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Old 08-12-2009, 12:10 PM   #1
orthogonal3
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Registered: Jun 2009
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Question Override real DNS entries with BIND (Centos 5.3)


Hi All,

I'm guessing there has to be a resonable way to solve my issue but I'm trying to get some advice on a best practice to implement.

The situation is this:

I have recently moved to a Web Design company and we need to be able to spoof DNS entries for websites we're working on.

I have an internal BIND DNS server (9.3.4-P1) and currently I have created a zone to spoof entries like this:

For this client say "ABCD" with domain "ABCD.com"
I have created a BIND DNS zone "ABCD.com." with one CNAME alias entry for "www" pointing to our demo server "demo.XYZ.net". The only other entry I think is an NS.

At this point I want to say that this works out fine.
If you browse to "www.ABCD.com" you get the demo website and it works cool.

Now a young SEO consultant likes to try my patience with just entering the domain, less the www. part and it doesn't work as it doesn't match any records. He just gets the current external live site.

I told him to put the www. in and he tells me well it shouldn't make a difference, and that we should have canonical mapping so it still resolves.

Now I'll be honest and I can't figure out how to put in a record into the zone without it being prepended to the domain name.

e.g. "test" would become "test.ABCD.com"

So how do I make a record for just "ABCD.com"???
So "ABCD.com" will go to my demo "ABCD.com" server.

This made me think a bit because, due to the nature of our business this is going to happen a lot, where I'll be asked to turn the spoof on and off many times each day.

So, what is the best way to add/manage these records?

Would I need another instance of BIND? (Not really an issue if I do!)

Can I add a zone from "." so I can spoof anything / any address without blowing up BIND because there is no hints zone file listed?

If I can just add a set of overrides in one file so I can switch them on and off using a web front end I might plug up in PHP?

There will be no restrictions to what domains I'll need to spoof it could be anything for any TLD.

Thanks all for your ongoing wisdom,

Phil
 
Old 08-12-2009, 01:05 PM   #2
bathory
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You can just add another CNAME to demo.XYZ.net or better use its IP. So either of the following should work:
Quote:
ABCD.com. IN A <demo.XYZ.net-IP>
ABCD.com. CNAME demo.XYZ.net.
 
Old 08-14-2009, 04:42 AM   #3
orthogonal3
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Registered: Jun 2009
Location: Manchester, UK
Distribution: Ubuntu
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Wink Seems to work...

Quote:
Originally Posted by bathory View Post
You can just add another CNAME to demo.XYZ.net or better use its IP. So either of the following should work:
Thanks bathory.

I put an A record in.
Seems to have some decent results, a few oddities though.
I just clear down the squid cache and that tends to make it look good.

It turns out it was Webmin throwing errors in its input checks not the DNS server itself. I like webmin, first use after inheriting it here, but at times its back to the ol' dirty config files.

Cheers
 
  


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