Hello Everyone,
I recently purchased a Cisco ISR 4321 router. My network layout requires me to put a firewall behind this router and have this firewall reachable via public IP address. My ISP has provided 2 ethernet hand-off with /29 network. I have only 3 usable IP address and I'm trying to put this router and firewall on the same IP range. I know that this router comes with only 2 native ethernet ports and I will need to purchase a NIM module for an additional port for firewall connection. I'm using the 2 native ports in BDI configuraion for the ISP hand-off. My question is that can I configure router and firewall this way? and which NIM module for the router will allow me to have this configuration? Let me know if you have any other questions and any help will be greatly appreciated. Thanks.
