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RE: [FW1] If a single firewall with 3 NIC's a considered a DMZ?
Okay.... I've got to ask a stupid question here.
I've seen several posts on this thread describing a traditional DMZ as an
extra NIC or two in the firewall from which DMZ machines branch off.
I've always thought that a DMZ was off the router. Such as:
Internet
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---Router---
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Firewall DMZ boxes
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Internal LAN
Is this also a reasonable DMZ, or is having boxes directly off the router
generally a no-no? I've got a hub sitting directly off the router, to which
i have 3 machines attached in what i consider a DMZ. Is this reasonable?
Stupid?
If a DMZ is off a 3rd NIC on the firewall, the firewall software does NO
protection, correct? It just passes all traffic to that subnet without
questions? Or does it also do some protection of DMZ boxes?
Cheers,
Brian Aust
-----Original Message-----
From: Dean Cunningham
To: '[email protected]'
Sent: 1/25/01 9:15 PM
Subject: RE: [FW1] If a single firewall with 3 NIC's a considered a DMZ?
Hi Alan,
Just to extend it a bit, there is no reason to limit your thoughts to
just
"a dmz".
You can have multiple DMZs to keep your paranoia and your security
policy
happy :-)
for example you could decide to put your dialup users in a separate dmz
to
limit their access to internal resources and to protected them from
potentially compromised machines in "the dmz"
Internet
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Router
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Dialup Users -------Firewall ------- Web servers
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Internal network
-----Original Message-----
From: James Edwards [mailto:[email protected]]
Sent: Friday, 26 January 2001 5:37 AM
To: 'Allan Pratt'; [email protected]
Subject: RE: [FW1] If a single firewall with 3 NIC's a considered a DMZ?
Try this:
Internet
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Firewall ------- Web servers
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Internal network
You wouldn't want your web server and other stuff just hangin out in the
breeze like your first example and having two firewalls, while more
secure
is a lot of overhead. This way, you use one firewall to control access
to
your DMZ from both the inside and outside networks.
This is what I always understood to be the "classic" DMZ layout.
Jim Edwards
Systems Manager
Texas Secretary of State
-----Original Message-----
From: Allan Pratt [mailto:[email protected]]
Sent: Thursday, January 25, 2001 9:28 AM
To: [email protected]
Subject: [FW1] If a single firewall with 3 NIC's a considered a DMZ?
Hi,
Please help settle some confusion.
If a single firewall with 3 NIC's a considered a DMZ?
I always thought that a DMZ was:
Internet Access router <=> web/ftp servers & Bastion host <=>
Firewall
or better yet...........
Internet Access router <=> Firewall <=> web/ftp servers & Bastion host
<=> Firewall
Please clarify
Thanks.
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