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Reference.org
TCP reset attack
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<p>A TCP reset attack, also known as a forged TCP reset or spoofed TCP reset, is a way to terminate a <a href="/facts/TCP_connection/WW4sPrt9">TCP connection</a> by sending a forged TCP reset packet. This tampering technique can be used by a firewall or abused by a malicious attacker to interrupt Internet connections. </p><p>As of 2025, the <a href="/facts/Great_Firewall/HeQNWc3u">The Great Firewall of China</a>, <a href="/facts/Internet_censorship_in_Iran/kFmkIwjy">Iranian Internet censors</a>, and <a href="/facts/Internet_censorship_in_Indonesia/PwvUR4Md">Indonesian TKPPSE Firewall system</a> are known to use TCP reset attacks to interfere with and block connections as a major method to carry out Internet censorship. </p>