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RE: Deny access to copy files
From: "Yahsodhan Deshpande" <yahsodhan.deshpande () nevisnetworks com>
Date: Mon, 2 Jun 2008 16:54:32 -0700

I think we are missing the point here; the idea of VM was to create a
sand box for the developer. He will keep using his own environment;
browse the internet using his/her pc/laptop, but all the development
work will have to be done under the VM.

The VM is in control of the admin, and will have much better chance of
having the control within that environment, rather than restricting the
user from his normal activities.

I am not suggesting using VM as a security device, rather just limiting
the management overhead to each individual pc/laptop to a centrally
managed VM, with least effect on the end user in his normal activities.

As I already mentioned hardening the VM is a task in itself, but once
achieved is much more maintainable.


-----Original Message-----
From: Craig Wright [mailto:Craig.Wright () bdo com au] 
Sent: Monday, June 02, 2008 4:21 PM
To: Yahsodhan Deshpande; Adam Pal; Ahmed Khalid
Cc: focus-ms () securityfocus com; security-basics () lists securityfocus com
Subject: RE: Deny access to copy files

So add an extra layer of risk? With no gain? Why?

VMs are not a security device (as much as people like to believe this).
The locking down of the VM is the same process as locking down the host,
but now you also have a hypervisor layer to be concerned over.

Dr Craig Wright GSE LLM

Craig Wright
Manager, Risk Advisory Services

Direct : +61 2 9286 5497
Craig.Wright () bdo com au
+61 417 683 914

BDO Kendalls (NSW-VIC) Pty. Ltd.
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-----Original Message-----

From: listbounce () securityfocus com [mailto:listbounce () securityfocus com]
On Behalf Of Yahsodhan Deshpande
Sent: Tuesday, 3 June 2008 7:29 AM
To: Adam Pal; Ahmed Khalid
Cc: focus-ms () securityfocus com; security-basics () lists securityfocus com
Subject: RE: Deny access to copy files

Hi Ahmed,
   How about creating a virtual machine (which is hardened enough), and
then allow the access to the code only via the virtual machine.

   Hardening the VM would be a task in itself, but it would solve much
of the issues related to USB and mass storage devices.


-----Original Message-----
From: listbounce () securityfocus com [mailto:listbounce () securityfocus com]
On Behalf Of Adam Pal
Sent: Monday, June 02, 2008 1:15 PM
To: Ahmed Khalid
Cc: focus-ms () securityfocus com; security-basics () lists securityfocus com
Subject: Re: Deny access to copy files

Hello Ahmed,

Sounds more like you try washing your hands without getting wet :)
I can hardly imagine, that the programmers should be able to read but
not to copy, so if they need to programm they need access to the code.
I think its more frustrating for programmers to know that they have to
work with "handcuffs".
I think the problem lies much deeper :
do you trust your programmers?
If not, hire another, if yes, no such measurements needed, or better
say not more than written agreements about security policy.
About blocking web access:
As i can remember that one of the core problems of security is that
you cannot protect your data efficiently from attackers within the
I can remember about agreements which contain things like:
-not connecting mobile storage devices to the workstation (this can be
-not connecting mobile devices to the internal network (this can also
be monitored)
-not taking parts of code out of the company (which can also be

Of course, bad-intentioned people will be able to bypass such
agreements but i preffer to assume that in your staff are good people
One more - what about using interfaces for programming? Doing so,
every one holds only a small, unusable piece of the "puzzle".

Best regards,
 Adam Pal

Sunday, June 1, 2008, 8:20:25 PM, you wrote:

<==============Original message text===============
AK> I am working for a software house, they are developing a software
AK> and their requirement is to restrict programmers to take the code
out of
AK> office premises due to company policy. I am trying to configure a
AK> based machine which denies access to copy files to external storage
AK> connected to USB. There is an NTFS permission "Read + Execute" I
guess this
AK> could do the work but is there any other way to do it?

AK> They also don't need programmers to take the code with them in their
AK> I can restrict SMTP and POP ports but when it comes to web based
emails I am
AK> clueless,  How can I restrict web based emails like hotmail, gmail,
AK> there are so many of these and if I somehow manage to block all web
AK> email sites someone can write a script to send emails, if not a
script HTTP
AK> tunneling would bypass any checks and bounds defined by my
AK> machine. How can I block such thing?

AK> Any help would be highly appreciated.

AK> Regards,
AK> Ahmed Khalid

<===========End of original message text===========

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