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    Bridge interface and MAC address spoofing

    L2/Switching/VLANs
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    • Yanapa
      Yanapa last edited by

      Hi,

      I just spent a few hours to understand why I wasn't able to ping my gateway after enabling my bridge between my LAN_WIRED interface and my LAN_WIFI interface.
      Note that I was not able to ping my devices from pfSense console too.

      I read this documentation to enable it and to enforce the bridge MAC address:
      https://docs.netgate.com/pfsense/en/latest/bridges/interfaces.html

      I finally found that it was caused by the MAC address enforced on the bridge interface (that I got from an online generator): 0B:49:AE:AB:E2:84

      After removing it or replacing it with another one auto-generated by pfSense, it worked immediately.

      Can someone explain why it is not working when this MAC address is used ?

      johnpoz 1 Reply Last reply Reply Quote 0
      • johnpoz
        johnpoz LAYER 8 Global Moderator @Yanapa last edited by johnpoz

        0B as your first octet is a multicast mac address..

        https://networklessons.com/multicast/multicast-ip-address-to-mac-address-mapping

        0B would be 00001011

        Which means that multicast bit is set..

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        Yanapa 1 Reply Last reply Reply Quote 1
        • Yanapa
          Yanapa @johnpoz last edited by

          @johnpoz, thank you.

          1 Reply Last reply Reply Quote 0
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