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.. _serial:
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====================================
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Serial Console connectivity
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====================================
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The following device families offer a mini-usb connection which can be used for serial communication:
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* DEC600 series
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* DEC2600 series
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* DEC700 series
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* DEC2700 series
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* DEC800 series
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* DEC3800 series
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* DEC4000 series
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Supplied with the firewall is a mini-usb to usb cable, use this to connect the to your PC (Windows, Linux, Mac)
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next start your terminal program (Putty, screen, etc).
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The baudrate should be set to :code:`115200,8N1`
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.. _legacy_uart:
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**Legacy UART vs. UEFI serial**
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=====================================================================================================================
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Starting from OPNsense 22.1 (22.4 for the business edition) and the change to FreeBSD 13-STABLE, support for EFI
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serial has changed, which requires EFI based systems to disable legacy support to prevent confusing the operating system.
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Should you connect your Deciso appliance with a serial line and get limited output / no output from the point of
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handover to the OS, it is important your BIOS settings are updated to disable legacy UART.
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While in the BIOS, go to Setup Utility --> AMD CBS --> FCH Common Options --> UART Configuration Options --> UART 0 Legacy Options.
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and make sure this setting is set to **Disabled**.
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