From: Pascal Hambourg <pascal.mail@plouf.fr.eu.org>
To: netfilter@vger.kernel.org
Subject: Re: Best way to kill a live TCP connection?
Date: Tue, 11 Jan 2011 18:39:57 +0100 [thread overview]
Message-ID: <4D2C95ED.70805@plouf.fr.eu.org> (raw)
In-Reply-To: <4D2C8374.70408@tana.it>
Hello,
Alessandro Vesely a écrit :
> On 11/Jan/11 15:41, Jan Engelhardt wrote:
>> On Tuesday 2011-01-11 13:35, Alessandro Vesely wrote:
>>
>>> In particular, if it is possible/convenient to design an RST injector
>>> and how to attach it to iptables?
>>
>> If you use a ruleset that emits RST for NEW connections that are picked
>> up rather than SYN-new,
>>
>> -m conntrack --ctstate NEW -p tcp ! --syn --dport 22 -j REJECT
>> --reject-with tcp-reset
>>
>> .. makes it possible to RST-kill connections using `conntrack -D`.
>
> That's the most elegant method I've seen thus far. Thanks a lot!
However this sends only one RST to one side of the connection, leaving
the connection half-open - until the other side sends a packet and gets
a RST too. IMO it would be more elegant to send RSTs to boths sides of
the connection.
next prev parent reply other threads:[~2011-01-11 17:39 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-11 12:35 Best way to kill a live TCP connection? Alessandro Vesely
2011-01-11 14:41 ` Jan Engelhardt
2011-01-11 16:21 ` Alessandro Vesely
2011-01-11 17:39 ` Pascal Hambourg [this message]
2011-01-11 21:10 ` Grant Taylor
2011-01-11 22:31 ` Jan Engelhardt
2011-01-12 8:52 ` Alessandro Vesely
2011-01-18 17:50 ` Alessandro Vesely
2011-01-18 18:45 ` Gáspár Lajos
2011-01-19 13:32 ` Alessandro Vesely
2011-01-12 0:20 ` Pablo Neira Ayuso
2011-01-12 0:20 ` Pablo Neira Ayuso
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