Your questions stumped me at first... but I think I understand why now. DNS delegates control of domain names, not of IP addresses. The records maintained by any DNS server are thus organized by domain _name_, and the ip addresses referenced are for various hosts involved in those named domains. That is, you are specifying thing like "for this host within this named domain, here is the IP address", "when this domain name is used in a context that ought to reference a host, really this means this real host name", and "when looking for the server that handles email for this domain, talk to the servers one of these ip addresses". It even, through use of the IN-ADDR.ARPA. domain name, allows one to look up what the host name is for an ip address.
What you seem to be assuming is that there is some correspondence between ip networks (192.168.1.128/25 for example) and dns network names. There is not, unless you make it so. All ip addresses in DNS are ip addresses of hosts, and they may take on any value that makes sense for that logical network to function. Actually, the reverse lookup conventions do involve ip networks, but they are really network names. See http://www.ietf.cnri.reston.va.us/rfc/rfc2317.txt. This means that the reverse lookup on an ip address may not always yield the same hostname that was used to obtain the ip address in the first place. However, this situation is very common in virtual hosting by ISPs (myweb.mydomain.com -> xxx.xxx.xxx.xxx -> www.myisp.net). On 9 Jul 2003, Charles Holbrook wrote: > ALSO: > > Can you bind multiple internal domains to the same Class C of IP > addresses? > > On Wed, 2003-07-09 at 11:09, Charles Holbrook wrote: > > In section 3.6 of the instruction manual it talks about Declaring > > private domain(s). I have a private domain that stretches across three > > different internal class Cs. Can I list the same domain multiple times? > > > > hi-privacy.net > > 1.168.192.in-addr.arpa > > hi-privacy.net > > 10.168.192.in-addr.arpa > > hi-privacy.net > > 20.168.192.in-addr.arpa There is no association between successive lines in the DOMAINS file. This simply declares that this service is authoritative for these domain names. Eliminate the duplicated "hi-privacy.net" lines. --------------------------------------------------------------------------- Jeff Newmiller The ..... ..... Go Live... DCN:<[EMAIL PROTECTED]> Basics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/Batteries O.O#. #.O#. with /Software/Embedded Controllers) .OO#. .OO#. rocks...2k --------------------------------------------------------------------------- ------------------------------------------------------- This SF.Net email sponsored by: Parasoft Error proof Web apps, automate testing & more. Download & eval WebKing and get a free book. www.parasoft.com/bulletproofapps ------------------------------------------------------------------------ leaf-user mailing list: [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/leaf-user SR FAQ: http://leaf-project.org/pub/doc/docmanager/docid_1891.html
