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IPFire can be configured using a serial console - which is a common way to configure network hardware like switches and firewalls. For that, a serial cable is required. Since modern computers no longer come with a serial port, a USB-to-serial adapter can be used as well.
Connect your firewall with the serial cable and your computer first and then power it on.
On any Linux-based computer, you can use
screen to connect to the serial console. The command is:
sudo screen /dev/ttyUSB0 115200
115200 is the default baud rate for IPFire.
/dev/ttyUSB0 is most likely the device node for a USB-to-serial adapter. If you are using an actual serial port on your computer, this would be
You can leave
screen by typing Ctrl-A K.
PuTTY is a great tool for connecting to a serial console. Start it, select "Serial" as connection type, and enter your serial interface as well as the baud rate of 115200. Most likely your serial interface will be called
Depending on the USB-to-serial adapter, a driver may need to be installed on the Mac. Information about the adapter should include a reference to the needed driver.
Launch the Serial app and in the Open Port window pick the adapter (in my case it is CP2102). Go to the menu Terminal > Settings and set the baud rate to 115200.