arpwatch detects bogon or flip flop for 0.0.0.0

Solution Verified - Updated -

Issue

  • arpwatch detects bogon on 0.0.0.0
  • arpwatch detects flip flop on 0.0.0.0 with bogons disabled
  • arpwatch logs messages like:
arpwatch: bogon 0.0.0.0 52:54:0:aa:aa:aa
arpwatch: bogon 0.0.0.0 52:54:0:bb:bb:bb

and/or:

arpwatch: flip flop 0.0.0.0 52:54:0:aa:aa:aa (52:54:0:bb:bb:bb)
arpwatch: flip flop 0.0.0.0 52:54:0:bb:bb:bb (52:54:0:aa:aa:aa)

Environment

  • Red Hat Enterprise Linux
  • arpwatch service running to monitor ARP, bogons, and IPv4 duplicate addresses
    • arpwatch-2.1a15-16.el6.x86_64
    • arpwatch-2.1a15-33.el7.x86_64

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