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What is IP Spoofing?

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Uploaded on Mar 20, 2017

Please download here: http://spoofer.caida.org

The greatest security vulnerability of the Internet (TCP/IP) architecture is the lack of source address validation, i.e., any sender may put a fake source address in a packet, and the destination-based routing protocols that glue together the global Internet will get that packet to its intended destination. Attackers exploit this vulnerability by sending many (millions of) spoofed-source-address packets to services on the Internet they wish to disrupt (or take offline altogether). Attackers can further leverage intermediate servers to amplify such packets into even larger packets that will cause greater disruption for the same effort on the attacker's part.

Over the past several months, CAIDA, in collaboration with Matthew Luckie at the University of Waikato, has upgraded Rob Beverly's original spoofing measurement system, developing new client tools for measuring IPv4 and IPv6 spoofing capabilities, along with services that provide reporting and allow users to opt-in or out of sharing the data publicly. To find out if your network provider(s), or any network you are visiting, implements filtering and allow IP spoofing, point your web browser at http://spoofer.caida.org/ and install our simple client.

For more technical details about the problem of IP spoofing and our approach to measurement, reporting, notifications and remediation, see the slides from Matthew Luckie's recent http://www.caida.org/publications/pre..., presented to the Australian Network Operators Group (AusNOG) in September 2016.

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