| 摘要 |
PROBLEM TO BE SOLVED: To quicken transfer processing in a gateway by generally utilizing a fast pass regardless of uplink/downlink in the case of using a gateway as a URL filtering system.SOLUTION: The size information of an HTTP message to be transmitted from Content-Length of an HTTP header is checked, and the size information is added to the initial value of a sequence number included in a TCP header, and a value calculated by subtracting the maximum length of a packet from this is obtained as the maximum value. When the packet has the sequence number which is the maximum value or less, it is possible to determine that the packet has been already determined to be not a regulation object by URL filtering in the stage of an HTTP request. Thus, it is possible to perform fast pass processing by reading the sequence number in the TCP header afterwards. |
