Static IP address without removing DHCP

Douglas Stanley douglas.m.stanley at gmail.com
Sun Oct 26 12:54:23 UTC 2014


On Oct 26, 2014 8:49 AM, "Dotan Cohen" <dotancohen at gmail.com> wrote:
>
> On Sun, Oct 26, 2014 at 2:41 PM, Douglas Stanley
> <douglas.m.stanley at gmail.com> wrote:
> > Don't forget to add the options:
> >
> > dns-nameservers
> > dns-search
> >
> > Otherwise you may not be able to resolve DNS.
> >
> > Doug
>
>
> Thank you! For some reason I seem to be using a loopback, but I don't
> see where the configuration outside is handled:
>
> $ cat /etc/resolv.conf
> # Dynamic resolv.conf(5) file for glibc resolver(3) generated by
resolvconf(8)
> #     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
> nameserver 127.0.1.1
> search Home
>
> $ dig gmail.com
>
> ; <<>> DiG 9.9.5-3-Ubuntu <<>> gmail.com
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 22197
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;gmail.com.                     IN      A
>
> ;; ANSWER SECTION:
> gmail.com.              181     IN      A       173.194.113.85
> gmail.com.              181     IN      A       173.194.113.86
>
> ;; Query time: 62 msec
> ;; SERVER: 127.0.1.1#53(127.0.1.1)
> ;; WHEN: Sun Oct 26 14:45:49 IST 2014
> ;; MSG SIZE  rcvd: 59
>
>
> Perhaps I am running a DNS server locally? I don't remember doing that
> but it is possible that I just forgot. I do see that I'm listening on
> port 53:
>
> $ netstat -ntulp | grep 53
> tcp        0      0 127.0.1.1:53            0.0.0.0:*
> LISTEN      -
> udp        0      0 127.0.1.1:53            0.0.0.0:*
>          -
> udp        0      0 0.0.0.0:5353            0.0.0.0:*
>          -
> udp6       0      0 :::5353                 :::*
>          -
>
>
>
> How should I go about diagnosing this? I would have assumed that my
> DNS would point to the same address as the default gateway as the
> router does do DNS.
>
Yes, so the default uses a local DNS server and puts your upstream DNS
server in the local DNS servers config. Does that make sense? I don't
remember where you can find what actual DNS server you got from dhcp, but
if you know the gateway does DNS resolving, just use that IP.

Doug

> --
> Dotan Cohen
>
> http://gibberish.co.il
> http://what-is-what.com
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