Bogon

Definition - What does Bogon mean?

A bogon is an bogus IP address from the bogon space, which is a set of IP addresses not yet officially assigned to any entity by the Internet Assigned Number Authority (IANA) or a regional Internet registration institute.

Bogon IP addresses are legitimate addresses. You may see a bogon IP
address as a result of a misconfiguration (whether intentional or
unintentional) that fools a recipient about a sender's legitimate IP
address. Bogon IP addresses are popular in hacking or malicious
activities and are used by spammers and those who initiate distributed
denial-of-service attacks. As such, many Internet service providers and
firewalls block bogons.

A bogon is also known as a bogon space or bogon IP address.

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