Is it OK to install common DSL firewall router?

[dexjjang]

Hi,

I'm trying to install a common DSL/Cable firewall router for peripheral security between LAN and Internet.

My approach is to connect outside line to Cisco 1601 router to firewall to LAN.

I heared that it could be done if I turn off NAT from Cisco.

I'd like to make sure if it works that way.

If not, any suggestion for simple, cost-effective way to have protection?

Thanks in advance.

[bwalchez]

Well you could put the firewall feature set on the 1601 and eliminate the need for the firewall box. Otherwise, get a simple Ethernet firewall box like the PIX 506 and gateway it at the outside router. Have it do NAT and just route all that traffic to your ISP.