We have a block of 5 IP addresses that we would like to use on our Firebox X Edge firewall. Everything has been working great using one IP address set statically on the External Network interface of the firewall, however we recently added a server and would like to assign another one of our static IP addresses to it. I have tried using the NAT section to create a 1:1 NAT to the internal IP address of the new server, but when I do this I am unable to access the Internet from any device behind the firewall. This continues until I uncheck the "Enable secondary IP addresses" box on the NAT screen. Once unchecked, after about 2 minutes I am able to reconnect to the internet.
What am I doing wrong? From all the manuals I have read, it should be as simple as enabling the secondary IP address and then creating an inbound rule to the 1:1 NAT rule. Any help is greatly appreciated.