Maintained by: NLnet Labs

[Unbound-users] Unbound and Bind Views

Ondřej Surý
Mon Oct 25 15:32:44 CEST 2010


Hi Bruce,

it should be fairly easy to accomplish both option using DNAT on linux
(or using other translation mechanisms either on the router or on the
end box).

f.e. on linux you can use:

- 10.10.10.1 is the normal address
- 10.10.10.2 is extra address you use to serve internal clients (can
be localhost if NATed on the box)
- 192.168.1.1/32 is the specific CIDR

iptables -t nat -A PREROUTING -s 192.168.1.1/32 -d 10.10.10.1 -j DNAT
--to-destination 10.10.14.2

If you do the NAT on the router before, it has the added benefit of
splitting the load (so you can provide less loaded service to your
customers... etc.)

Ondrej

On Mon, Oct 25, 2010 at 15:18, Hayward, Bruce
<Bruce.Hayward at mtsallstream.com> wrote:
> Hey
>
> On specific resolvers we use bind views to direct those who come from an IP in a specific CIDR to use a specific zone.  We have two cases of these views.
>
> We also use views to isolate those that should only use internal zones versus those that should not use internal zones (external customers)
>
> Those that do not come from an IP in a specific CIDR use a global zone.
>
> "Views" were introduced in Bind 9.
>
> http://oreilly.com/pub/a/oreilly/networking/news/views_0501.html
>
> Bruce
>
> Bruce Hayward, MTS Allstream Inc., (p) 204-958-1983 (e) bruce.hayward at mtsallstream.com
>
>
> -----Original Message-----
> From: unbound-users-bounces at NLnetLabs.nl [mailto:unbound-users-bounces at NLnetLabs.nl] On Behalf Of Ondrej Surý
> Sent: October 21, 2010 9:52 AM
> To: unbound-users at unbound.net
> Subject: Re: [Unbound-users] Unbound and Bind Views
>
> Hey Bruce,
>
> I think that it's pretty well documented in the mail you sent a
> link...  you setup two unbound instances and mangle the traffic from
> set of ip addresses using standard firewall/nat features your
> operating system has.
>
> Anyway maybe if you can explain what you are trying to accomplish then
> we can propose alternative without views.
>
> Ondrej
>
> On Thu, Oct 21, 2010 at 15:32, Hayward, Bruce
> <Bruce.Hayward at mtsallstream.com> wrote:
>>
>> One area of Bind that we use is views to direct traffic.
>>
>> Before we can switch to Unbound, we would need a means of emulating
>> views.
>>
>> In researching this (on Google) I came across a thread discussing this:
>> http://www.mail-archive.com/unbound-users@unbound.net/msg00337.html
>>
>> Has anyone documented steps to accomplish this?
>>
>> Thanks
>>
>> Bruce
>>
>> Bruce Hayward, MTS Allstream Inc., (p) 204-958-1983 (e)
>> bruce.hayward at mtsallstream.com
>>
>>
>>
>>
>> Is it really necessary to print this email?
>>
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>>
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>
>
>
> --
> Ondřej Surý <ondrej at sury.org>
>
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-- 
Ondřej Surý <ondrej at sury.org>