one of our client is having cisco 2800 series router and he is using internet through leaseline and also using firewall but his requirment is that if in future his firewall goes down then in that condition he wants to use the internet by giving static ip and gateway of router infact we had tried a lot for that by connecting router to switch instead of firewall but he is not getting internet but when i am taking the pc in public ip range then he gets the internet but the client wants the internet through private ip range. The following is his network connectivity.
routers eth0/0 ip is 192.168.0.3
eth0/1 ip is public ip
his eth0/0 is connected to switch and eth0/1 is connected to firewall and firewall is connected to switch. In this way his internet is working properly but he wants internet without firewall but in private ip range.