I have two networks with the same private IP range (192.168.1.0/23) behind PIX firewalls.
The PIX firewalls have IPSec VPN tunnels connecting them.
Changing the IP range is not possible (due to some political limitations).
Is it possible for these two networks to talk?
I'm imagining some sort of NAT function before the VPN tunnel (or before the PIX) to convert one network range from 192.168.1.0/23 to 192.168.2.0/23 and then changing the VPN ACLs to look for 192.168.2.0/23 on the changed side.