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Tcpdump is used to capture packets and tcpdump is incomplete.

Source: Internet
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Tcpdump is used to capture packets and tcpdump is incomplete.

The http packet of the post request sent by the client is captured by tcpdump only a little bit (the packet length is correct, but the actual content is indeed different ):


In win, wireshark is used to capture packets. The length and content are normal:


Cause Analysis: When Tcpdump is used for packet capture, the length of the captured data is not specified using the-s parameter, and the default length is 68 or 96 bytes.-s0 indicates no length limit.


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Related Keywords:
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