Re: Height of paranoia

Hi Wali

As a fist measurement, i would separate the executive managers network, move the stations to another/new network segment. There you can also enable a different set of ACL rules.

As a 2nd measurement i would use point-to-point encryption, high confidential emails should be encryptet however so that would be a good time to apply it.
There are a lot of tools, but you can pick one which is costs-effective and easy to implement in outlook.


regards

Adam Pal


-------- Original-Nachricht --------
Datum: Wed, 27 Aug 2008 19:55:14 +0400
Von: "WALI" <hkhasgiwale@xxxxxxxxx>
An: security-basics@xxxxxxxxxxxxxxxxx
Betreff: Height of paranoia

It's a given that all workstations have XP firewall enabled, an enterprise
grade antivirus and Windows defender installed. I am the security guy.

The need is that there are a couple top management executives that have
highly confidential data/emails residing on their desktops, and quite a
few
times, the information seems to have leaked out.

Discounting the 'word of mouth' of their secretaries or the end recipients
of that information, I want to take as many precautions from the IT
security
perspective as possible and even bring our domain admins and helpdesk
personnel into the realm of doubt.

We have a Windows 20003/exchange 2003 environment of about a 2000 users.
Here's what I have thought:

1. If I detach these executive PCs from the domain. Mails will stop
landing
in MS Outlook. Is there a way around? Also DNS security doesn't register
any
PC unless it's joined to a domain. I thought of this to make it out of
bounds by system/domain admins. I have a feeling that their port 3389 gets
accessed when they aren't around.

2. Alternatively, create a private vlan on the core switch and make these
PCs as it's members. Put an ACL and deny everything except ports required
to
authenticate to AD and exchange and few other web applications. Monitor
port
memberships regularly.

3. How to secure their emails from exchange admins (it's the height, I
know).

Pls advise!!

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