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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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nslookup authority

I'm using nslookup and trying to figure out the difference in authoritative and non-authoritative responses. These two responses seem to be consistent (they give the same answer if you run the command multiple times). Normal nslookup call $ nslookup…
mouche
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How do I read this ANSWER line in an nslookup

I performed an SOA nslookup on a domain and I am little confused by the exact meaning of the output (see below...names have been changed to protect the innocent): ;; QUESTION SECTION: ;MYDOMAIN.COM. IN SRV ;; AUTHORITY SECTION: MYDOMAIN.COM. 10800…
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How to get from a name server all A records pointing to a specific IP

How can I get from a specific name server, say ns.example.com, all A records pointing to a specific IP x.y.z.w ?? I've been trying with reverse DNS lookup tools, but I cant manage to get what I need.
GetFree
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I'm having some issues doing a reverse zone lookup on my nameserver

I've been trying to setup my Zones files in Bind9 and I'm having some issues with the reverse zone lookup. My nameserver is running a Query Refused when I attempt to perform a lookup on the IP. Should it not return the domain I specified? My…
Chuck
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Windows 2008 R2 DNS cant resolve own SOA

We have two Domain Controllers for our network. They both run DHCP, DNS, and ADS. They are both VM's sitting on MS Hyper V Server 2008 on separate physical hosts. We had our primary DC go down a week ago. I upgraded an already existing VM to Primary…
user46742
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Windows Server 2008 DNS - restart after changing forwarder?

I had a dns forwarder configured that seems to be choking on a particular server name so I switched to using google's dns as a forwarder (8.8.4.4). When I change that setting in Windows DNS (Server 2008 R2) Do i need to restart the dns service for…
Jim
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DYNDNS.org Custom DNS returning odd results with Windows' NSLOOKUP

I wrote some time back about running my own DNS server temporarily in order to help facilitate the move of a domain name between two registrars with no down-time. I have since purchased the CustomDNS package from DYNDNS and have populated the DNS…
tcv
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nslookup finds server name from ip, but whois claims the name has expired?

I noticed I was getting udp traffic on random ports from an unknown ip address that was definitely not on my domain today. When I looked up the ip using nslookup, it returned a name. But when I did a whois on both name whois complained that the…
Ritwik Bose
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Google Public DNS always returning NXDOMAIN for certain SLDs

Problem: Google's Public DNS returns NXDOMAIN for certain SLDs. Proof of problem: dig vpn.example.com @8.8.8.8 ; \<\<\>\> DiG 9.11.5-P4-5.1+deb10u8-Debian \<\<\>\> vpn.example.com @8.8.8.8 ; global options: +cmd ; Got answer: ;;…
Krasimir Velkov
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Vultr firewall opened ports by anonymous party. nslookup of open IP address shows non-authoritative answer "name = noptr.midphase.com". Was I hacked?

I am running a cloud server on Vultr.com. Recently, I logged into Vultr.com in my web cloud instances web interface and checked my firewall. I noticed that port 53/udp had been opened in the vultr firewall and the allowed IP was 206.217.205.100/32.…
DanRan
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How does one query the resolver name of a DNS server?

The Shodan search tool, for some DNS servers, shows a Resolver name value for what it finds on UDP port 53. For example, 80.82.117.140 shows Resolver name: server402.xenserve.com and 103.81.27.118 reports Resolver name: smartway-h7. I have searched…
bitinerant
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nslookup responds with NXDOMAIN even if the name is being resolved

I've got the postfix configured to relay all emails to a mail server: $ cat /etc/postfix/main.cf| grep relayhost | grep -v '#' relayhost = smtp.local.lan The problem is that postfix is not able to reach the mail server: Aug 22 10:34:28 hcvsload…
Krystian
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ISP and Google Public DNS can resolve hostname, but local Windows 10 machine cannot

I recently updated the DNS records for the hostname armatureenergy.com. When I do an nslookup for it with Google Public DNS (8.8.8.8) and my ISP's DNS (206.55.176.101), the name resolves. But when I use my default locally configured DNS, it fails…
geckels1
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What is the difference between DNS Lookup and DNS Resolution?

I have traversed through many websites, tutorials, documentations or personal blogs; yet, I couldn't find an exact and clear (scientific) definition (or distinction) of these two: DNS Lookup process DNS Resolution process My understanding (what I…
Giorgi Tsiklauri
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BIND 9 DNS: NS/glue closest delegation used

I have the following example existing delegation: iio.ne.co.uk NS dns1.iio.ne.co.uk, dns1.iio.ne.co.uk HOST 1.2.3.4 If I add a new delegation: soho.iio.ne.co.uk NS sohodns.iio.co.uk, sohodns.iio.ne.co.uk HOST 1.2.3.5 and I then get a query for…
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