RE: Firewall and DMZ topology
From: Depp, Dennis M. (deppdm_at_ornl.gov)
Date: 06/10/03
- Previous message: Chris Berry: "Re: Firewall and DMZ topology"
- Maybe in reply to: William J. Burgos: "Firewall and DMZ topology"
- Next in thread: Steve Bremer: "RE: Firewall and DMZ topology"
- Reply: Steve Bremer: "RE: Firewall and DMZ topology"
- Reply: ed: "RE: Firewall and DMZ topology"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ]
Date: Tue, 10 Jun 2003 14:40:51 -0400 To: Chris Berry <compjma@hotmail.com>, security-basics@securityfocus.com
I'm not sure how a tri-homed firewall can be just as secure as a two
firewall setup. Consider this:
Hacker is able to penetrate your firewall and "owns" the box. In a
tri-homed firewall, they now have direct access to your internal
network. If this had been a two firewall setup, they would have to
compromise the second box as well. While this may not be an issue as
they were already sucessful in owning one firewall, hopefully you have
your intrusion detection system tuned to a greater degree of sensativity
in your DMZ. And you will be able to discover this second attempt.
I do think tri-homed firewalls are a good solution, but they are not as
secure as a two firewall solution.
Dennis Depp
>
> -----Original Message-----
> From: Chris Berry [mailto:compjma@hotmail.com]
> Sent: Tuesday, June 10, 2003 2:21 PM
> To: security-basics@securityfocus.com
>
> >From: "Des Ward" <des.ward@ntlworld.com>
> >The second means that all traffic has to traverse your LAN
> to get to the
> >'Unprotected' DMZ systems and also could leave your internal
> LAN open to
> >attack.
>
> My ASCII drawing didn't come out very well it was supposed to
> represent a
> tri-homed firewall, which, to the best of my knowledge is
> just as secure as
> a two firewall setup.
>
> Chris Berry
> compjma@hotmail.com
> Systems Administrator
> JM Associates
>
> "Gold is for the mistress - silver for the maid
> Copper for the craftsman cunning in his trade.
> "Good!" said the Baron, sitting in his hall
> But steel - cold steel is master of them all." -- Rudyard Kipling
>
> _________________________________________________________________
> Help STOP SPAM with the new MSN 8 and get 2 months FREE*
> http://join.msn.com/?page=features/junkmail
>
>
> --------------------------------------------------------------
> -------------
> Evaluating SSL VPNs' Consider NEOTERIS, chosen as leader by
> top analysts!
> The Gartner Group just put Neoteris in the top of its Magic Quadrant,
> while InStat has confirmed Neoteris as the leader in marketshare.
>
> Find out why, and see how you can get plug-n-play secure
> remote access in
> about an hour, with no client, server changes, or ongoing maintenance.
>
> Visit us at: http://www.neoteris.com/promos/sf-6-9.htm
> --------------------------------------------------------------
> --------------
>
>
>
---------------------------------------------------------------------------
Evaluating SSL VPNs' Consider NEOTERIS, chosen as leader by top analysts!
The Gartner Group just put Neoteris in the top of its Magic Quadrant,
while InStat has confirmed Neoteris as the leader in marketshare.
Find out why, and see how you can get plug-n-play secure remote access in
about an hour, with no client, server changes, or ongoing maintenance.
Visit us at: http://www.neoteris.com/promos/sf-6-9.htm
----------------------------------------------------------------------------
- Previous message: Chris Berry: "Re: Firewall and DMZ topology"
- Maybe in reply to: William J. Burgos: "Firewall and DMZ topology"
- Next in thread: Steve Bremer: "RE: Firewall and DMZ topology"
- Reply: Steve Bremer: "RE: Firewall and DMZ topology"
- Reply: ed: "RE: Firewall and DMZ topology"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ]
Relevant Pages
|
