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Questions tagged [nslookup]

GENERAL NSLOOKUP SUPPORT IS OFF-TOPIC. Support questions may be asked on https://superuser.com. nslookup (name server "lookup") is a utility that queries the Domain Name System (DNS) to obtain domain name or IP address mapping.

nslookup is commonly used to refer to the network administration command-line tool found in most operating system, but can also be used to reference component libraries, which are available for a variety of programming languages.

References:

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python module for nslookup

Is there a python-module that's doing the same stuff as nslookup does? I am planning to use nslookup on digging some information regarding the domain of a URL to be scrapped. I know I can use os.sys to call nslookup but I am just wondering if there…
jaysonpryde
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nslookup reported "can't resolve '(null)': Name does not resolve" though it successfully resolved the DNS names

I am on ubuntu, and I am running a docker default bridge network. I have containerized versions of zookeeper, kafka, and an app that I wrote that talks to kafka. I do a: docker exec -it /bin/bash Then inside my app's container I run…
smuggledPancakes
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Why golang Lookup*** function can't provide a server parameter?

For nslookup command, it has nslookup somewhere.com some.dns.server. However, it seems that golang dnsclient only load config from /etc/resolv.conf code here: https://golang.org/src/net/dnsclient_unix.go#L225 Does the golang standard library…
holys
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Reverse DNS in Ruby?

I'm in an environment with a lot of computers that haven't been properly inventoried. Basically, no one knows which IP goes with which mac address and which hostname. So I wrote the following: # This script goes down the entire IP range and attempts…
garg
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Resolve hostname in PHP using different name server

How I can resolve hostname to IP address using PHP, but using different nameserver (eg. OpenDNS or Google Public DNS). It not seem that dns_get_record() or gethostbyname() are able to use a different nameserver than one currently set up on the…
Nick
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Why dig does not resolve K8s service by dns name while nslookup has no problems with it?

Here are steps to reproduce: minikube start kubectl run nginx --image=nginx kubectl expose deployment nginx --port=80 --type=ClusterIP kubectl run -i --tty --rm alpine --image=alpine --restart=Never -- sh apk add --no-cache bind-tools Now let's…
Kirill
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Reverse DNS lookup in perl

How do I perform a reverse DNS lookup, that is how do I resolve an IP address to its DNS hostname in Perl?
Joakim
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Most efficient way to programmatically determine if a web domain is available?

I am writing some code to determine whether a network domain is registered. For example, I want to check if "Google123.com" is available. There are at least two ways I can do this programmatically, but I'm not sure which is more valid: A) In…
jm.
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Kubernetes DNS lookg not working from worker node - connection timed out; no servers could be reached

I have build new Kubernetes cluster v1.20.1 single master and single node with Calico CNI. I deployed the busybox pod in default namespace. # kubectl get pods busybox -o wide NAME READY STATUS RESTARTS AGE IP NODE …
sfgroups
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How should I interpret a "Can't find..." from nslookup inside a Docker busybox container?

I don't understand the output I'm getting. If I run: docker run --rm busybox nslookup google.com, I'll get: Server: 192.168.65.1 Address: 192.168.65.1:53 Non-authoritative answer: Name: google.com Address: 2a00:1450:4009:806::200e ***…
Daniele Procida
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First DNS Lookup always fails

I'm having a very weird problem with a new Windows 10 Pro build using an intel I219-v adapter (integrated into the mobo). Every time a DNS lookup occurs, either in a browser or triggered manually via command prompt, the first request times out and…
Tristan Dickson
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How to perform "nslookup host server"

My C# service needs to periodically poll nslookup host server. Currently it spawns a Process that executes batch script. Due to performance reason I'm considering to do this check using some API. But the problem is, that using, for example,…
Roman
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Is there an equivalent function of nslookup command in node.js?

Is there an equivalent function of nslookup in node.js? Here's the execution result of nslookup command on my MacBook Pro: > nslookup www.amagicshop.com.tw 8.8.8.8 Server: 8.8.8.8 Address: 8.8.8.8#53 Non-authoritative…
Brian
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Is there a unix command to retrieve NS records from domain?

I am looking for a way to get the primary and secondary NS records of a given domain name, and the IP addresses associated with them. Now this kind of information is available from websites like intodns.com, but I am working on a huge list of…
Zenet
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Linux Command for a Raw DNS Response

Does anyone know how to fetch the raw output of a DNS query using a particular linux command? The commands that I am familiar with are: % host % nslookup % dig % whois however, each of these play around with DNS in some form or another, but how can…
matsko
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