Security Basics mailing list archives
Re: Height of paranoia
From: Chad Perrin <perrin () apotheon com>
Date: Thu, 28 Aug 2008 16:00:03 -0600
On Wed, Aug 27, 2008 at 07:55:14PM +0400, WALI wrote:
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).
Have you considered setting them up to use file and email encryption? Are you positive these workstations are not infected somehow? I don't know all the details of your circumstances, but I'd want to set up integrity auditing and file/email encryption to protect sensitive data on such systems. Without a good integrity auditing system (maintained on a separate system where it won't be compromised if the audited system is compromised, naturally), you just cannot be 100% certain the system isn't compromised. -- Chad Perrin Larry Wall: "You can never entirely stop being what you once were. That's why it's important to be the right person today, and not put it off till tomorrow."
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Current thread:
- Re: SIM questions., (continued)
- Re: SIM questions. Adriel Desautels (Aug 20)
- RE: SIM questions. Andy Cuff (Talisker) (Aug 20)
- Height of paranoia WALI (Aug 27)
- Re: Height of paranoia Adriel Desautels (Aug 28)
- RE: Height of paranoia Murda Mcloud (Aug 28)
- Re: Height of paranoia Adam Pal (Aug 28)
- RE: Height of paranoia Scott Race (Aug 28)
- RE: Height of paranoia Rivest, Philippe (Aug 28)
- Re: Height of paranoia pinowudi (Aug 28)
- Message not available
- Re:Height of paranoia reflect ocean (Aug 28)
- Height of paranoia WALI (Aug 27)
- Re: Height of paranoia Chad Perrin (Aug 28)
- Re: Height of paranoia David J. Bianco (Aug 28)