nslookup -- ls option not implemented

telg · 12-09-2007, 06:30 PM

hi there

as a relatively new linux user, I have been having problems with options in nslookup. There is nothing in the man pages, and I have tried searching for answers, but so far to no avail...

I am finding that options such as -ls and even -help are not implemented:

nsloopup
>set type=any
>ls google.com
The 'ls' command is not implemented
>help
The 'help' command is not yet implemented

Another (almost identical post) suggested going to the site: http://incubator.apache.org/ftpserver/ftp_commands.html
for answers, but i have found that the site doesn't exist now.

is this a changable setting? does the 'yet' mean that help can be changed but ls cannot? or is this just due to server restrictions? I tried this on both an external server and on my own isolated machine (no internet) just to try, and got the same result. am I doomed to failure??

If so, are there similar options on dig that would do the same thing?

many thanks

telg

twantrd · 12-09-2007, 10:25 PM

There is no 'ls' command in nslookup. Proper usage of nslookup is like this:

Code:

[twantrd@twantrdlinux ~]$ nslookup
> google.com

Non-authoritative answer:
google.com      nameserver = ns2.google.com.
google.com      nameserver = ns3.google.com.
google.com      nameserver = ns1.google.com.
google.com      nameserver = ns4.google.com.

Authoritative answers can be found from:
google.com      nameserver = ns3.google.com.
google.com      nameserver = ns4.google.com.
google.com      nameserver = ns2.google.com.
google.com      nameserver = ns1.google.com.
ns1.google.com  internet address = 216.239.32.10
ns2.google.com  internet address = 216.239.34.10
ns3.google.com  internet address = 216.239.36.10
ns4.google.com  internet address = 216.239.38.10

If you wanted to search for a particular record:

Code:

[twantrd@twantrdlinux ~]$ nslookup
> set q=MX
> google.com

Non-authoritative answer:
google.com      mail exchanger = 10 smtp4.google.com.
google.com      mail exchanger = 10 smtp1.google.com.
google.com      mail exchanger = 10 smtp2.google.com.
google.com      mail exchanger = 10 smtp3.google.com.

Authoritative answers can be found from:
smtp4.google.com        internet address = 72.14.215.25
smtp1.google.com        internet address = 72.14.203.25
smtp2.google.com        internet address = 64.233.167.25
smtp3.google.com        internet address = 64.233.183.25

-twantrd

safal · 11-21-2008, 01:48 AM

there is a "ls" option in nslookup and is used for zone transfer.
this option lists all the record in the queried domain. thus, basically this feature is disable for security reasons.