[Cialug] Network slowness

[Tom Sellers]

Aren't the DNS settings supplied by DHCP?  If I go into Desktop/Administration/Networking and attempt to change the DNS settings they get set back to what they are originally.  


--- On Mon, 2/2/09, Allen Kiddoo <adk at 52761.com> wrote:

> From: Allen Kiddoo <adk at 52761.com>
> Subject: Re: [Cialug] Network slowness
> To: "Central Iowa Linux Users Group" <cialug at cialug.org>
> Date: Monday, February 2, 2009, 8:37 PM
> I always set my dns to opendns.com 208.67.220.220 and
> 208.67.222.222 -
> fast and reliable.
> 
> Allen Kiddoo
> 
> On Mon, Feb 2, 2009 at 8:18 PM, Jeff Chapin
> <chapinjeff at gmail.com> wrote:
> > Forgive me for asking the obvious, but does nslookup
> return quickly?
> >
> > $time nslookup www.yahoo.com
> >
> > If this is slow, double check the file
> /etc/resolv.conf. It should have
> > something like:
> > $ cat /etc/resolv.conf
> > # Generated by NetworkManager
> > nameserver 192.168.1.1
> >
> > only with the IP of your nameserver. I would compare
> to the settings on
> > your windows box (*shudder*). If that file looks fine,
> I would go back
> > to nslookup and test each nameserver and see if one is
> slow or timing out.
> >
> > I would also try something like :
> > $ traceroute www.yahoo.com
> > and see if there are any particularly slow hops. Your
> name server may
> > also be a good IP to traceroute ;-)
> >
> > Again, forgive me if this is too basic, I would rather
> start with the
> > 'obvious' though.
> >
> >
> > Tom Sellers wrote:
> >> I was wondering if anyone had experienced a
> problem such as this.
> >>
> >> When I ping a site such as www.yahoo.com it takes
> several seconds  for it to resolve.  This is true from the
> laptop that I have loaded with Debian, but if I perform the
> same ping function from a Windows workstation it responds
> almost immediately.  If I ping the IP address for
> www.yahoo.com directly from the Debian machine it responds
> quickly just as the Windows machine did while pinging by
> name.
> >>
> >> I am connected to the network by an ethernet
> cable,
> >>
> >> Is this some issue with the network setup of the
> Debian machine?
> >>
> >> I found some information that indicated that being
> setup with IPV6 can cause such an issue.  I am not sure what
> the default setup for Debian 4.0 is.
> >>
> >> Any thoughts or suggestions?
> >>
> >> The machine seems to be funtioning normally other
> than for the fact that name resolution takes exceptionally
> long.
> >>
> >>
> >>
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