[plug] reverse DNS and IP lookup

[James Bromberger]

On Wed, Mar 14, 2001 at 05:34:10PM +0800, Mike Holland wrote:
> Folks,
> What linux tools will do reverse DNS lookup on an IP address?

man nslookup
man dig
man host

>  And if DNS fails, is there an on-line database to say who has been
> allocated a given address?

www.aunic.net
www.apnic.net
www.internic.net
> 
> I've tried searching the 'net for revers DNS, but just found 'bind'
> configs. And the DNS HOWTO doesnt help either.

When DNS fails... well... most ervery DNS server should know the IP 
addresses for the 'ROOT' DNS servers. Thats the 'standard' root DNS 
servers. Effectively as a last resort your local DNS server should be 
able to find one of these by hard coded IP address (bind refers to this as
a 'hints' file).

Interesting topic on /. the other day of having alternate ROOT name 
servers and offering 'unsanctioned' domain names. Basically faking up 
DNS namespace by offering a completely alternate DNS. IIRC, they were 
even offering a plug-in for browsers to use to consulte these 
alternate DNS servers for the 'alternate web' space.

  James

-- 
 James Bromberger <james_AT_rcpt.to> www.rcpt.to/~james
   IT, Pelican Manufacturing - www.pelicanmanufacturing.com.au
   Snr Web Systems Admin, JDV - www.jdv.com  *  www.hartleypoynton.com.au
       * *  C u in Bordeaux - 1st Debian Conference, July 2001 * * 
 Remainder moved to http://www.rcpt.to/~james/james/sig.html
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