A TCP reset attack is a DoS (denial-of-service) attack type that uses fake TCP reset packets to stop an established TCP connection between two parties. These attacks may interfere with online services, overwhelm servers, or even hijack user sessions, allowing perpetrators to obtain unauthorized access to the system.

How a TCP Reset Attack Functions

A spoofed TCP reset occurs when a hacker transmits fraudulent TCP reset packets (control messages that enable one party to discontinue a TCP connection unilaterally, normally due to an error or the necessity to close a connection forcefully) to one or both parties. The fake reset seems to be transmitted from a trustworthy source, prompting the receiving party to terminate the connection.

Preventing TCP Reset Attacks