usr/lib type system (binmode)
> > c:\cygwin on / type system (binmode)
> > c: on /cygdrive/c type user (textmode,noumount)
> > f: on /cygdrive/f type user (textmode,noumount)
> > [admin@2k-iis-ikon]~:{104}:$ umount -U
> > [admin@2k-iis-ikon]~:{105}:$ mount
> > c:\cygwin\bin on /usr/bin type system (binmode)
> > c:\cygwin\lib on /usr/lib type system (binmode)
> > c:\cygwin on / type system (binmode)
> > c: on /cygdrive/c type user (textmode,noumount)
> > f: on /cygdrive/f type user (textmode,noumount)
> > [admin@2k-iis-ikon]~:{106}:$
>
>You are likely doomed to disappointment.  Even if you disable /cygdrive/c,
>c:/xxx will probably still work.  Perhaps sshd will allow you to specify a
>local root.  You can link or mount whatever you want to allow access to
>from inside there.
>
>I tried "umount -U -c" and "umount -c", but neither worked for me, probably
>a local system problem.  I was able to delete the information in the
>registry (HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2),
>but I don't know what other side effects might result so I'm putting it
>back right away.


Right.  Using 'mount'/'umount' as security enforcing mechanisms is the 
wrong approach.  Use 'chown', 'chgrp', and 'chmod' with 'ntsec' set in 
your CYGWIN environment variable if you want to try to do this with Cygwin.
This approach also ends up being easy to compromise too though. Anyone
doing this is left with needing to set the proper permissions using Windows 
mechanisms, I'm afraid.


Larry Hall                              lhall@rfk.com
RFK Partners, Inc.                      http://www.rfk.com
838 Washington Street                   (508) 893-9779 - RFK Office
Holliston, MA 01746                     (508) 893-9889 - FAX


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Re: Cygdrive mounts

[Larry Hall (RFK Partners, Inc)]

Yep.

Larry Hall                              lhall@rfk.com
RFK Partners, Inc.                      http://www.rfk.com
838 Washington Street                   (508) 893-9779 - RFK Office
Holliston, MA 01746                     (508) 893-9889 - FAX



At 03:30 PM 4/23/2002, Chris Ellsworth wrote:
>oh well
>i think what im going to do is put all the users that connect into a
>group then give that group deny rights to C:\ and other drives
>that would probly do it for me.
>
>----- Original Message -----
>From: "Michael A Chase" <mchase@ix.netcom.com>
>To: "Chris Ellsworth" <cke@highlandshighspeed.net>;
><cygwin@cygwin.com>
>Sent: Tuesday, April 23, 2002 12:27 PM
>Subject: Re: Cygdrive mounts
>
>
> > On Tue, 23 Apr 2002 10:45:52 -0700 Chris Ellsworth
><cke@highlandshighspeed.net> wrote:
> >
> > > I am doing install of this for sshd on windows for clients for the
> > > purpose of forwarding ports for access such as VNC, pcanywhere FTP
>and
> > > other items and i dont want to give access to the other areas of
>the
> > > drives. I tryed the umount command and have not sucessfully
>removed
> > > it. maybe i am doing something but here is what i have done.
> > >
> > > [admin@2k-iis-ikon]~:{103}:$ mount
> > > c:\cygwin\bin on /usr/bin type system (binmode)
> > > c:\cygwin\lib on /usr/lib type system (binmode)
> > > c:\cygwin on / type system (binmode)
> > > c: on /cygdrive/c type user (textmode,noumount)
> > > f: on /cygdrive/f type user (textmode,noumount)
> > > [admin@2k-iis-ikon]~:{104}:$ umount -U
> > > [admin@2k-iis-ikon]~:{105}:$ mount
> > > c:\cygwin\bin on /usr/bin type system (binmode)
> > > c:\cygwin\lib on /usr/lib type system (binmode)
> > > c:\cygwin on / type system (binmode)
> > > c: on /cygdrive/c type user (textmode,noumount)
> > > f: on /cygdrive/f type user (textmode,noumount)
> > > [admin@2k-iis-ikon]~:{106}:$
> >
> > You are likely doomed to disappointment.  Even if you disable
>/cygdrive/c,
> > c:/xxx will probably still work.  Perhaps sshd will allow you to
>specify a
> > local root.  You can link or mount whatever you want to allow access
>to
> > from inside there.
> >
> > I tried "umount -U -c" and "umount -c", but neither worked for me,
>probably
> > a local system problem.  I was able to delete the information in the
> > registry (HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts
>v2),
> > but I don't know what other side effects might result so I'm putting
>it
> > back right away.
> >
> > --
> > Mac :})
> > ** I normally forward private questions to the appropriate mail
>list. **
> > Ask Smarter: http://www.tuxedo.org/~esr/faqs/smart-questions.htm
> > Give a hobbit a fish and he eats fish for a day.
> > Give a hobbit a ring and he eats fish for an age.
> >
> >
> >
>
>
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Re: Cygdrive mounts

[Christopher Faylor]

On Tue, Apr 23, 2002 at 12:27:45PM -0700, Michael A Chase wrote:
>On Tue, 23 Apr 2002 10:45:52 -0700 Chris Ellsworth <cke@highlandshighspeed.net> wrote:
>
>> I am doing install of this for sshd on windows for clients for the
>> purpose of forwarding ports for access such as VNC, pcanywhere FTP and
>> other items and i dont want to give access to the other areas of the
>> drives. I tryed the umount command and have not sucessfully removed
>> it. maybe i am doing something but here is what i have done.
>> 
>> [admin@2k-iis-ikon]~:{103}:$ mount
>> c:\cygwin\bin on /usr/bin type system (binmode)
>> c:\cygwin\lib on /usr/lib type system (binmode)
>> c:\cygwin on / type system (binmode)
>> c: on /cygdrive/c type user (textmode,noumount)
>> f: on /cygdrive/f type user (textmode,noumount)
>> [admin@2k-iis-ikon]~:{104}:$ umount -U
>> [admin@2k-iis-ikon]~:{105}:$ mount
>> c:\cygwin\bin on /usr/bin type system (binmode)
>> c:\cygwin\lib on /usr/lib type system (binmode)
>> c:\cygwin on / type system (binmode)
>> c: on /cygdrive/c type user (textmode,noumount)
>> f: on /cygdrive/f type user (textmode,noumount)
>> [admin@2k-iis-ikon]~:{106}:$
>
>You are likely doomed to disappointment.  Even if you disable /cygdrive/c,
>c:/xxx will probably still work.  Perhaps sshd will allow you to specify a
>local root.  You can link or mount whatever you want to allow access to
>from inside there.
>
>I tried "umount -U -c" and "umount -c", but neither worked for me, probably
>a local system problem.  I was able to delete the information in the
>registry (HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2),
>but I don't know what other side effects might result so I'm putting it
>back right away.

'umount -U -c' and 'umount -c' are the same thing.

If you want to remove something from the system mount table use the
options mentioned in 'umount -h' for manipulating the system mount
table.

However, cygwin defaults to /cygdrive, so even if you remove /cygdrive
settings from the registry, /cygdrive will still work.

It might be possible to mount /cygdrive to something like '/:::' or
something, obfuscating its use.

cgf

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Re: Cygdrive mounts

[Chris Ellsworth]

but if any unix user that know what im doing can doa mount and .. well
now the obscure is not so obscure any more
but do think the best option si to do ethe deny rights to the group
that comes in from ssh

----- Original Message -----
From: "Christopher Faylor" <cgf-cygwin@cygwin.com>
To: <cygwin@cygwin.com>
Sent: Tuesday, April 23, 2002 12:42 PM
Subject: Re: Cygdrive mounts


> On Tue, Apr 23, 2002 at 12:27:45PM -0700, Michael A Chase wrote:
> >On Tue, 23 Apr 2002 10:45:52 -0700 Chris Ellsworth
<cke@highlandshighspeed.net> wrote:
> >
> >> I am doing install of this for sshd on windows for clients for
the
> >> purpose of forwarding ports for access such as VNC, pcanywhere
FTP and
> >> other items and i dont want to give access to the other areas of
the
> >> drives. I tryed the umount command and have not sucessfully
removed
> >> it. maybe i am doing something but here is what i have done.
> >>
> >> [admin@2k-iis-ikon]~:{103}:$ mount
> >> c:\cygwin\bin on /usr/bin type system (binmode)
> >> c:\cygwin\lib on /usr/lib type system (binmode)
> >> c:\cygwin on / type system (binmode)
> >> c: on /cygdrive/c type user (textmode,noumount)
> >> f: on /cygdrive/f type user (textmode,noumount)
> >> [admin@2k-iis-ikon]~:{104}:$ umount -U
> >> [admin@2k-iis-ikon]~:{105}:$ mount
> >> c:\cygwin\bin on /usr/bin type system (binmode)
> >> c:\cygwin\lib on /usr/lib type system (binmode)
> >> c:\cygwin on / type system (binmode)
> >> c: on /cygdrive/c type user (textmode,noumount)
> >> f: on /cygdrive/f type user (textmode,noumount)
> >> [admin@2k-iis-ikon]~:{106}:$
> >
> >You are likely doomed to disappointment.  Even if you disable
/cygdrive/c,
> >c:/xxx will probably still work.  Perhaps sshd will allow you to
specify a
> >local root.  You can link or mount whatever you want to allow
access to
> >from inside there.
> >
> >I tried "umount -U -c" and "umount -c", but neither worked for me,
probably
> >a local system problem.  I was able to delete the information in
the
> >registry (HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus
Solutions\Cygwin\mounts v2),
> >but I don't know what other side effects might result so I'm
putting it
> >back right away.
>
> 'umount -U -c' and 'umount -c' are the same thing.
>
> If you want to remove something from the system mount table use the
> options mentioned in 'umount -h' for manipulating the system mount
> table.
>
> However, cygwin defaults to /cygdrive, so even if you remove
/cygdrive
> settings from the registry, /cygdrive will still work.
>
> It might be possible to mount /cygdrive to something like '/:::' or
> something, obfuscating its use.
>
> cgf
>
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