Re: [cobalt-users] Multiple DNS

["Rodolfo J. Paiz" <rpaiz@xxxxxxxxxxxxxx>]

At 4/28/01 01:16 AM -0400, you wrote:
> If I want to host two different *name server* sets on my RaQ, how
> would I go about doing it?
> Example:
> I want the RaQ to answer as the name server for all of these:
> ns1.greatsite.com
> ns2.greatsite.com
> ns1.anothersite.com
> ns2.anothersite.com

Sorry to get to the party so late, but after seeing the thread I think 
you're making your life too complicated. What you want to do is (good news) 
a piece of cake.

> The machine is already set up as  www.greatsite.com (this is not the
> real addy, obviously). So it's going to answer for
> ns1/ns2.greatsite.com. What I need to do is get it to *also* answer to
> ns1/ns2.anothersite.com.

So add (ns1.anothersite.com->your.first.ip.address) and 
(ns2.anothersite.com->your.second.ip.address) to your actual instance of 
BIND, and you're done.

Why? You're starting off from the wrong premise here as in "answer for..." 
some name or other. You already know that you can point multiple A records 
to one machine; well, NS records are no different. I now have 40 domains on 
my server, and *all* domains have NS records that look like this:

ns1.site001.com 111.111.111.111
ns2.site001.com 111.111.111.112

ns1.site002.com 111.111.111.111
ns2.site002.com 111.111.111.112

and so on. What matters is that DNS resolves *one-way*. So you setup BIND 
to listen on *two* IP addresses (please don't run two instances of BIND, 
it's totally unnecessary), and you feed it all the right information, and 
things will work.

> I am thinking I need to do one of two things:
> 1. Add ns1.anothersite.com and ns2.anothersite.com as virtual sites,
> each with their own IP address. Or...
> 2. Add ns1.anothersite.com and ns2.anothersite.com as virtual sites,
> with the same IP addy as the main machine. And then cross my fingers.

Neither. Make sure your machine listens on both the IP addresses you want 
to use, than tell BIND to listen on both addresses, and then configure 
everything normally in that BIND.

> I did a search through the archives but couldn't find anything on
> having multiple DNS - just on having multiple sites. Which is *not*
> what I'm looking for.

Because you shouldn't be looking for it... :-)

I'm reading less list traffic now (for instance, I haven't even read the 
ipchains thread on this list), but let me know if you have any problems 
(sending mail to my list address rpaiz@xxxxxxxxxxxxxx and copying the list 
is a good way to get my attention, then I'll respond on-list).

Also, Carrie, I suggest you create a junk domain for yourself (anything... 
carriesplace.com is good) and play with that when trying new things. It 
really helps, as an additional tool for testing and debugging, and it costs 
very little.


--
Rodolfo J. Paiz
rpaiz@xxxxxxxxxxxxxx