Questions tagged [dns-lookup]
The dns-lookup tag has no usage guidance.
32
questions
0
votes
1
answer
2k
views
Resolve-DnsName resolves hostname of IP, but nslookup fails
There are some IP address that nslookup can't resolve (both on Windows and Linux).
Problem:
I can find the IP of the hostname, but reverse lookup fails.
PS C:\> nslookup.exe somehost2
Server: ...
- 154
-1
votes
2
answers
379
views
DNS lookup fails if provided domain name ends with a slash
We have successfully run an office network with various Linux servers (Ubuntu) and Windows+Linux clients for several years now. One server acts as and internal DNS server using the DNSmasq light-...
- 11
0
votes
1
answer
745
views
BIND9 local reverse lookup with public IPs - is the setup broken or is the setup faulty?
We are having a prelaunch-site to test DNS (and other services) before going hot.
I've never involved public IPs here previously and it may not work as I've intended. We have a /29-net from our ISP ...
- 11
0
votes
2
answers
328
views
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
...
- 109
0
votes
0
answers
521
views
DNS lookup failing even though tcpdump shows that nameserver has responded
DNS lookup on some of my EC2 instances have been failing intermittently. A reboot resolves the problem but it goes back to the same fail-state after a few hours (or after a few days), and remains in ...
- 1
0
votes
1
answer
1k
views
DNS client vs Nslookup - doing a manual test of the DNS client for SRV records
There are various references (such as DNS can't resolve hostname; nslookup can or https://web.archive.org/web/20160525082756/http://homepage.ntlworld.com/jonathan.deboynepollard/FGA/nslookup-flaws....
- 31
0
votes
1
answer
753
views
SPF Too Many DNS Lookups issue
In our scenario, We're running into an issue with our SPF records in route53. We are receiving SPF Too Many DNS Lookups because we are using multiple mail services. Is there a way to resolve this? I ...
-2
votes
2
answers
3k
views
nslookup is showing different ip address for subdomains [closed]
I recently moved my web service to a new host. In the new host when my clients access www they get a message saying the SSL is not correct. Under my investigation, I found a problem with the name ...
- 105
0
votes
0
answers
222
views
nginx proxy_pass only when rdns resolves correctly
I have a nginx server on PC_A running as a proxy for a website hosted on PC_B. The server on PC_A provides rate limiting, buffer and cache services for the website.
I would like to enable DNS lookup ...
- 1
1
vote
1
answer
5k
views
nslookup result for google.com
I am quite new to the networking world! I was tweaking with some networking concepts and I found that we can use DNS for load-balancing by having multiple records in a DNS name server.
So I ran a ...
- 113
2
votes
1
answer
568
views
How to identify the server providing a DNS response?
TL;DR: Where, in a nslookup www.somedomain.com -debug will I find the name/IP of the server(s) which reply to the chain of queries?
Details:
I have a setup (Windows 10 machine)
which is connected ...
- 3,617
8
votes
2
answers
1k
views
How do I figure out what's wrong with my DNS record?
My network admins have created a DNS record for thedigitalteacher.com which should include an A record for the domain root pointing to 5.10.124.142, which is indeed the response I get if I use our ...
- 83
1
vote
2
answers
3k
views
Different hostname to ip resolving results (nslookup)
Good day, everyone.
Let's say I have a following setup:
Windows 7 as host machine, DNS 192.168.0.100, 8.8.8.8, 8.8.4.4
Ubuntu 16.04 as guest machine on VirtualBox, DNS 192.168.0.100 (host?)
...
- 113
20
votes
4
answers
58k
views
Find out which DNS server answered your query
I have a seemingly simple question but couldn't find the answer to precisely that question after some search:
I know that, if I want to look up the IP address of some domain name, I type, for example: ...
- 303
0
votes
0
answers
3k
views
Proxy error: DNS lookup failure for
The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request GET /.
Reason: DNS lookup failure for: www.******.com
This is appearing sometimes ...
- 111
23
votes
1
answer
10k
views
Multi-query multiple DNS record types at once
I am currently experimenting a bit with the DNS protocol. I have noticed that I can query both, A- and MX-record of a domain, using two separate DNS packets, each containing one question query. ...
- 329
-1
votes
1
answer
1k
views
Ping can not find any subdomain at all
Following shows the information of my virtual environment.
computer name = spFull computer name = sp.spd.localdomain = spd.localInside DNS there is a Forward lookup zone, its name is spd.local and ...
- 99
13
votes
1
answer
30k
views
Nslookup not using hosts file
So I've set public IP on the hosts file for a certain public IP address, but it picks up private ip from nowhere or from DNS.
Content of windows hosts file C:\Windows\System32\drivers\etc\Hosts
...
- 141
0
votes
2
answers
234
views
cname record to rhcloud.Com not working anymore
I have a website hosted at rhcloud.com. I added 2 years ago a cname on my domain name dp-global.vn to redirect to the website (gdp-robertduy.rhcloud.com).
Today it is not working anymore and the ...
0
votes
1
answer
1k
views
DNS lookup to whois.verisign-grs.com returns SERVFAIL
I'm having a problem trying to look up a certain DNS name on the internet. For some reason I keep facing a SERVFAIL thought the correct result is displayed - like the DNS name is being resolved twice (...
- 477
-2
votes
1
answer
2k
views
When to use resolv.conf? [closed]
I understand resolv.conf file is used by Linux to resolve DNS lookup but I cant figure if I need to edit this file in my case.
My Scenario:
I am not hosting the DNS on my vps machine. I have ...
- 1,451
1
vote
2
answers
325
views
How to determine which server is the cause?
I have just registered a new domain with Malaysia NIC. The registration system is not fully automatic and I am afraid that someone could have botched something in the setting up. At the same time, ...
- 397
0
votes
1
answer
337
views
Why does this name server resolve incorrectly?
Why does this ENom name server resolve incorrectly? Earthlink is related to my ISP.
$ nslookup yahoo.com dns1.name-services.com
Server: dns1.name-services.com
Address: 98.124.192.1
Name: yahoo....
- 1,174
3
votes
1
answer
8k
views
dig succeeds, nslookup fails (with dnsmasq as the server)
I installed dnsmasq on a machine of mine (It's a Kubuntu 12.04 LTS), backed only by /etc/hosts (no connection to the Internet until later). Now, if I dig mymachine, I get 192.168.0.1, but if I try to ...
- 1,672
0
votes
1
answer
3k
views
how to change my domain to point Amazon AWS EC2 [duplicate]
I have a domain in 1and1.com , I have been using it with hostgator hosting. Now I want it to point to my amazon aws ec2 instance. Here are the steps i have followed.
I logged into AWS and chose Rout ...
- 103
2
votes
3
answers
14k
views
Bypass DNS Server lookup by using /etc/hosts when using a dynamic IP address
It is my understanding that the need to query external DNS servers for commonly accessed names can be reduced if those commonly accessed names are present in /etc/hosts.
Now, I have a situation ...
- 23
1
vote
1
answer
209
views
Why do I sometimes (but not always) see "internet address" data for an MX record in output for nslookup queries?
CentOS 5.x
I've noticed that sometimes I'll see "internet address" for an MX record in the output of nslookup. This doesn't happen all the time though.
For example, let's say that foo.com uses ...
- 11.9k
0
votes
1
answer
2k
views
Incorrect DNS Records
This is a bit perplexing to me.
When I do a NSLOOKUP on 10.0.0.17 it comes back as "ProductionServer01.domain.com" which is a decommissioned server. 10.0.0.17 is actually ProductionServer02.domain....
- 145
6
votes
2
answers
7k
views
Why is nslookup and dig giving me a "Warning: ID mismatch ... got 0" error?
I'm trying to troubleshoot some persistent connectivity issues and I'm frequently getting the following error message when using dig or nslookup.
bash$ nslookup
> www.google.com
;; Warning: ID ...
- 163
2
votes
1
answer
179
views
Do I have to own my domain before attempting to connect to my domain controller?
I am in the process of purchasing a domain, but I do not own it yet. I setup my domain controller as internal.domain.com.
The problem I'm running into is in connecting my workstations to my domain. I'...
- 171
2
votes
1
answer
10k
views
Tool for Bulk DNS Lookup with Domain or IP Information [closed]
Suggest me a tool for DNS Lookup and it should have following features.
Bulk DNS Lookup (Input .txt to Output .txt)
Should have Forward and Reverse Lookup
Should find Domain or IP information. Ex. ...
- 823
0
votes
1
answer
4k
views
Getting a reverse lookup answer from nslookup but not from dig
So if I use dig to do a reverse lookup I get:
$ dig 71.74.56.122
; <<>> DiG 9.6.0-APPLE-P2 <<>> 71.74.56.122
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<-...
- 838