CentOS - Sep 2010 - Configuring BIND to answer to two domain names (four IP addresses)

On a CentOS 5 server, I am having a hard time configuring BIND to
answer to 4 IP addresses for 2 domain names.

Currently, I have four IP addresses, for sake of discussion they are:
1.1.1.1
1.1.1.2
1.1.1.3
1.1.1.4

Additionally, I have two domain names. For sake of discussion:
exampleA.com
exampleB.com

My goal is to have 1.1.1.1 & 1.1.1.2 as the nameservers for
exampleA.com, and 1.1.1.3 & 1.1.1.4 as the nameservers for
exampleB.com. Apache is running on this machine, and should of course
serve pages for the sites.

I think that I've got the apache configuration down, but the BIND
configuration is eluding me. I've read the following fine manual, but
I am still stuck:
http://www.centos.org/docs/5/html/Deployment_Guide-en-US/ch-bind.html

Additionally, I have googled for "how to configure bind for multiple
domain names" and the like, but I see no mention of the IP addresses
configuration. Can I simply configure any IP address that the server
answers to as the nameservers? What am I missing?

Thank you in advance!

-- 
Dotan Cohen

http://gibberish.co.il
http://what-is-what.com

----- Original Message -----
| On a CentOS 5 server, I am having a hard time configuring BIND to
| answer to 4 IP addresses for 2 domain names.
| 
| Currently, I have four IP addresses, for sake of discussion they are:
| 1.1.1.1
| 1.1.1.2
| 1.1.1.3
| 1.1.1.4
| 
| Additionally, I have two domain names. For sake of discussion:
| exampleA.com
| exampleB.com
| 
| My goal is to have 1.1.1.1 & 1.1.1.2 as the nameservers for
| exampleA.com, and 1.1.1.3 & 1.1.1.4 as the nameservers for
| exampleB.com. Apache is running on this machine, and should of course
| serve pages for the sites.
| 
| I think that I've got the apache configuration down, but the BIND
| configuration is eluding me. I've read the following fine manual, but
| I am still stuck:
| http://www.centos.org/docs/5/html/Deployment_Guide-en-US/ch-bind.html
| 
| Additionally, I have googled for "how to configure bind for multiple
| domain names" and the like, but I see no mention of the IP addresses
| configuration. Can I simply configure any IP address that the server
| answers to as the nameservers? What am I missing?
| 
| Thank you in advance!
| 
| --
| Dotan Cohen
| 
| http://gibberish.co.il
| http://what-is-what.com
| _______________________________________________
| CentOS mailing list
| CentOS at centos.org
| http://lists.centos.org/mailman/listinfo/centos

Have a read for the listen on directive for BIND which tells BIND what
interfaces/IP Addresses to bind to.  Alternatively, you could just configure
BIND identically on both machines and ensure that they are setup in a
master/slave configuration so that each name server could answer requests for
both domains and publish both name server records in each domain.

--
James A. Peltier
Systems Analyst (FASNet), VIVARIUM Technical Director
Simon Fraser University - Burnaby Campus
Phone   : 778-782-6573
Fax     : 778-782-3045
E-Mail  : jpeltier at sfu.ca
Website : http://www.fas.sfu.ca | http://vivarium.cs.sfu.ca
MSN     : subatomic_spam at hotmail.com

Does your OS has a man 8 lart?
http://www.xinu.nl/unix/humour/asr-manpages/lart.html

I think you should be able to do this using BIND views with
match-destinations. Have one view match destinations for 1.1.1.1 and
1.1.1.2 and the other for 1.1.1.3 and 1.1.1.4. Create a zone in one
view for exampleA.com and one in the other for exampleB.com

Ryan

On Fri, Sep 24, 2010 at 1:08 PM, Dotan Cohen <dotancohen at gmail.com>
wrote:
> On a CentOS 5 server, I am having a hard time configuring BIND to
> answer to 4 IP addresses for 2 domain names.
>
> Currently, I have four IP addresses, for sake of discussion they are:
> 1.1.1.1
> 1.1.1.2
> 1.1.1.3
> 1.1.1.4
>
> Additionally, I have two domain names. For sake of discussion:
> exampleA.com
> exampleB.com
>
> My goal is to have 1.1.1.1 & 1.1.1.2 as the nameservers for
> exampleA.com, and 1.1.1.3 & 1.1.1.4 as the nameservers for
> exampleB.com. Apache is running on this machine, and should of course
> serve pages for the sites.
>
> I think that I've got the apache configuration down, but the BIND
> configuration is eluding me. I've read the following fine manual, but
> I am still stuck:
> http://www.centos.org/docs/5/html/Deployment_Guide-en-US/ch-bind.html
>
> Additionally, I have googled for "how to configure bind for multiple
> domain names" and the like, but I see no mention of the IP addresses
> configuration. Can I simply configure any IP address that the server
> answers to as the nameservers? What am I missing?
>
> Thank you in advance!
>
> --
> Dotan Cohen
>
> http://gibberish.co.il
> http://what-is-what.com
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
>

On Mon, Sep 27, 2010 at 13:27, Brent L. Bates <blbates at vigyan.com>
wrote:
> ? ? Just noticed something. ?Have your serial number reflect the date you
> last updated the file. ?That way you will know when you last changed it.
?For
> example, today is September 27, 2010, if you were making your first update
> today, make the serial number 2010092701. ?I add on 2 digits at the end in
> case I need to make more than one change in one day. ?Changing it 10 times
in
> one day isn't likely, but just in case that isn't enough, I know
*I* will not
> be making more than 100 changes in one day. ?Serial numbers ALWAYS have to
> increase with each change. ?That is the way other name servers know they
need
> to update their information. ?If the serial number is bigger than what they
> have stored, then they know they need to download the new information. ?If
you
> plan on updating the DNS information more than 100 times a day, you will
need
> to give yourself some extra digits. ?I hope this is of some help.
>
I think that the fine manual mentioned something about if one hundreds
edits were done in a single day, then it is time to go home and get
some sleep!

-- 
Dotan Cohen

http://gibberish.co.il
http://what-is-what.com