I have to change the company IP addresses from one block to another. My current plan is to replace the PIX entries one-to-one. For instance if the IP addresses are
outside old outside new inside
209.168.5.1 210.168.5.1
192.168.5.1
209.168.5.2 210.168.5.2
192.168.5.2
209.168.5.3 210.168.5.3
192.168.5.3
209.168.5.4 210.168.5.4
192.168.5.4
I replace old with new in the PIX config. The network is heterogeneous with some Linux and some Windows. Do I need to change the IP addresses on each machine's interface (currently the interface has inside IP address) ? I am hoping I don't need to.
Also, how do I change the IP address of firewall itself?
Upstream to the firewall there is a router managed by our ISP. Do I have to communicate the ISP to forward packets to the new firewall?
Thanks for your help