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How to downgrade firmware versions in SG 450?

specz
I recently update my firmware to 9.308 to 9.312-8 and we are experiencing constant http proxy not running - restarted notifications every 1 - 2 hours. 

I just want to know if its possible to revert back the firmware from 9.312-8 back to 9.308? I'm using the appliance SG 450.


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  • 0
    Have some problems too after updating 9.312-8,

    but i must confess i never installed an appliance from the ground up...

    is there maybe a guide how to do this? i heard of a special sophos USB stick...

    Thank you.
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  • 0
    Have some problems too after updating 9.312-8,

    but i must confess i never installed an appliance from the ground up...

    is there maybe a guide how to do this? i heard of a special sophos USB stick...

    Thank you.
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