From owner-freebsd-questions@FreeBSD.ORG Thu May 20 05:24:48 2010 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id F0E70106566B for ; Thu, 20 May 2010 05:24:48 +0000 (UTC) (envelope-from m.seaman@infracaninophile.co.uk) Received: from smtp.infracaninophile.co.uk (gate6.infracaninophile.co.uk [IPv6:2001:8b0:151:1::1]) by mx1.freebsd.org (Postfix) with ESMTP id 635C08FC1C for ; Thu, 20 May 2010 05:24:48 +0000 (UTC) Received: from seedling.black-earth.co.uk (seedling.black-earth.co.uk [81.187.76.163]) (authenticated bits=0) by smtp.infracaninophile.co.uk (8.14.4/8.14.4) with ESMTP id o4K5OilK064745 (version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO); Thu, 20 May 2010 06:24:44 +0100 (BST) (envelope-from m.seaman@infracaninophile.co.uk) Message-ID: <4BF4C79B.3070804@infracaninophile.co.uk> Date: Thu, 20 May 2010 06:24:43 +0100 From: Matthew Seaman Organization: Infracaninophile User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.1.9) Gecko/20100317 Thunderbird/3.0.4 MIME-Version: 1.0 To: Chuck Swiger References: <9D3EAB27-FC60-4B6E-91EE-6110D0061805@mac.com> In-Reply-To: <9D3EAB27-FC60-4B6E-91EE-6110D0061805@mac.com> X-Enigmail-Version: 1.0.1 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Virus-Scanned: clamav-milter 0.96 at lucid-nonsense.infracaninophile.co.uk X-Virus-Status: Clean X-Spam-Status: No, score=2.0 required=5.0 tests=DKIM_ADSP_ALL,SPF_FAIL autolearn=no version=3.3.1 X-Spam-Level: ** X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on lucid-nonsense.infracaninophile.co.uk Cc: Marco Beishuizen , freebsd-questions@freebsd.org Subject: Re: downloading e-mail is blocking network X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 May 2010 05:24:49 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 19/05/2010 21:48:36, Chuck Swiger wrote: > On May 19, 2010, at 1:44 PM, Marco Beishuizen wrote: >> On Wed, 19 May 2010, Chuck Swiger wrote: >>> Are you using NAT? >> >> Not that I know of. > > You presumably would know from the IP your machine has-- if it's RFC-1918 unroutable, NAT is involved. > >>> It sounds like something has a limited number of NAT state slots available, and is dropping connections past that limit. It probably will help to try to serialize the activity of fetchmail / procmail so that they aren't opening new connections for every email being processed, if that is what is going on. >> >> Seems worth trying to increase this number but how do I do that? Is this changable in FreeBSD or do I change this in the modem (couldn't find anything about this in the modem though)? > > It would be in whatever device is doing NAT, assuming it is being used. > Running tcpdump against your traffic during this sort of problem would likely be informative. Hmmm... I wonder if it could be something like this? http://www.benzedrine.cx/ackpri.html although at first glance, the traffic flows would be in the wrong direction to trigger this effect. Cheers, Matthew - -- Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard Flat 3 PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate Kent, CT11 9PW -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.14 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkv0x5sACgkQ8Mjk52CukIzCBACdGFOr54HVxLPV6XRwK9PFu6KF zhsAnRm4m7sIH9/CeMXKIcopWhubbn2G =DJjY -----END PGP SIGNATURE-----