Can I use bind9 to resolve only ONE hostname in a zone?

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Can I use bind9 to resolve only ONE hostname in a zone?

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04-21-2010

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Can I use bind9 to resolve only ONE hostname in a zone?

Hi there,

I have the following problem.
I have a Debian server with bind9.
I can also use my ISP DNS server through the internet box (192.168.1.1).

I would like to fool my client workstation to a local machine when they query for one specific hostname within a domain.
I want to let the ISP DNS do the job for any other request.

For example:

If they query mail.google.com, I want to point that to 192.168.1.40.
If they query anything else in google.com, I want to let 192.168.1.1 do the resolution.
If they query anything else in any other domain, I want to let 192.168.1.1 do the resolution.

So far I setup bind9 on my Debian server.
I created a zone for google.com and I successfully redirected mail.google.com to 192.168.1.40.
But how can instruct bind9 to transmit any other request to the next DNS (192.168.1.1)?

Thanks for your help.

koko

edit by bakunin: removed a typo in the thread title to make it easier to search for it in the archives.

Last edited by bakunin; 04-22-2010 at 08:30 AM..

kokonut95

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04-21-2010

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Create a A record just like google.com to *.google.com now all subdomains also point to same IP.

chakrapani

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04-21-2010

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Thanks chakrapani for your post.
I think we're not talking about the same thing.
I do NOT want all query *.google.com to go to my local machine (192.168.1.40).
I want exclusively mail.google.com to go to my local machine and ALL the rest to go wherever the ISP's DNS says to.

kokonut95

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04-22-2010

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I guess I got the question wrong... Could you please confirm if you were looking for this

DNS Spoofing

and you want for only one sub-domain not all the domain.

chakrapani

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04-22-2010

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Exactly!
Now I know that what I'm trying to do is spoofing.
Don't worry, I'm not trying to attack anyone. Here is the deal:

We have a Debian ProFTPd server.
Its local address is 192.168.1.254.
Its WAN address is something like 1.2.3.4 (the company's internet box).
We also have a website hosted at 5.6.7.8 (web hosting provider).

We own mydomain.com and manage it with gandi.net.
The address ftp.mydomain.com points to 1.2.3.4.
The address www.mydomain.com points to 5.6.7.8.

We all have laptops and work both inside and outside the office.
We all have a backup program configured to send files to ftp.mydomain.com.
I would like to configure spoofing in our local network so the address ftp.mydomain.com (and exclusively this one) is resolved to 192.168.1.254. Whatever other name should be resolved according to worlwide DNS servers.

How can I do that?
I already configured a Debian bind9 server in the local network. Is that the answer? What should I write in the zone file?
Is there another solution? Which one?

Thanks for your help

kokonut95

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04-22-2010

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Good spoofing OK

BAD spoofing -- Grrrr ...

chakrapani

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