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With respect to the supported Charon-PAR emulated Ethernet configurations (RAW or TAP), please bear in mind the following when deploying Charon in a cloud environment:
- If dedicating a host NIC to the emulator, the emulated system and the guest system must use the same MAC address and IP address on the interface that were assigned to the interface by the cloud provider. On the Linux level, the IP address must be removed from the interface. A dedicated NIC can be a RAW or MACVTAP configuration (MACVTAP support was added in Charon-PAR 3.0.9). For cloud settings, MACVTAP is recommended. Please refer to Ethernet Configuration Notes for more information.
- If using a TAP interface, the bridge must be an internal bridge (not connected to the cloud LAN via a host NIC). The bridge must use a private address range different from the cloud LAN. The emulator can then communicate with the outside world via NAT, or with other other private networks via a routing configuration.
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