Re: [gentoo-user] Something went wrong with DNS, plz help!

[Peter Humphrey <peter@prh.myzen.co.uk>]

On Saturday 26 July 2014 22:16:53 Grand Duet wrote:
> 2014-07-26 21:19 GMT+03:00 Alan McKinnon <alan.mckinnon@gmail.com>:
> > On 26/07/2014 18:16, Grand Duet wrote:
> >> 2014-07-26 19:02 GMT+03:00 Alan McKinnon <alan.mckinnon@gmail.com>:
> >>> On 26/07/2014 17:23, Grand Duet wrote:
> >>>> The first reboot after recent update of the system have
> >>>> shown that I cannot open any webpage in Firefox.
> >>>> 
> >>>> More exactly, Firefox or my system cannot any more resolve
> >>>> URL to IP address (sorry if I use wrong terms).
> >>>> 
> >>>> Thus,
> >>>> 
> >>>>    host gmail.com <http://gmail.com>
> >>>> 
> >>>> gives:
> >>>>    ;; connection timed out no servers could be reached
> >>>> 
> >>>> Nevertheless
> >>>> 
> >>>>     dig @8.8.8.8 <http://8.8.8.8> gmail.com <http://gmail.com>
> >>>> 
> >>>> reports the corresponding IP adresses.
> >>>> 
> >>>> I have not changed any my network settings and my
> >>>> /etc/conf.d/net file still contains list of my DNS servers
> >>>> that contains server 8.8.8.8 as well but somehow it is
> >>>> not enough any more. :(
> >>>> 
> >>>> During my last system update, I suddenly found that
> >>>> I had to update about 150 packages, what was a little
> >>>> bit strange as I update my system at least once a week.
> >>>> 
> >>>> I have attributed that to the remnants of gnome2 (now I am using
> >>>> fxce4) that I have not cleaned completely and that is now going
> >>>> to update. So, I deviated a bit from my usual system update routine
> >>>> trying to fix that. Nevertheless, as to my view, during my system
> >>>> update
> >>>> I did nothing to distroy the DNS lookup.
> >>>> 
> >>>> Luckily, I save my system update logs and now can attach
> >>>> the last one to this e-mail.
> >>>> 
> >>>> Please, help me to recover my internet access,
> >>>> as I still have to do a lot of real work till Monday
> >>>> and have not enough time to investigate this problem
> >>>> alone and without a proper internet access. :(
> >>> 
> >>> what is the contents of /etc/resolve.conf?
> >>> 
> >>    # Generated by net-scripts for interface lo
> >>    domain mynetwork

That isn't right. It should say it's for interface eth0. At first I thought 
eth0 wasn't being brought up, but then you quoted replies from dig, so it must 
be.

> >> That is all.
> >> 
> >> I tried to add here lines like:
> >>   nameserver 8.8.8.8
> >> 
> >> but found out that this file is rewritten on every reboot.
> >> 
> >> My net try was to create /etc/resolv.conf.tail file
> >> and put that line there but that did not help either.
> > 
> > Then the problem is obvious - you have no nameserver entries as you
> > don't create any. The computer can't make them up by magic...
> 
> But it did it just before the last update: it created DNS entries in
> /etc/resolv.conf
> from my /etc/conf.d/net file on every reboot. And now it "cannot do this
> magic"?
> > You need to create static nameserver entries because you use a static
> > (i.e. no dhcp) configuration. Add them to /etc/resolvconf.conf
> 
> It does not help as /etc/resolv.conf is overwritten on every reboot.
> 
> > If it still gets removed across restarts
> 
> Yes, it does.

Do you still have netifrc installed? Maybe it got lost in all that updating 
work. Try emerging it again anyway.

Do your 90-network-rules look like mine?

$ cat /lib/udev/rules.d/90-network.rules
# do not edit this file, it will be overwritten on update

# /etc/udev/rules/90-network.rules:  triggering network init-scripts

# Activate our network if we can
SUBSYSTEM=="net", ACTION=="add",    RUN+="net.sh %k start"
SUBSYSTEM=="net", ACTION=="remove", RUN+="net.sh %k stop"

I'm clutching at straws here, and I hear others doing the same  ;-(

-- 
Regards
Peter