override one hostname

[Chris Buxton]

Create a zone named "mail.example.org". You can then put whatever  
address you want into it. The zone might be as simple as:

@  soa  ns hostmaster.toltech.nl. 2008022800 8h 15m 2w 1h
    ns   ns
    a    192.168.0.1
ns a    192.168.0.2

The address of "ns.mail.example.org" is the address of your resolving  
(caching) name server. The address above that is the internal address  
of your mail server.

BTW: This does in fact constitute split DNS. It's just very selective.

Chris Buxton
Professional Services
Men & Mice
Address: Noatun 17, IS-105, Reykjavik, Iceland
Phone:   +354 412 1500
Email:   cbuxton at menandmice.com
www.menandmice.com

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On Feb 28, 2008, at 4:22 AM, Krzysztof Chojnowski wrote:

> Hello,
>
> we encountered problem with NAT as described in:
> http://www.openbsd.org/faq/pf/rdr.html#reflect . In short: there is a
> LAN and a firewall that is forwarding external connections to machines
> inside our LAN. We have some services (eg. SMTP) that should be
> accessible the same way (using the same hostname - mail.example.org)
> from inside and outside our LAN. Our firewall fails to redirect  
> packets
> from LAN that are addressed to its external IP.
> We can't use "split" functionality  as name server for example.org is
> located outside and BIND running in our LAN is used only for cache and
> local queries.
> My idea was to somehow override just the "mail.example.org" hostname  
> on
> our internal BIND. All other queries for example.org should be  
> forwarded
> to corresponding NS.
> Is it possible with BIND? How can we do this? Thanks in advance for  
> any
> help.
>
> greetings
> Notch
>
>