Using DNS server to stop local domains going through internet

Peter Silva peter at bsqt.homeip.net
Fri Jul 15 03:29:19 UTC 2016


dnsmasq is more than a simple cache... it's a 'do the right thing for
a small home environment thing'.  For example, to advertise local
services, just put them in /etc/hosts, and dnsmasq picks them up.  As
another example, as soon as you are finished setting up bind, you will
realize that it doesn't do dhcp, and you'll want to setup the isc-dhcp
server that matches.  dnsmasq does dhcp as well, kind of for free.

I don't get what problem you are solving, so it's hard to help.


If you really want to use bind9 and isc-dhcp-server and you want a
simple way to do it, I wrote this to make it less monotonous:

https://github.com/petersilva/si46ib9d

It does both bind and dhcp server configs for IPv4 and IPv6 for a
typical home setup (with split-horizon.) just did it to automate my
maintenance at home, as normally you have to enter hostnames and
addresses three or four times for the ISC tools.



On Thu, Jul 14, 2016 at 7:12 PM, Ben Edwards <list4me2 at gmail.com> wrote:
> Ok, thanks for relying.
>
> I don't think its the DNS lookup that is sowing things down, I think it is
> the fact that all the traffic is routed through the net rather than locally
> that is causing the problem.  So a simple DNS cache is not going to solve
> the problem.
>
> I have actually set up a DNS server (bind) and got it working, that was
> fun;)....well almost;(.
>
> I have the basic thing working, just cant do the funky stuff to get
> prsc.noip.me to resolve to the local server rather than the DyDNS service.
>
> The zone (db.prsc.noip.me) I am trying to do it with looks like this.
>
> $TTL            604800
> @               IN      SOA     pluto.prsc.localhost. pi.localhost. (
>                                       2         ; Serial
>                                  604800         ; Refresh
>                                   86400         ; Retry
>                                 2419200         ; Expire
>                                  604800 )       ; Negative Cache TTL
> ;
> @               IN      NS      pluto.prsc.localhost.
> @               IN      A       127.0.0.1
> @               IN      AAAA    ::1
>
> ; Beow are the A record addresses
>
> prsc                    IN      A       192.168.0.50
>
> ; Below are the CNAME record addresses (aliuses) - point ot the A records
>
> oCserver        IN      CNAME   prsc.noip.me.
>
> But I get an unknown host error when I try to ping prsc.noip.me.
>
> Ben
>
>
> On 14 July 2016 at 13:10, Peter Silva <peter at bsqt.homeip.net> wrote:
>>
>> dnsbind is probably more what you want for this.
>>
>> https://help.ubuntu.com/community/Dnsmasq
>>
>> bind9 is a real pain to set up properly... if you have a need to run a
>> full DNS server and, say advertise maps to servers in the cloud, or
>> you just want to know how to do it, all fine.  If you just want your
>> DNS to be fast and local, dnsmasq is a lot easier to setup, and does
>> the job with less work.
>>
>>
>> On Wed, Jul 13, 2016 at 7:55 PM, Ben Edwards <list4me2 at gmail.com> wrote:
>> > Cople of things I forgot to mention. Firstly the DNS is the same server
>> > as
>> > owncloud.  also is there anything else I need to setup in bind9?
>> >
>> > On 14 July 2016 at 00:37, Ben Edwards <list4me2 at gmail.com> wrote:
>> >>
>> >> Hi, first thing I should say is I have never setup a DNS and am quite
>> >> nervous about breaking our network;).
>> >>
>> >> So, we use owncloud and I want to use a DYDNS domain rather than the
>> >> local
>> >> IP address of the owncloud server (for a cople of reasons but mainly so
>> >> I
>> >> can set it up on laptops which may be outside the local network).
>> >> Problem
>> >> is if I do this the performance is very bad as it goes throuht the
>> >> internet.
>> >> A bit of digging reviles the way to do this is to setup a DNS server
>> >> and
>> >> forward all requests to the upstream server (probably going to have to
>> >> use
>> >> the google public ones) unless it is the domain of our owncloud server,
>> >> in
>> >> which case we resolve the domain as the owncloud servers local IP.  Or
>> >> that's what I think I need to do.
>> >>
>> >> I am using Ubuntu 15.10.
>> >>
>> >> I think I need to install bind9 (apt-install bind9 dnsutils).
>> >>
>> >> in /etc/bind/named.conf.options add
>> >>
>> >> forwarders {
>> >>   8.8.8.8;
>> >>   8.8.4.4;
>> >> };
>> >>
>> >> Then to bind prsc.noip.me to 192.168.42.10 (the owncloud server do I
>> >> simply put
>> >>
>> >> 192.168.42.10           prsc.noip.me
>> >>
>> >> In /etc/hostname
>> >>
>> >> Well thats my guess, or how do I do it?
>> >>
>> >> Ben
>> >> --
>> >> Ben Edwards, Video Editor and Cameraman
>> >> web:www.nkytwig.com mobile:07773 02 44 82 skype:funkytwig
>> >> twitter:@funkytwig
>> >> iContact Community Video | Bristol Community Channel
>> >
>> >
>> >
>> >
>> > --
>> > Ben Edwards, Video Editor and Cameraman
>> > web:www.nkytwig.com mobile:07773 02 44 82 skype:funkytwig
>> > twitter:@funkytwig
>> > iContact Community Video | Bristol Community Channel
>> >
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>
>
>
> --
> Ben Edwards, Video Editor and Cameraman
> web:www.nkytwig.com mobile:07773 02 44 82 skype:funkytwig twitter:@funkytwig
> iContact Community Video | Bristol Community Channel
>
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