topic nslookup on Linux in Operating System - Linux

nslookup on Linux

KPS — Wed, 27 Oct 2004 12:01:54 GMT

Hi,

I'm seeing some differences in the way nslookup shows Resolved IP and Host info...

On RedHat 2.1, I use nslookup for look up on an IP and get: (Reverse Address DNS Address and Hostname resolved)

Example:) 52.205.102.10.in-addr.arpa

If I do this on an HP-UX 11.11 I only get the forward IP.

What I'm wondering is if this is correct behavior consistent with what each OS shows you or could there be something wrong with my Host Configurations in /etc/resolv.conf or /etc/nsswitch.conf on either one of these nodes specifically?

Re: nslookup on Linux

Steven E. Protter — Wed, 27 Oct 2004 12:54:42 GMT

nslookup performance is determined by a number of files:

/etc/resolv.conf
/etc/nsswitch.conf

depending on the above /etc/hosts

You might want to check out the behavior of dig. It should be consistent with nslookup, but Linux has warned for years about de-supporting nslookup. If there are variances you may have nothing to change.

For reverse lookups you usually have to provide nslookup a parameter nslookup -x or nslookup -r

SEP

Re: nslookup on Linux

Jan Sladky — Mon, 01 Nov 2004 20:22:35 GMT

hi Ken,
try to compare it with

dig and host commad

reverse lookup is done with same option -x

dig -x ip
host -x ip

br Jan

Re: nslookup on Linux

Ross Minkov — Sun, 07 Nov 2004 09:38:07 GMT

The output that nslookup produces on linux and hp-ux looks different. Both provide the same information but it is formated differently.