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  • #2142274

    APC surge protector and cyber security tools – network

    by crich75 ·


    If using a APC power surge protector and the laptop is only connected to the protector (the surge protector has an Ethernet in and Ethernet out port), would cyber security network monitoring tools be able to read the MAC address of the connected laptop or only the MAC address of the APC power surge protector?

    Laptop connected to > APC surge protector connected to > Ethernet port

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    • #2417952

      Not sure about that Surge Protector

      by oh smeg ·

      In reply to APC surge protector and cyber security tools – network

      But the ones I use do not have MAC Addresses they are a pass through setup with a Fusible Link in them to prevent any surges from passing the Surge Protector they do not have anything inside them except for wires between the two ports.

      If a surge comes down the cable the wires **** that is as simple as I can put it and the connection stops with hopefully no surge going past the Protector. Of course depending on the Rise Time of the surge things that actually happen may be different as the **** time of the connection may be slower than the Rise Time of the surge. Typically Surge Protectors do their thing in around 4 milliseconds but Rise Times in Power Surges can be measured in shorter time frames than that particularly if a Lighting Strike is involved.

      Even then depending on how well built the Surge Protector is the gap that is formed when the Surge Protector triggers may not be large enough for a High Speed High Current Event and the surge can jump the gap that is caused before it gets diverted to Earth it all depends on how much Current is involved. However for normal Surges on Power Lines where some sort of animal flies into overhead power lines they work a treat but the problems arise if High Tension Transmission lines come into contact with Power Distribution lines which can happen in accidents when vehicles hit Power Poles so instead of your normal Mains Voltage you get whatever passes for Transmission Voltages in your part of the world. Here in Australia Mains Voltage is 240 Volts but the Transmission Lines carry 33,000 Volts at a somewhat higher current so things can get very nasty very quickly long before any Surge Protector can react.

      But back to your question all the Surge Protectors I have looked at that have Ethernet Filtering no not have any Network addressing they just protect the one line and filter Overvoltage Events by dumping that excess voltage to earth so by fitting this device it should have no impact on your Network Addressing but it may introduce a Speed Limit to the speed of the network so if you have a Gigabyte speed network fitting the filtering protector may limit the speed of everything past the protector to 100 MBS or lower it all depends on the rated speed of the filter.

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