Where should I run NAT from?

Posted on 2006-05-15
Last Modified: 2010-03-18
I currently have a Cisco 1720 series router configured as if it was a gateway for all other equipment on my network, say, I have a netscreen firewall with NAT turned on forwarding all internet traffic to this ip address and the wan on this same subnet, My question is should I be giving the new 2800 series router I am replacing the 1720 with an internal ip for it's lan port and let the router do all NAT or should I just leave the network alone and continue to allow my firewall to do all NAT? What are the benefits of letting the router do NAT as opposed to the firewall which is working fine?
Note: The 2800 router does not have firewall nor VPN enabled as the Netscreen firewall is handling all of this also!
Question by:ScubeduFan
    1 Comment
    LVL 3

    Accepted Solution

    use the netscreen. you should have the external ip available on one device only, this will mimimise your risks of hacking or dos. since nat is a basic form of a firewall it would make more logical sense to use the netscreen as both your nat and firewall service.

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