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From: Pablo Neira Ayuso <pablo@netfilter.org>
To: Florian Westphal <fw@strlen.de>
Cc: netfilter-devel@vger.kernel.org,
	Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Subject: Re: [PATCH nf] netfilter: conntrack: lower timeout to RETRANS seconds if window is 0
Date: Mon, 20 Nov 2017 13:30:07 +0100	[thread overview]
Message-ID: <20171120123007.GA17331@salvia> (raw)
In-Reply-To: <20171119202728.13756-1-fw@strlen.de>

On Sun, Nov 19, 2017 at 09:27:28PM +0100, Florian Westphal wrote:
> When zero window is announced we can get into a situation where
> connection stays around forever:
> 
> 1. One side announces zero window.
> 2. Other side closes.
> 
> In this case, no FIN is sent (stuck in send queue).
> 
> Unless other side opens the window up again conntrack
> stays in ESTABLISHED state for a very long time.
> 
> Lets alleviate this by lowering the timeout to RETRANS (5 minutes),
> the other end should be sending zero window probes to keep the
> connection established as long as a socket still exists.

Applied, thanks!

      parent reply	other threads:[~2017-11-20 12:30 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-11-19 20:27 [PATCH nf] netfilter: conntrack: lower timeout to RETRANS seconds if window is 0 Florian Westphal
2017-11-20  7:41 ` Jozsef Kadlecsik
2017-11-20 12:30 ` Pablo Neira Ayuso [this message]

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