A newer tool called tcpflow complements tcpdump and provides a way to do protocol flow analysis and to properly reconstruct data streams, regardless of packet order or retransmissions.

一个叫做tcpflow的新工具与tcpdump相辅相成，它提供协议流分析和适当地重构数据流的方法，而不管数据包的顺序或重发。

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Born as an IPS solution NetASQ rapidly leveraged their ability to do deep packet inspection, (or, as IDC terms it, complete content inspection) to apply policies based not just on source-destination-port, but on content of assembled packet streams.

FORBES: Demystifying Next Gen Firewalls and UTM