Re: Can't find the DNS Servers
On Tuesday 26 September 2017 14:42:39 David Wright wrote:
> On Mon 25 Sep 2017 at 18:41:33 (-0400), Gene Heskett wrote:
> > On Monday 25 September 2017 13:53:17 Greg Wooledge wrote:
> > > On Mon, Sep 25, 2017 at 07:32:05PM +0200, Pascal Hambourg wrote:
> > > > Le 25/09/2017 à 17:33, Gene Heskett a écrit :
> > > > > For me, its a root session, and a "chattr +i resolv.conf"
> > > >
> > > > Here we have a saying that roughly translates to :
> > > > "When you have a hammer, any problem looks like a nail."
> > >
> > > No. Seriously, just stop.
> > >
> > > Those of us who have done chattr +i on one or more systems have,
> > > in many cases, TRIED OTHER SOLUTIONS first and found them wanting.
> > >
> > > Take me for example.
> > >
> > > At work, I edited /etc/dhcp/dhclient.conf and removed the options
> > > that tell dhclient to ask for domain-name-servers (et al.). This
> > > works fine for me at work. The DHCP servers at work respect my
> > > wish not to be given a domain-name-server, so dhclient never
> > > touches resolv.conf and everyone is happy.
> > >
> > > Then I tried the same thing at home.
> > >
> > > The results were NOT the same.
> > >
> > > The Belkin plastic router at home sends me a domain-name-server
> > > even if I do not ask for one. And dhclient apparently overwrites
> > > resolv.conf every time it receives a domain-name-server from the
> > > DHCP server.
> > >
> > > EVEN IF IT DID NOT REQUEST ONE.
> > >
> > > So, the solution that I used at work does not work at home.
> > >
> > > You know what DOES work, though?
> > >
> > > chattr +i works.
> > >
> > > Do I prefer this solution? No.
> > >
> > > Would I be happier if I could use a more elegant solution? Yes.
> > >
> > > Should the dhclient program have a CONFIG FILE OPTION to say
> > > "NEVER TOUCH THE resolv.conf FILE"? YES!
> > >
> > > Does it? NO!
> > >
> > > Do I expect it ever to have one in the future? BWA-hahahaha! No.
> > >
> > > So we use what works, because the other choices don't fucking
> > > work.
> > >
> > > This is not about lack of creativity.
> > >
> > > It is not about being too blind or ignorant or stubborn to use the
> > > other solutions. ("Everything looks like a nail.")
> > >
> > > This is about the other soluttions NOT WORKING.
> > >
> > > It is about ISC being too blind or ignorant or stubborn to
> > > consider that many people run the DHCP client software WITHOUT
> > > being the ones in charge of the DHCP server on the same network.
> > >
> > > Or, not considering that many people use cheap plastic
> > > consumer-grade routers that don't behave the same way the ISC DHCP
> > > server behaves.
> > >
> > > Am I getting through yet?
> >
> > I am with Greg on this one. And I HAVE tried everything the man
> > pages tell me, and it does NOT work, so I do what DOES WORK.
> > Someday, maybe dhcpd will be smart enough to actually do what we
> > tell it to do.
> >
> > But that day hasn't even shown a cloud of dust on the time horizon I
> > can see from a 83 yo in <2 weeks viewpoint.
> >
> > Because all you so-called experts THINK it works ok the way it is,
> > we get badmouthed and called idiots. Bad dog, no biscuit, not even
> > the smell of one in an all static network situation.
>
> Well sometimes I wonder if we're using different tools, so I always
> treat your fixes with a great deal of salt. For example, I could
> bypass the partitioner in the Debian-installer, I couldn't make
> aptitude destroy my system by removing lots of packages without
> explicitly being told to, and I couldn't make # passwd demand
> the old password, to name a few examples.
>
> On this topic, I still can't understand the contents of your
> immutable /etc/resolv.conf file, even without the comma:
>
> nameserver 192.168.XX.1
> search host dns
"host" is a typu, s/b "hosts", which means it checks the /etc/hosts file
for the name you typed, and if not found there it queries the local dns
server at nameserver's address, which if its not in dd-wrt's name cache,
gets forwarded to my isp's dns servers. Takes about an extra 50ms to
resolve a name its not heard of in recent history. And 100% transparent
to me.
the dns is a synonym for nameserver, I have /etc/resolv.conf's using
both, and while the man page says a "space separated" list of sources, I
ran in my stupidity, resolv.conf's that had comma separated lists. Work
just fine for over 20 years. Keywords "search" and "order" seem also to
be interchangeable, and either is handled in the order given.
> domain coyote.den
This I think is a leftover from when it was the place to put your
domainname, but now we've had the domainname utility to set that for
what, a decade?, and I could probably remove that line. Belt and
suspenders I guess. :)
> Can you detail these domains called host and dns?
See inline above.
> Cheers,
> David.
Cheers David, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>
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