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11.17.2008 at 07:58PM PST, ID: 23913136
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Whta is the best practice network design?

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8.6
Tags:

Microsoft, windows, 2003, Firewall, router

I would like to know what's the best practice of network design. I found 3 design as shown in the attachment.

First one - Use only way firewall with 3 interface (3 subnets)

Second one - Use 2 firewalls. For the aspect of security, I think this is same as the first one. If I can add one more interface on the front firewall, I can simply remove the second firewall.

Third one - Use 2 firewall. But there is nothing in DMZ. The second firewall has 3 interfaces. DMZ is there.

Question 1:
I think first and second design are the same, what do you think?
Question 2:
Do you think third one is more secure than others? or it's too much?
Question 3:
Those designs here use ISA firewall. If I replace all ISA firewalls by Cisco routers, it should make no difference? I have Cisco 2514 and 2501 router, what kind of design I can do?


 
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