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- From: per@erix.ericsson.se (Per Hedeland)
- Subject: Re: problem with named/resolve
- Message-ID: <1992Dec13.191756.12072@eua.ericsson.se>
- Keywords: named, DNS, resolver
- Sender: news@eua.ericsson.se
- Nntp-Posting-Host: super.eua.ericsson.se
- Nntp-Posting-User: per
- Organization: Ellemtel Telecom Systems Labs, Stockholm, Sweden
- References: <1ga7e4INNeaf@fnnews.fnal.gov>
- Date: Sun, 13 Dec 1992 19:17:56 GMT
- Lines: 32
-
- In article <1ga7e4INNeaf@fnnews.fnal.gov> schurech@nightcrawler.fnal.gov (kurt schurecht) writes:
- > When I run nslookup on machine A I get a response:
- >
- >*** Can't find server name for address 131.225.22.66: No information
- >
- >where the IP address is that of machine FIRE.
-
- This is a misfeature of pre-BIND-4.8.3 nslookup - it is *only* a problem
- with nslookup, normal lookups by telnet/ftp/whatever don't have it. What
- happens is that when nslookup contacts the server specified in
- /etc/resolv.conf, it wants to find out the name of the server host
- (/etc/resolv.conf just gives the IP address) - it does this with
- something called an "inverse query" (basically it supplies the answer -
- the IP address - and wants to know the question that would give that
- answer), which only works if the server already has the data that does
- that particular name->address translation, and a "caching only" server
- like the one you've set up frequently doesn't.
-
- Workarounds/fixes include:
-
- - make the server on FIRE a secondary for the domain its name is in
- - direct nslookup to another server initially, then switch to FIRE with
- the 'server' command
- - get the nslookup from the BIND 4.8.3 distribution - in addition to
- fixing this problem, it has several nice features such as doing IP
- address -> name lookups without the 'PTR, reverse address' stuff, and
- allowing 'set' options on the command line (e.g. -q=... for querytype).
-
- --Per Hedeland
- per@erix.ericsson.se or
- per%erix.ericsson.se@sunic.sunet.se or
- ...uunet!erix.ericsson.se!per
-