The first time you boot-up your appliance, you will need to connect a workstation (laptop or desktop) to the Green (LAN) interface of the device.
If you are connecting directly from your device to the appliance, then you will most likely require a crossover cable.
If you are accessing the appliance through a switch or hub, you can use a simple straight-through Ethernet cable.
The default IP of the appliance is 192.168.0.15, so you will need to set a static IP on your local machine within that Class C subnet (/24). So, for example, you could set your device to use the IP 192.168.0.100 with a netmask of 255.255.255.0.
Panda GateDefender eSeries default IP: https://192.168.0.15:10443