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Date: Tue, 1 Jun 2004 19:03:27 -0500 (CDT)
From: Mike Silbersack <silby@silby.com>
To: Kris Kennaway <kris@obsecurity.org>
In-Reply-To: <20040601231213.GA3894@xor.obsecurity.org>
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References: <20040601120238.B44353@atlantis.atlantis.dp.ua>
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cc: Dmitry Pryanishnikov <dmitry@atlantis.dp.ua>
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Subject: Re: net.inet.ip.portrange.randomized=1 hurts
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On Tue, 1 Jun 2004, Kris Kennaway wrote:

> On Tue, Jun 01, 2004 at 12:05:35PM -0500, Mike Silbersack wrote:
> > Sounds like something that should be dealt with on the server's end.  Some
> > of the changes we've made in 5.x might fix the problem, but I don't think
> > anyone has looked into that specific case.
>
> Is this also the cause of the mysql server connection failures
> reported on freebsd-stable@?
>
> Kris

Yes, it is possible that random ephemeral port allocation could cause the
MySQL problems, if the connection rate is extremely high.  If it's
happening, it would show up in the form of sockets stuck in the SYN_SENT
state.  If one of the people reporting problems can verify it, I could
backport the changes I made to handle this edgecase in 5.x.

Mike "Silby" Silbersack