DHCP allow same IP address with a different MAC address



  • This was allowed in Pf Sense Version 1 but blocked in the latest Version 2.
    I am asking, to have it be a warning when performing a add item.  But, allow it to be added if the user continues.  Or, have a option in DHCP to allow or block.

    To see this in PfSense, go to …
    Services -> DHCP Server on the "DHCP Static Mappings for this Interface"
    Add a IP Address.
    Try to add the same IP address with a different MAC address.  It will not allow the same IP Address to be added with a different MAC address.

    Why is this important to me?
    I have a bunch of devices (Security cameras) which can be on the network as Wired or Wireless (The wired and wireless in these devices have different MAC addresses).  But, they would never be both wired and wireless at the same time.  But, they should maintain the same IP Address for that device for connectivity reasons.

    This was all allowed in V1.

    Thank you for everything you do.  Love Pf Sense!


  • Rebel Alliance Global Moderator

    So they fixed the problem in v1.. What your asking for is a borked setup!!!  You can not logically reserve the same IP for 2 different macs.  If you want your device to have the same IP be it wired or wireless.  Set one of them to be static on the device.