关键词: FTP协议, 协议识别, 特征字检测, 协议自动分类

Abstract:

The development and popularization of the Internet lead to the development of the Internet broadband business, pushing the network supervision technology to the field of vision of people. Internet regulators and network service providers need to accurately understand the increasingly complicated Internet traffic through the network supervision technology. But, with the development of network technology, some traditional network supervision technologies gradually lose their original functions. Among them, traditional FTP port identification technology has been unable to identify the FTP protocol accurately. This paper proposes a FTP protocol identification method based on tagged word, in order to identify FTP data packets transferring on the existing network, and accurately detect the FTP protocol. This paper also puts forward a scheme, which combines with the FTP protocol port identification and FTP protocol tagged word identification. Compared with single FTP protocol port identification method, with no effect on identification efficiency, the scheme can improve the FTP protocol identification accuracy. Compared with single FTP protocol tagged word identification method, with no effect on identification accuracy, the scheme can improve the FTP protocol identification efficiency. In the end, this paper proposes an automatic extraction method of FTP features, which could classify the FTP protocols automatically.

Key words: FTP Protocol, protocols identification, tagged word detection, protocols automatic classification