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A note regarding our findings: Further experiments have led us to believe that our initial conclusions that indicated Comcast's responsibility for dropping TCP SYN packets and forging TCP SYN, ACK and RST (reset) packets was incorrect. Our experiments were conducted from behind a network address translator (NAT). The anomalous packets were generated when the outbound TCP SYN packets exceeded the NAT's resources available in it's state table. In this case, TCP SYN, ACK and RST packets were sent. We would like to thank Don Bowman, Robb Topolski, Neal Krawetz, and Comcast engineers for bringing this to our attention. We sincerely apologize for any inconvenience that this posting may have caused. Professors Grunwald and Sicker did not have the opportunity to review this data before it was posted. The responsibility, therefore, rests with the students who collected the data.