The “N” in CAN stands for network, after all. The trick is to create a device ID for each desired CANSerial interface, which is done in his library using the usual Arduino setup step.

In the middle are options like this, which handle the CAN interface and are controlled via SPI (such as from an Arduino or Raspberry Pi).

An Arduino can interface with them but the code is a bit tricky and to get a webpage of it starts costing alot. You can get a standalone server here but I have no idea how well they work.

Nuvoton Technology has announced an Arduino-like development board for its own Arm Cortex-M4 based M467 “Ethernet – crypto microcontroller series”, it calls them. The board, ‘NuMaker-UNO-M4’ has the ...