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Date:      Fri, 23 Feb 2007 14:55:52 +0200
From:      Giorgos Keramidas <keramida@ceid.upatras.gr>
To:        RW <fbsd06@mlists.homeunix.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: PF slowing down file copies
Message-ID:  <20070223125552.GA2846@kobe.laptop>
In-Reply-To: <20070223023606.13be5e5e@gumby.homeunix.com>
References:  <200702202021.55723.pablo.fernandez@rs.com.ar> <19861fba0702211038p3144271ey1e30cf67311678ef@mail.gmail.com> <20070222143030.0b858e86@gumby.homeunix.com> <19861fba0702221445r3124eecbq852d774d0ed4e479@mail.gmail.com> <20070223023606.13be5e5e@gumby.homeunix.com>

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On 2007-02-23 02:36, RW <fbsd06@mlists.homeunix.com> wrote:
> On Thu, 22 Feb 2007 23:45:06 +0100 J65nko <j65nko@gmail.com> wrote:
> > The OP did not keep state on TCP connections using "flags S/SA". That
> > can cause problems for  TCP window scaling (defined in RFC 1323)  and
> > result in stalling connections.
> >
> > From http://undeadly.org/cgi?action=article&sid=20060928081238 under
> > "Create TCP states on the initial SYN packet"
>
> How can a TCP connection start with anything other than an initial SYN
> packet?

Misconfigured load-balancers are a common culprit for this sort of bug :)




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