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TCP dump

tcp dump enables us to capture the packets over a network.
But there might be a problem when you run this on localhost.
Like you are running a socket program, and both server and client residdes in localhost only, then it will not work.

The reason for it is:
" It's not reaching the Network Card (NIC) actually when it's in localhost."

This problem has not been reported anywhere. So, always try this thing on two different machines, may be in a LAN. B'coz the request will never reach the card and will not filter request for a particular port.
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