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- Path: sparky!uunet!noc.near.net!nic.near.net!not-for-mail
- From: jcurran@nic.near.net (John Curran)
- Newsgroups: comp.protocols.tcp-ip.domains
- Subject: Re: nameserver resolution by adress (HELP!!!)
- Date: 11 Sep 1992 00:33:19 -0400
- Organization: New England Academic And Research Network
- Lines: 32
- Distribution: inet
- Message-ID: <18p7ifINNmkq@nic.near.net>
- References: <1992Sep10.224353.28058@mintaka.lcs.mit.edu>
- NNTP-Posting-Host: nic.near.net
-
- In article <1992Sep10.224353.28058@mintaka.lcs.mit.edu> feoh@hal.gnu.ai.mit.edu (Chris Patti) writes:
- >We have a nameserver for a subdomain, and the nameserver one level
- >above us knows enough about us to be able to correctly resolve names,
- >but not addresses. (i.e. the server above us has an NS record with
- >our nameserver listed to resolve all names with our domain postfix).
- >Does anyone happen to know the syntax necessary to make the
- >nameserver above us send ADDRESS requests to our nameserver as well?
- >(A gethostbyname on a foreign host is successful, but then taking
- >that addr and trying to gethostbyaddr is NOT successful.)
-
- Your delegation of ncm.interlan.com is fine (although I'd get a secondary
- nameserver running real soon now...)
-
- Since address-to-name queries are looked up a different DNS zone
- (204.130.in-addr.arpa), these queries are not "automatically" forwarded
- to your new nameserver. Such queries will be answered by a current
- nameserver for 204.130.in-addr.arpa whose primary DNS server is interlan.com.
- If you insert the appropriate PTR record on that system, the address-to-name
- lookup should work fine.
-
- What? You want to delegate administration of those PTR records as well?
- This may be possible, depending on your circumstances. DNS allows delegation
- of authority on "." boundaries. For example, it is technically simple to
- have the authority for 35.204.130 delegated to ncm, and configure ncm for that
- zone with PTR records. Whether or not this is feasible depends on the
- administration of the 204.130.in-addr.arpa domain and the probability of
- a host "outside" of your authority ending up with a 130.204.35.xx address.
-
- That's a real brief overview. Post any unanswered questions, or contact
- your network service provider for specifics.
-
- /John
-