From mboxrd@z Thu Jan  1 00:00:00 1970
From: Robert Nichols <rnicholsNOSPAM@comcast.net>
Subject: Re: block + kill connections
Date: Sun, 08 Jan 2006 16:04:49 -0600
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bright true wrote:
> Hello ,
> 
> How to block plus kill all currently opened connections from specific ip address
> 
> on all ports .
> 
> i tryed using :
> 
> iptables -I INPUT -s 1.2.3.4 -j DROP
> 
> but seems to be it doesn't kill the active connections , it works only for new
> 
> incoming connections

That will prevent communication by blocking any further incoming
packets, but won't do anything to tear down the connection.  See
if something like this works better:

iptables -I INPUT -s 1.2.3.4 -p tcp --tcp-flags ! FIN,RST NONE -j REJECT 
--reject-with tcp-reset

-- 
Bob Nichols         Yes, "NOSPAM" is really part of my email address.