The Spoofer project measures the Internet's susceptibility to spoofed source address IP
packets. Malicious users capitalize on the ability to "spoof" source IP addresses for
anonymity, indirection, targeted attacks and security circumvention. Compromised hosts
on networks that permit IP spoofing enable a wide variety of attacks.

We measure various source address types (invalid, valid, private), granularity (can you
spoof your neighbor's IP address?), and location (which providers are employing source
address validation?). Our research is particularly relevant given the regular appearance
of new spoofed-source-based exploits, despite decades of filtering effort.