Would like to ask you if Cisco PIX can do a "drop-in configuration mode" i.e. allows you to drop a firewall(Physically between the Internet router and the internal LAN) into an existing network without subnetting or changing the subnet of the LAN hosts.
Basically which means the network interfaces are all from the same IP / network segment.
Also, would also like to confirm the routing given that the above is possible:
(1) Outgoing: the default gw for the PIX going to be the router?
(2) Outgoing: the hosts default gw going to be the inside interface of the PIX?
(3) Incoming: how does it work from the router point-of-view? Any routing required here?
Pls advice..! Thxs