From owner-freebsd-questions@FreeBSD.ORG Wed May 19 20:48:57 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 94D9E106566C for ; Wed, 19 May 2010 20:48:57 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from asmtpout029.mac.com (asmtpout029.mac.com [17.148.16.104]) by mx1.freebsd.org (Postfix) with ESMTP id 7CC8A8FC18 for ; Wed, 19 May 2010 20:48:57 +0000 (UTC) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; charset=us-ascii Received: from cswiger1.apple.com ([17.209.4.71]) by asmtp029.mac.com (Sun Java(tm) System Messaging Server 6.3-8.01 (built Dec 16 2008; 32bit)) with ESMTPSA id <0L2O00B6NPT06D30@asmtp029.mac.com> for freebsd-questions@freebsd.org; Wed, 19 May 2010 13:48:37 -0700 (PDT) X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 ipscore=0 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx engine=6.0.2-1004200000 definitions=main-1005190150 X-Proofpoint-Virus-Version: vendor=fsecure engine=1.12.8161:2.4.5,1.2.40,4.0.166 definitions=2010-05-19_01:2010-02-06, 2010-05-19, 2010-05-19 signatures=0 From: Chuck Swiger In-reply-to: Date: Wed, 19 May 2010 13:48:36 -0700 Message-id: <9D3EAB27-FC60-4B6E-91EE-6110D0061805@mac.com> References: To: Marco Beishuizen X-Mailer: Apple Mail (2.1078) Cc: 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: Wed, 19 May 2010 20:48:57 -0000 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. Regards, -- -Chuck