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NSLOOKUP Output

I am trying the NSLOOKUP, but it gives me the same result either with hostname or IP address:

H:\>nslookup 10.10.10.10
Server: UnKnown
Address: 10.10.10.11

Name:aaaa.bbb.com
Address: 10.10.10.10

H:\>nslookup 10.10.10.11
Server: UnKnown
Address: 10.10.10.11

*** UnKnown can't find 10.10.10.11: Non-existent domain
===============
I am not sure the meaning of "Unknow" keyword. I believe it refers to DNS server name that resolved the address, but why it is not showing its name.

Thank you

SOLUTION

Lior Karasenti

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jskfan

ASKER

it resolved the name:
Name:aaaa.bbb.com
Address: 10.10.10.10

But, the server that has resolved it , is Unknown.
why is it showing Unknow ??

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msallam

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jskfan

ASKER

That s what I was asking ...why the DNS server name is showin as Unknow ?

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msallam

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SOLUTION

footech

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jskfan

ASKER

if I ping with -a switch I get the hostname

ping -a 10.10.10.10

Pinging aaaa.bbb.com [10.10.10.10] with 32 bytes of data:
Reply from 10.10.10.10: bytes=32 time=1ms TTL=57
Reply from 10.10.10.10: bytes=32 time=1ms TTL=57
Reply from 10.10.10.10: bytes=32 time=1ms TTL=57
Reply from 10.10.10.10: bytes=32 time=1ms TTL=57

Ping statistics for 10.10.10.10:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = 1ms, Average = 1ms

======================

it is just the DNS server name that does not show up ....
As Msallam said above:
<<2. The DNS server does not have an A record for itself (or for the IP 10.10.10.11 if it has several IPs).
>>

the company does not use Windows DNS, it uses infoblox.
something must have been changed, because I used to get the DNS server name when I run Nslookup against any host in the network

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msallam

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ASKER CERTIFIED SOLUTION

Bruno PACI

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msallam

It is as liorkr, footech and Pac1B stated. Thx for pointing it out.

It is the PTR record is the one that maps an IP to a name.
It is a mistake from my end that I stated and built on it what was stated later. I was a bit busy with other stuff.

This (PTR record) is Auto-created too when you create the relevant reverse-lookup zone on Infoblox.

Check if it the same case for other machines as I proposed in the last post.

jskfan

ASKER

Thank you guys