How to kill TCP client connections

Several times we are faced with a large number of TCP connections from the same source IP.
How to kill that connections?

This is an easy way:

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1. $ for i in `lsof -i tcp@client_ip_address| awk '{print $2}'`; do kill -9 $i; done   

$ for i in `lsof -i tcp@client_ip_address| awk '{print $2}'`; do kill -9 $i; done 

See also : tcpkill