strange problems with Internet connection

Tod Merley todbot88 at
Sun Apr 16 08:31:49 UTC 2006

On 4/15/06, Lutzer <M.Lutzer at> wrote:
> Tod,
> Tod Merley schrieb:
> > below V
> >          V
> >
> > On 4/15/06, *Lutzer* <M.Lutzer at <mailto:M.Lutzer at>> wrote:
> >
> >     Unfortunately after some more testing I experienced the problem
> several
> >     times again. I disabled IPv6 in Firefox and systemwide (as described
> by
> >     Thilo) which did not helped to get rid of the problem. Probably IPv6
> is
> >     not the reason. Some more ideas how to fix it?
> >
> > Hi Again Lutzer,
> >
> > The problem is not IPv6 which you may well need to access some of the
> > resources used by many applications but rather your modem's reponse to
> > IPv6 Domain Name Service (DNS) queries.  Every time you boot in or
> > likely every time you sign in DHCP will re-write /etc/resolv.conf with
> > your modem (probably at IP address <>) as
> > the first nameserver to go to.
> >
> > Best solution: Upgrade the modems firmware.  Look at it's manufacturer's
> > web page for the update info or contact your internet provider if they
> > own and support it.
> Unfortunately my DSL-Router (which includes the modem) is up to date.
> > Second best solution: By whatever means see that the modem's DNS server
> > is not used.
> >
> > Possible addition to the second solution, set up a DNS server within
> > your own box and use it as your primary name server.
> A local DNS would be faster but probably a quick solution would be to
> use a public DNS. (Any suggestions for a fast and reliable one?) How can
> I add a DNS to resolv.conf so that it is not overwritten while using DHCP?
> Thanks alot!
> Lutzer
> > I hope this helps!
> >
> > Tod
> >
> > -- google is our friend! --
> >
> --
> ubuntu-users mailing list
> ubuntu-users at
HI again Lutzer!

Probably it would work (and be worth my learning and doing) to add an
editing script to the last section of the initialization process during
boot.  This should hold since the DHCP lease should be renewed if the
machine is on, and will handle any change if it is rebooted or turned
off/on.  My basic idea is to use sed to parse and edit resolv.conf keying on
the modem's IP.  My guess is that it will go into  the /etc/rcS.d directorey
with a very high "s" number.  I have done little of this sort of thing.
Lots of reading if by this method.

Before I do that I suppose I should look at "man dhclient" and "man
dhclient.conf" and see if there is a way to control dhclient's use of

The bad news is that I have other projects, and Monday I start a project
which will consume most of my time for about eleven days.  I may not have it
for a couple of weeks to share and frankly it would be good to write on this
again if you still need it since I tend to get distracted.

May God Help Us!

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