bogon
jargonnetworkingsecurity
A packet claiming a source address that could never legitimately appear on the public internet.
The word comes from hacker slang for the imaginary quantum of bogosity, then hardened into a real networking term: bogons carry unallocated or private source addresses and usually signal spoofing or misconfiguration. Networks filter them at the edge with bogon lists, since nothing good arrives from an address that should not exist.
Also known as: bogon, bogon packet, martian packet