Correct firewall & router IP settings 1

[Finchmore]

Hi,

I am about to install a new firewall for a client of mine but am just a-little unsure as to how the firewall fits in with the existing router.

The client currently has internet/email access from their LAN via a router but, at the moment, no firewall protection. The router has an IP address of 192.168.1.1 but I seem to remember that the default IP address for the new firewall I propose to install is the same. My question is, do I leave the firewall with the same IP address as the router or does the firewall get a different IP address? If it is a different IP address, does this then become the new gateway IP address for the network?

I hope that makes sense!

Many thanks.

 

[rudeboy]

You should change the IP of the existig router. The f/w will get the existing IP since it will be connected to your LAN. This way, no changes need to be made to the PC's on the LAN. Just make the inside inteface of the router and the outside interface of the f/w part of a different private subnet like 10.0.0.1 and 10.0.0.2 for example.

10.0.0.x 192.168.1.x
router----------firewall------------LAN