Method and apparatus for preventing a denial of service (DOS) attack by selectively throttling TCP/IP requests
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United States of America Patent
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Sep 7, 2004
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N/A
app pub date -
Jun 26, 2000
filing date -
Jun 26, 2000
priority date (Note) -
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Abstract
According to the present invention, method, apparatus, and computer readable medium for preventing a DoS attack without notifying the DoS attacker are disclosed. In one embodiment, in a client/server environment, a DoS defense module determines a connection request rate for a particular client. The client is blocked if the connection request rate is determined to be above a first pre-determined threshold. If, however, the connection request rate is below the first threshold but above a second threshold, then the client's connection request rate is slowed, or throttled, down to a rate consistent with a connection delay interval that's is based upon a throttling factor.
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