Invention Grant
US08719926B2 Denial of service detection and prevention using dialog level filtering 失效
使用对话级别过滤拒绝服务检测和预防

Denial of service detection and prevention using dialog level filtering
Abstract:
A method may include receiving a session initiation protocol (SIP) request message and determining whether a dialog exists corresponding to the request message. The method may also include determining whether the dialog is in a first phase or a second phase when a dialog exists corresponding to the session control protocol message and querying a table indicating valid protocol requests for the determined phase to determine whether the received request message is valid. The method may include rejecting the request message when determined that the request message is not valid.
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