From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Cc: Andi Kleen <andi@firstfloor.org>,
Glenn Griffin <ggriffin.kernel@gmail.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Add IPv6 support to TCP SYN cookies
Date: Tue, 5 Feb 2008 21:20:17 +0000 [thread overview]
Message-ID: <20080205212017.5db50114@core> (raw)
In-Reply-To: <20080205203911.GA9891@2ka.mipt.ru>
> How does syncookies prevent windows from growing?
Enabling them doesn't.
> Most (if not all) distributions have them enabled and window growing
> works just fine. Actually I do not see any reason why connection
> establishment handshake should prevent any run-time operations at all,
> even if it was setup during handshake.
Syncookies are only triggered if the system is under a load where it
would begin to lose connections otherwise. So they merely turn a DoS into
a working if slightly slower setup (and > 64K windows don't matter for
most normal users, especially on mobile devices).
next prev parent reply other threads:[~2008-02-05 21:28 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-04 23:01 [PATCH] Add IPv6 support to TCP SYN cookies Glenn Griffin
2008-02-05 15:55 ` Andi Kleen
2008-02-05 15:42 ` Alan Cox
2008-02-05 16:39 ` Andi Kleen
2008-02-05 16:03 ` Alan Cox
2008-02-05 16:48 ` Andi Kleen
2008-02-05 16:14 ` Alan Cox
2008-02-05 20:50 ` Willy Tarreau
2008-02-05 18:29 ` Glenn Griffin
2008-02-05 19:25 ` Ross Vandegrift
2008-02-05 20:11 ` Andi Kleen
2008-02-05 21:23 ` Ross Vandegrift
2008-02-06 8:53 ` Andi Kleen
2008-02-07 19:44 ` Ross Vandegrift
2008-02-08 12:07 ` Andi Kleen
2008-02-12 20:38 ` Ross Vandegrift
2008-02-05 20:02 ` Andi Kleen
2008-02-05 20:39 ` Evgeniy Polyakov
2008-02-05 20:53 ` Andi Kleen
2008-02-05 21:50 ` Evgeniy Polyakov
2008-02-05 21:20 ` Alan Cox [this message]
2008-02-05 21:52 ` Evgeniy Polyakov
2008-02-05 21:20 ` Willy Tarreau
2008-02-05 22:05 ` Alan Cox
2008-02-06 1:52 ` Glenn Griffin
2008-02-06 7:50 ` Andi Kleen
2008-02-06 17:36 ` Glenn Griffin
2008-02-06 18:45 ` Andi Kleen
2008-02-06 23:03 ` Glenn Griffin
2008-02-06 9:13 ` Evgeniy Polyakov
2008-02-06 18:30 ` Glenn Griffin
2008-02-07 7:24 ` Evgeniy Polyakov
2008-02-07 9:40 ` Eric Dumazet
2008-02-08 5:32 ` Glenn Griffin
2008-02-08 5:49 ` Glenn Griffin
2008-02-11 16:07 ` YOSHIFUJI Hideaki / 吉藤英明
2008-02-18 23:45 ` Glenn Griffin
2008-02-13 7:31 ` YOSHIFUJI Hideaki / 吉藤英明
2008-02-05 19:57 ` Jan Engelhardt
2008-02-05 21:25 ` Alan Cox
-- strict thread matches above, loose matches on Subject: below --
2008-02-04 23:01 Glenn Griffin
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