Slow Surfing all of Sudden !?
cswiger at mac.com
Tue Nov 21 12:36:15 PST 2006
Graham Bentley wrote:
> On Tue, 21 Nov 2006 19:56:47 -0000, Chuck Swiger <cswiger at 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.
> 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  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.
: Thanks but no thanks, Massive, EA, & Ubisoft.
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