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Listen to a port that is in use [duplicate]
原标题:
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Closed 13 years ago.

Possible Duplicate:
Get connecting IP from specified ports that using by other program.

If a port is used by a program, is there any way I can listen that port and get the connected IP on that port?

最佳回答
  1. No, you cannot listen on a port that another process is already listening on.
  2. But yes, you can determine the TCP/IP connections currently active on that port, as has been answered in your exact duplicate question (namely using netstat).

If this doesn t answer your question, you should try to give more information what you re trying to achieve.

问题回答

You can also sniff whole network interface, and filter your related ports of interest.

I m not sure how exactly you d do it in code, but the information is available by running netstat -b.





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