[Cialug] Network slowness

Thu Feb 5 00:07:12 CST 2009

Try pinging the IP address and see if that has the delay.  If there
isn't a delay, then your problem is with the DNS resolver.  If there is
a delay, then you have some other problem.

What do you have for the host line in /etc/nsswitch.conf?

johnl

-----Original Message-----
From: cialug-bounces at cialug.org [mailto:cialug-bounces at cialug.org] On
Behalf Of Tom Sellers
Sent: Wednesday, February 04, 2009 11:40 PM
To: Central Iowa Linux Users Group
Subject: Re: [Cialug] Network slowness

This is at home connected directly to my cable modem with an ethernet
cable from the linux laptop.

resolve.conf
--------------

search globalccs.net
nameserver 69.63.8.74
nameserver 69.63.8.73

requested responses
---------------------

bluto:/home/tsellers# time nslookup www.google.com
Server:         69.63.8.73
Address:        69.63.8.73#53

Non-authoritative answer:
www.google.com  canonical name = www.l.google.com.
Name:   www.l.google.com
Address: 74.125.95.103
Name:   www.l.google.com
Address: 74.125.95.104
Name:   www.l.google.com
Address: 74.125.95.147
Name:   www.l.google.com
Address: 74.125.95.99

real    0m1.075s
user    0m0.008s
sys     0m0.016s
bluto:/home/tsellers# time nslookup www.yahoo.com
Server:         69.63.8.73
Address:        69.63.8.73#53

Non-authoritative answer:
www.yahoo.com   canonical name = www.yahoo-ht3.akadns.net.
Name:   www.yahoo-ht3.akadns.net
Address: 209.191.93.52

real    0m1.336s
user    0m0.008s
sys     0m0.008s
bluto:/home/tsellers#

A ping to www.yahoo.com takes about 4.5 to 5 seconds to respond.

--- On Wed, 2/4/09, Jeff Chapin <chapinjeff at gmail.com> wrote:

> From: Jeff Chapin <chapinjeff at gmail.com>
> Subject: Re: [Cialug] Network slowness
> To: "Central Iowa Linux Users Group" <cialug at cialug.org>
> Date: Wednesday, February 4, 2009, 1:22 PM
> I am going to maintain that it sounds like a DNS issue.
> 
> What does your /etc/resolv.conf file have in it (at both
> locations)? A
> listing of the nameservers your windows machine would be
> helpful as well
> for comparison.
> 
> Please run the following commands while at home, and
> provide the
> answers, as well:
> # time nslookup www.yahoo.com
> # time nslookup www.google.com
> 
> Thanks,
> 
> Jeff
> 
> 
> Tom Sellers wrote:
> > OK  I brought my laptop to work today and connected it
> to our vendor only lan that allows only network access
> outside the plant to the internet etc. (No connection to our
> local network)    
> >
> > What do you know, the laptop responds much faster here
> and I am connected through a 10 mb hub.  
> >
> > I guess that either points to my home network or my
> internet provider as the source of this issue.  Funny that
> it only seems to affect this linux machine and not my
> Windows machines.  
> >
> > Suggestions?
> >
> >
> >
> >
> > --- On Tue, 2/3/09, Tom Sellers
> <tomsellers2001 at yahoo.com> wrote:
> >
> >   
> >> From: Tom Sellers <tomsellers2001 at yahoo.com>
> >> Subject: Re: [Cialug] Network slowness
> >> To: "Central Iowa Linux Users Group"
> <cialug at cialug.org>
> >> Date: Tuesday, February 3, 2009, 4:57 PM
> >> No.  I have a Motorola Surfboard cable modem and a
> Linksys G
> >> series wireless router/AP.
> >>
> >>
> >> --- On Tue, 2/3/09, Anthony Jeffries
> >> <ajeffri at gmail.com> wrote:
> >>
> >>     
> >>> From: Anthony Jeffries
> <ajeffri at gmail.com>
> >>> Subject: Re: [Cialug] Network slowness
> >>> To: "Central Iowa Linux Users Group"
> >>>       
> >> <cialug at cialug.org>
> >>     
> >>> Date: Tuesday, February 3, 2009, 12:56 PM
> >>> Just out of curiousity, does the OP have an
> Actiontec
> >>>       
> >> DSL
> >>     
> >>> modem? I had one
> >>> of those that insisted on listing itself as
> the first
> >>> nameserver and it gave
> >>> my Linux machines a several second delay
> resolving
> >>> hostnames.
> >>>
> >>> On Tue, Feb 3, 2009 at 12:07 PM, Colin Burnett
> >>> <cmlburnett at gmail.com> wrote:
> >>>
> >>>       
> >>>> On Tue, Feb 3, 2009 at 11:33 AM, Tom
> Sellers
> >>>>         
> >>> <tomsellers2001 at yahoo.com>
> >>>       
> >>>> wrote:
> >>>>         
> >>>>> 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.
> >>>>
> >>>> The -R flag to dhcpcd used to prevent it
> from
> >>>>         
> >> updating
> >>     
> >>> resolv.conf but
> >>>       
> >>>> that seems to no longer be there (in
> 4.0.2, maybe
> >>>>         
> >> that
> >>     
> >>> was under 3.x).
> >>>       
> >>>>  Looks like 4.x wants `-C resolv.conf` to
> disable
> >>>>         
> >>> that.
> >>>       
> >>>> So, yes, they generally are updated by
> DHCP but
> >>>>         
> >> you
> >>     
> >>> can disable that
> >>>       
> >>>> in some fashion.
> >>>>
> >>>>
> >>>> Colin
> >>>>
> _______________________________________________
> >>>> Cialug mailing list
> >>>> Cialug at cialug.org
> >>>> http://cialug.org/mailman/listinfo/cialug
> >>>>
> >>>>         
> >>>
> >>> -- 
> >>> Tony
> >>> Mike Myers - "My theory is that all of
> Scottish
> >>> cuisine is based on a dare."
> >>>
> _______________________________________________
> >>> Cialug mailing list
> >>> Cialug at cialug.org
> >>> http://cialug.org/mailman/listinfo/cialug
> >>>       
> >>       
> >> _______________________________________________
> >> Cialug mailing list
> >> Cialug at cialug.org
> >> http://cialug.org/mailman/listinfo/cialug
> >>     
> >
> >
> >       
> > _______________________________________________
> > Cialug mailing list
> > Cialug at cialug.org
> > http://cialug.org/mailman/listinfo/cialug
> >   
> 
> _______________________________________________
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