# Engine Editor > Interfaces

Use this branch to configure the necessary interfaces and IP addresses for the Security Engine.

Note: By default, two interfaces 0 and 2 are already added for the predefined engine or when you create a single engine. Where, interface 0 is designated for the external interface, and interface 2 is designated for the internal interface.

Option | Definition
--- | ---
Add | Adds an interface or IP address of the specified type: Layer 3 Physical Interface (Available for Single Engines, Engine Clusters, Virtual Engines, and Master Engines in the Engine/VPN role) Layer 2 Physical Interface (Available for Single Engines, Engine Clusters, Virtual Engines, and Master Engines in the Engine/VPN role) Physical Interface (Available for all engine types except Single Engines, Engine Clusters, Virtual Engines, and Master Engines in the Engine/VPN role) VLAN Interface (Available for all engine types) IPv4 Address (Not available for Virtual IPS engines or Virtual Layer 2 Engines) IPv6 Address (Not available for Virtual IPS engines or Virtual Layer 2 Engines) ADSL Interface (Available for Single Engines and Engine Clusters) Tunnel Interface (Available for Single Engines, Engine Clusters, and Virtual Engines) Modem Interface (Available for Single Engines) Wireless Interface (Available for Single Engines) SSID Interface (Available for Single Engines) Switch (Available for Single Engines) Port Group Interface (Available for Single Engines) CAUTION: Physical Interfaces for Virtual Engines are automatically created based on the interface configuration in the Master Engine properties. The number of Physical Interfaces depends on the number of interfaces allocated to the Virtual Engine in the Master Engine. Physical Interfaces that you add to Virtual Engines might not be valid.
Edit | Allows you to change the properties of the interface or IP address.
Remove | Removes the selected interface or IP address.