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Questions tagged [nslookup]

nslookup is a utility to query DNS name servers

nslookup is a utility to query DNS name servers. It has two modes: interactive and non-interactive. Interactive mode allows the user to query name servers for information about various hosts and domains or to print a list of hosts in a domain. Non-interactive mode is used to print just the name and requested information for a host or domain. It is available on several systems like Unix-like systems and Windows systems.

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Windows 2012 R2 DNS SERVFAIL on linux / mac clients

SERVFAIL is causing issues with some of our applications on linux/macs. I presume this is Windows DNS causing some problems with our linux/mac clients? Then again Windows clients are able to do shortname lookup without any issue. From a Mac/Centos…
lbanz
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Network Scan, Filtering for Top Level Domain

Greetings, I have a list of 2 /24s worth of IP addresses in seperate text files. What I am interested in doing is finding a way to resolve the hosts of these IP addresses and filter out to display only the top level domain. for example; 192.168.1.1…
Nick O'Neil
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What an nslookup command return if multiple sites are assigned to the same IP

I read in a book that nslookup command is used to find the IP address from a domain name and vice-versa. And domain name are just the names given to the IP Addresses as it is easy to remember names than the numbers. When I type a domain name into…
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Garbage DNS record

nslookup returns 2 IP addresses for one of the clients in my network: Server: dc.mynet.local Address: 192.168.43.1 Name: fileserver.mynet.local Addresses: 192.168.43.2 192.168.45.2 My DNS server have no "192.168.45.2" record, at…
GCRaistlin
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Cannot resolve hostname of devices connected to a wireless network using ip address ** server can't find x.x.x.x.in-addr.arpa.: NXDOMAIN

I'm trying to resolve the hostname of devices connected to my wireless lan network through their ip addresses. I'm using a macbook and my /etc/resolv.conf show this as my dns server (192.168.1.1) which is a wireless router #This file is…
Arun Sampath
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Perform authoritative DNS A record lookup with single command?

To get the authoritative A record for the apex of a domain I'm using: $ nslookup -q=ns example.com Server: 194.168.4.100 Address: 194.168.4.100#53 Non-authoritative answer: example.com nameserver = a.iana-servers.net. example.com nameserver…
AJP
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Mail client continues to use old MX record after TTL expired; authoritative entry missing

I changed MX records at my domain name provider (network solutions) twice today. One test client is still sending mails to the older record even though its TTL has expired. So, in other words, this is what happened: Changed MX records to point to…
Tyler Durden
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Why is DNS lookup slow to specific domains only?

We're running Windows DNS servers, but they are not authoritative. So we point to caching servers as forwarders. That said, for the following two domains we get a rather long delay in DNS lookup IF the domain hasn't already been cached to our…
Grimzly
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In a BIND.. Weird DNS issue

I have now somehow replicated a weird issue with one of my DNS zones on two different servers and with two different versions of ISC BIND. I have a sub-domain delegated to my server. The first time this issue reared its ugly head was for an A…
David Hornsby
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why is a wget to http://graph.facebook.com resolving to my server's IP?

This makes absolutely no sense and I spent 3 hours trying to figure this out. Suddenly all my scripts connecting to Facebook stopped working, so I tried to do this: root@s01 [~]# wget http://graph.facebook.com --2015-11-18 15:27:47-- …
user2642641
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PC's cant resolve the servers name

we've recently upgraded our server and we've been having an issue where the computers can't find the server without me mapping it's IP in the hosts file. They can find it when I fully qualify it with the domain name, but without it, theyre unable…
Craig White
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nslookup is OK, but curl says Couldn't resolve host

curl -L https://github.com/docker/compose/releases/download/1.3.1/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose % Total % Received % Xferd Average Speed Time Time Time Current …
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nslookup how to get list of domains in a DNS server

I want to list all domains In a DNS Server. More details: spouse that foo.com is a web hosting company and ns1.foo.com is their DNS server. the web sites foo1.com to foo100.com are hosted by this company and their dns server is set to…
mrd abd
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Why is ping not returning local DNS cache result? (Using DNS caching server on an internal network.)

Yet another post about this nslookup works but ping does not. I’ve read a handful of forum posts but could not find anything relevant to my setup and problem, of resolving external domain names on an internal only network. My Lab: VMWare…
Paweł Czopowik
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Understanding apparent DNS changes between centos 6 and 7

I have a couple of test systems running Centos 6 and I thought I'd try out Centos 7. Apart from all the obvious differences (no iptables, no ifconfig), there is one thing that really had me scratching my head. On centos 6, my hostname looks like…
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