Date: Tue, 21 Nov 2006 15:35:03 -0500 From: Chuck Swiger <cswiger@mac.com> To: Graham Bentley <admin@cpcnw.co.uk> Cc: freebsd-questions@freebsd.org Subject: Re: Slow Surfing all of Sudden !? Message-ID: <456362F7.1060109@mac.com> In-Reply-To: <op.tjduq5l6t4j7n6@localhost.cpcnw.co.uk> References: <20061121120050.01E5C16A4D4@hub.freebsd.org> <op.tjc8z0z1t4j7n6@localhost.cpcnw.co.uk> <456359FF.8050602@mac.com> <op.tjduq5l6t4j7n6@localhost.cpcnw.co.uk>
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Graham Bentley wrote: > On Tue, 21 Nov 2006 19:56:47 -0000, Chuck Swiger <cswiger@mac.com> 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.
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