DNS question

[Joe Kattner]

NXDOMAIN means non existent domain. There is no PTR associated with that IP
address.

--Joe

-----Original Message-----
From: Joe Chancellor [mailto:junk at eat-me.net]
Sent: Wednesday, August 07, 2002 3:14 AM
To: comp-protocols-dns-bind at isc.org
Subject: DNS question


I am trying to search a range of IP addresses for webpages.  I got the
script running correctly, but I think I am not using either the right
command or possibly do not know the correct command line options.

This works:

C:\>host msn.com
msn.com has address 207.68.172.246
C:\>host 207.68.172.246
246.172.68.207.in-addr.arpa domain name pointer email.msn.com.
246.172.68.207.in-addr.arpa domain name pointer msn.ca.
246.172.68.207.in-addr.arpa domain name pointer msn.com.
246.172.68.207.in-addr.arpa domain name pointer msn.net.
C:\>

but why does this example not work:

C:\>host firstname.com
firstname.com has address 66.60.188.100
C:\>host 66.60.188.100
Host 100.188.60.66.in-addr.arpa not found: 3(NXDOMAIN)
C:\>

I am pretty new to DNS and Linux, so I am a little confused.  Any help is
appreciated.  Don't let the C prompt fool you it is a Linux box.  Just did
it to mess with my boss.

TIA

Joe