I am configuring my new Sonicwall firewall, the old firewall is Netscreen 25. My Exchange is using 1 to 1 NAT on Netscreen 25 for natting public ip to LAN ip. If I configure the same 1 to 1 NAT on my new Sonicwall firewall while the Netscreen 25 is active, what happen?
The Sonicwall is using another public ip and another LAN ip on the same subnet. So the Sonicwall is able access to internet.