| 摘要 |
A network authentication method, a method for a client to request authentication, a client, and a device are provided. The method includes: receiving synchronize (SYN) data sent by a client, where the SYN data includes a sequence number SEQ1 and a network parameter; sending synchronize acknowledge (SYN_ACK) data to the client in response to the SYN data, where the SYN_ACK data includes an acknowledgment number ACK2, and the value of ACK2 is a value obtained by carrying out a function transformation according to the network parameter of the SYN data; receiving RESET (RST) data sent by the client in response to the SYN_ACK data, where the RST data includes a sequence number SEQ3 or an acknowledgment number ACK3, and the value of SEQ3 or ACK3 is the same as that of ACK2, and the RST data further includes a network parameter the same as that of the SYN data; carrying out the function transformation according to the network parameter of the RST data to obtain a check value CHK; and passing the authentication of the client if CHK matches SEQ3 or ACK3. Therefore, the occupation of storage resources is reduced.
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