From owner-freebsd-questions@FreeBSD.ORG Tue Nov 21 20:36:14 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id D6E0416A4D0 for ; Tue, 21 Nov 2006 20:36:14 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from pi.codefab.com (pi.codefab.com [199.103.21.227]) by mx1.FreeBSD.org (Postfix) with ESMTP id C296443DE4 for ; Tue, 21 Nov 2006 20:34:52 +0000 (GMT) (envelope-from cswiger@mac.com) Received: from localhost (localhost [127.0.0.1]) by pi.codefab.com (Postfix) with ESMTP id 4393D5F5F; Tue, 21 Nov 2006 15:35:14 -0500 (EST) X-Virus-Scanned: amavisd-new at codefab.com Received: from pi.codefab.com ([127.0.0.1]) by localhost (pi.codefab.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id TEzI6-U9MhaQ; Tue, 21 Nov 2006 15:35:09 -0500 (EST) Received: from [192.168.1.251] (pool-68-161-95-165.ny325.east.verizon.net [68.161.95.165]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by pi.codefab.com (Postfix) with ESMTP id 0271E5CF0; Tue, 21 Nov 2006 15:35:08 -0500 (EST) Message-ID: <456362F7.1060109@mac.com> Date: Tue, 21 Nov 2006 15:35:03 -0500 From: Chuck Swiger User-Agent: Thunderbird 1.5.0.8 (Windows/20061025) MIME-Version: 1.0 To: Graham Bentley References: <20061121120050.01E5C16A4D4@hub.freebsd.org> <456359FF.8050602@mac.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org Subject: Re: Slow Surfing all of Sudden !? 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: Tue, 21 Nov 2006 20:36:15 -0000 Graham Bentley wrote: > On Tue, 21 Nov 2006 19:56:47 -0000, Chuck Swiger wrote: >> Run "tcpdump not port 80", and pay especial attention to the packets >> which are sent just before you notice these pauses. >> >> In general, it's probably a DNS lookup issue; you might find that >> disabling IPv6 lookups (unless you use IPv6) or running a local copy >> of bind with the -4 flag will help. > > Chuck, > > Thanks, tcpdump is cool :) You are welcome. > I can see use of my isp dns etc. Very oddly things have speeded up > again at some point this afternoon ? Perhaps, its not 'my fault' and the > isp are up to something ? It could be many things; tcpdump will help you identify the real cause(s). > Any tips for fine tuning tcp over adsl ? Check your path MTU if you are using ADSL via PPPoE; you might need to change your MTU down from the default of 1500 to 1492 or 1470 or so. The other thing to do is to set up a caching WWW proxy like Apache or Squid. > BTW - I compiled ipv6 out of my kernel - did I do bad ? Not if you don't use IPv6. > BTW2 - Is it worth configuring Bind for local use on a single box ? > Even from an educational viewpoint ? Sure. I just made my local nameserver authoritative for madserver.net so that a certain form of intrusive in-game advertising [1] doesn't work. And I've even set up a webserver which returns a 1x1 transparent pixel for all requests, and forwarded some annoying adserver domains to it. -- -Chuck [1]: Thanks but no thanks, Massive, EA, & Ubisoft.