topic Re: DNS question in Operating System - Linux

DNS question

Jano_1 — Fri, 29 Oct 2004 15:49:22 GMT

Hi.

I have a DNS server resolving my domain to valid IP addresses so I can receive mail etc.
eg. mydomain.com -> 100.10.20.30

Is it possible to use the same server to resolve my domain also to invalid local addresses?
eg. mydomain.com -> 192.168.30.30

So when I ping from outside the network it will resolve
myserver.mydomain.com to 100.10.20.30
but from inside the network it will resolve
myserver.mydomain.com to 192.168.30.30

Regards.
Jano

Re: DNS question

Lee Hundley — Fri, 29 Oct 2004 16:30:30 GMT

Yes, this is possible. You will need to use Bind v9, and maintain 2 separate zone files for the inside and outside.Additionally, you will need a way to distinguish which clients have access to which zone file via an IP range.To utilize this, you will need to configure bind to use DNS "Views". An example of implementing DNS views can be found here:
http://www.zytrax.com/books/dns/ch7/view.html

If Bind9 isn't an option, you could always run 2 seperate instances of bind by using the 'listen-on' directive, coupled with seperate zone files as well. This is also assuming you have 2 IP addresses on the DNS server.

Re: DNS question

Steven E. Protter — Sun, 31 Oct 2004 01:43:33 GMT

You set up a seperate DNS database for local machines. I call mine local.dns and I put it in the /etc/named.conf file.

Then I point local machines to the inside DNS server and they get the local resolution for the internal server.

SEP