Questions tagged [dns]
Domain Name System for computers, services, or any resource connected to the Internet. It translates domain names meaningful to humans into the numerical identifiers associated with networking equipment for the purpose of locating and addressing these devices worldwide.
2,486
questions
397
votes
14
answers
1.3m
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Command line to list DNS servers used by my system
Is there a command to list DNS servers used by my system?
I tried
$ cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY ...
- 4,134
323
votes
17
answers
614k
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How do I clear the DNS cache?
I just updated the DNS record (ns1, ns2, ns3.myhostingcompany.com) for a site I've got hosted, but I still get the domain registrar parking page.
I'd like to see if the problem is Ubuntu's cached DNS ...
- 3,899
166
votes
5
answers
372k
views
How to disable systemd-resolved in Ubuntu?
How can I disable systemd-resolved in Ubuntu 17.04?
Disabling it with systemctl disable didn't work, the service seems to be restarted (by Networkmanager?)
- 4,696
155
votes
5
answers
981k
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How do I configure my DNS settings in Ubuntu server?
According to this page it appears to be simple. However, /etc/bind does not exist on the default installation of Ubuntu 12.04.3 LTS server.
So, without installing any further software, how can ...
- 1,565
124
votes
13
answers
483k
views
How do I get resolvconf to regenerate resolv.conf after I change /etc/network/interfaces?
After updating /etc/network/interfaces with something very similar to below, how do I get /etc/resolv.conf to update? I tried (as root) resolver -u, service networking restart but they didn't work. I ...
- 1,361
104
votes
11
answers
181k
views
New alert keeps showing up: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001
I just installed a new Ubuntu Server 18.04. I set my hostname hostnamectl set-hostname ****.openbayou.biz and I set /etc/hosts:
127.0.0.1 localhost
[ip address] ****.openbayou.biz hostname
# The ...
- 1,309
95
votes
12
answers
318k
views
DNS set to systemd's 127.0.0.53 - how to change permanently?
I've recently upgraded to 17.10. When I try to browse to a website, or ping a domain it fails saying the site cannot be resolved.
network-admin shows the contents of /etc/resolv.conf to be ...
- 1,796
90
votes
4
answers
132k
views
What is difference between localhost address 127.0.0.1 and 127.0.1.1
I am just learning using Ubuntu and when I tried to configure the DNS, I need to deal with something call localhost, loopback interface. Can anyone explain me the differences between them and the ...
- 1,001
89
votes
7
answers
182k
views
Ubuntu 18.04 no DNS resolution when connected to OpenVPN
When I connect to a VPN network through Gnome Network-manager I lose DNS resolution and in practice, I cannot access resources inside the VPN network or outside.
When I was using Ubuntu 16.04 and I ...
- 1,408
88
votes
3
answers
120k
views
How can I flush the DNS on Ubuntu 17.04?
How can I flush the DNS on Ubuntu 17.04?
I seem to have a few DNS issues at the moment since upgrading to 17.04 from 16.10 and went to flush the DNS but I can't find how to.
Can anyone tell me ...
- 3,489
77
votes
15
answers
248k
views
What is the proper way to change the DNS IP?
I suspect that the name server provided by my ADSL modem/router is buggy. Whenever I browse to a website for the first time in ubuntu, resolving the domain name takes at least 15 seconds.
To work ...
- 873
72
votes
13
answers
201k
views
Wrong nameserver set by resolvconf and NetworkManager
My DNS server is 192.168.1.152.
This DNS is provided to clients by DHCP. The windows clients on my LAN resolve names properly using that DNS, but my Ubuntu VM doesn't.
The VM is set up with bridge ...
- 721
68
votes
13
answers
635k
views
How do I configure my static DNS in interfaces?
I am using Ubuntu 12.04.
My /etc/network/interfaces file consists of:
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 ...
- 781
66
votes
3
answers
124k
views
Prefer A (IPv4) DNS lookups before AAAA(IPv6) lookups
In notice my newly installed Ubuntu 10.10 always does an AAAA DNS lookup before A record lookups. Is there any way I can configure the system to do A lookups first ?
(While various browsers and other ...
- 1,243
65
votes
4
answers
187k
views
network manager: how to stop nm updating /etc/resolv.conf
I do not want network manager to add DNS servers received from DHCP to my /etc/resolv.conf.
When configuring from GUI/Connections/IPV4 and choose the method Automatic (address only) it still adds DNS ...
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64
votes
2
answers
351k
views
How to flush dns in ubuntu 12.04? [duplicate]
how to flush dns of Ubuntu 12.04 LTS (GNU/Linux 3.2.0-23-generic x86_64)
have tried many things form here and here also but nothing is working
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61
votes
9
answers
556k
views
How do I set a static IP in Ubuntu?
I am a new with Linux, having years experience with Windows servers/desktops and am having issues setting a static IP. I am using a method used for previous versions of Ubuntu, which doesn't seem to ...
- 713
61
votes
4
answers
60k
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nslookup finds ip for a hostname in .local domain, but ping does not
I know this looks like all the other "can ping via ip but not dns" questions, but those didnt really help me at all.
Also, having hosts files in all machines is not doable as this server will ...
- 1,015
54
votes
5
answers
280k
views
How do I configure the search domain correctly?
I recently installed Ubuntu GNOME on my work computer, replacing Windows 7, because I will be doing a lot of Linux development work.
Many of our configuration and development scripts use shortened ...
- 1,394
49
votes
3
answers
101k
views
DNS_PROBE_FINISHED_BAD_CONFIG error in Ubuntu 14.04
I am running Ubuntu 14.04 LTS on my Dell M3800.
I am having problems connecting to the Internet.
I getDNS_PROBE_FINISHED_BAD_CONFIG in my browser when trying to navigate to any site, but I am able ...
- 1,331
48
votes
11
answers
237k
views
How to view the DNS address assigned by DHCP?
How to view the DNS address assigned by DHCP?
ifconfig can not show it.
$ ifconfig -a
eth0 Link encap:Ethernet HWaddr 90:e6:ba:22:6a:f2
inet addr:192.168.1.111 Bcast:192.168.1.255 ...
- 825
48
votes
4
answers
107k
views
How to disable systemd-resolved and resolve DNS with dnsmasq?
Ubuntu 16.10+ uses systemd-resolved as DNS resolver.
I prefer the setup 16.04 uses, dnsmasq as the resolver.
How can I do that on 16.10+, especially on 17.04?
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46
votes
7
answers
28k
views
How can I tell which DNS servers DNSMasq is using?
How can I tell which DNS servers DNSMasq is using to resolve a name to an IP address?
I can't figure it out. All of the existing questions here seem to just go as far as telling users that they are ...
- 911
46
votes
2
answers
136k
views
What does the dns-search option mean in /etc/network/interfaces?
Can anybody explain to me about the dns-search directive in /etc/network/interfaces file:
iface eth0 inet static
address 192.168.3.3
netmask 255.255.255.0
gateway 192.168.3.1
dns-...
- 2,335
44
votes
2
answers
107k
views
How to use host names rather than ip addresses on home network?
I've a small home network up and running and managed to set up ssh. Can anyone tell me what I need to do to refer to one computer on the network from another by host name rather than IP address (which ...
- 1,145
44
votes
4
answers
583k
views
connect: Network is unreachable? - ping
When I attempt to ping google's dns or any outside the network I get
connect: Network is unreachable?
I can't update either which I put down to this
I am new to networking... And Ubuntu. But these ...
- 705
43
votes
5
answers
100k
views
NetworkManager not populating resolv.conf
I recently upgraded from 11.10 to 12.04, and now NetworkManager isn't populating /etc/resolv.conf when connecting to wireless networks, when it had been working perfectly in 11.10. I'm not seeing any ...
- 6,485
43
votes
10
answers
89k
views
No internet after upgrade from 16.04 to 18.04
After the upgrade I noticed that I don't have internet access. The wired network and the wifi settings looked good, but it didn't work. After the login the system always switched itself into airplane ...
- 1,099
43
votes
11
answers
177k
views
Why is the /etc/hosts file not working?
I have been having problems with this for a while and have tried everything I know, so I figured it was finally time to ask for some help.
Any edit I make to /etc/hosts just doesn't work.
Example:
...
- 681
39
votes
9
answers
39k
views
What Can Be Done To Secure Ubuntu Server?
I have a project to secure Ubuntu Server as much as I can.
The server is a web hosting server. The server will be running LAMP , Mail , and DNS.
- 27.2k
39
votes
9
answers
27k
views
Problem resolving many web pages
I am presently running Ubuntu 12.04 and using Chrome/Firefox along with OpenDNS (have tried Google Public DNS as well as DNS of my ISP).
Suddenly, a lot of websites that I visit frequently don't ...
- 13.4k
38
votes
8
answers
106k
views
Ubuntu 18.04 .local domain dns lookup not working
I'm using a Raspberry Pi 3 with Ubuntu 18.04. At my company we have a DNS server and a couple of domains with ".local".
I know technically this isn't correct and it should be ".lan" instead, because ....
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38
votes
5
answers
151k
views
Ubuntu Server 18.04 Temporary failure in name resolution
I have just installed Ubuntu Server 18.04 and set up SSH so I can continue configuring via my desktop but I've run into some issues that I can't seem to get past.
I was trying to run
sudo apt-get ...
- 541
36
votes
6
answers
86k
views
Ubuntu DNS Error Chrome: DNS_PROBE_FINISHED_NXDOMAIN, Firefox similar
I am unable to visit most sites online in either firefox or chrome. I can access google docs so I am researching on windows 7 (dualboot) and rebooting into Ubuntu (recently upgraded to 16.04).
Test 0:...
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36
votes
4
answers
54k
views
16.10 fail to resolve DNS
After upgrading my 16.04-installation to 16.10, I have trouble with DNS.
First I got problems a couple of times when connected to WiFi, while it worked on ethernet. Now it seems to work on WiFi also. ...
- 542
36
votes
6
answers
52k
views
docker.io DNS doesn't work, it's trying to use 8.8.8.8
Edit 2020: This is a six year old question. I never figured out how to fix this specific problem back then, but Docker and everything else involved moved on. SE doesn't allow me to delete my question, ...
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35
votes
4
answers
164k
views
Should I edit my resolv.conf file to fix wrong DNS problem?
I have the problem that my Ubuntu machine uses the wrong DNS server. For some reason the machine queries localhost for DNS information.
I have added the DNS server in the network settings GUI, but /...
- 2,097
35
votes
2
answers
39k
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What does ".local" do?
I've got several Ubuntu machines on my network at home, but the DNS is provided by a windows server (2K). When I ssh to them from another , if I ssh to them as "machine" I can't connect, but if I ...
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34
votes
1
answer
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Problem with IPv6 sudo apt-get update/upgrade
I am using Ubuntu 16.04 Beta 2 at the moment and every time I try to update at home via sudo apt-get update or upgrade trough sudo apt-get upgrade I wont get any feedback. Even installing of anything ...
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32
votes
9
answers
32k
views
No Internet connection after disconnecting from VPN in Ubuntu 18.04
In Ubuntu 16.04 I had no problems with VPN: after disconnecting I had Internet.
In Ubuntu 18.04 I have no Internet after disconnecting from the VPN. I can actually ping 8.8.8.8 but not www.google.com ...
- 4,000
31
votes
4
answers
14k
views
Route complete TLD (*.dev for example) to 127.0.0.1
For development purposes I want all DNS requests to the .dev TLD to forward to my own PC.
The hosts file does not suffice. I use multiple domains and also multiple subdomains. I would have to add a ...
30
votes
2
answers
31k
views
Having DNS Issues when connected to a VPN in Ubuntu 13.04
I am connecting to a Cisco VPN Server using vpnc. Once connected, my machine was unable to automatically update DNS setting from the new VPN. I tested by temporarily changing /etc/resolv.conf with the ...
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30
votes
3
answers
96k
views
Why is my /etc/hosts file not queried when nslookup tries to resolve an address?
I have a couple of local domains resolved to 127.0.0.1 in my /etc/hosts file. And it was all alright for a period of time but now when I run:
nslookup test.local
It results in:
Server: 192.168....
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votes
6
answers
60k
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Best way to set up DNS caching?
In order to speed up DNS lookups, I want to install a DNS cache or proxy.
I can see at least three programs I think will do the job: bind9, pdnsd, or dnsmasq.
I would like to make sure that if I ...
user8979
29
votes
4
answers
13k
views
systemd-resolve high cpu usage after update to 17.04
I have recently upgrade my Xubuntu from 16.10 to 17.04.
Every things works well except systemd-resolve. some times it makes cpu usage too high and I don't know why this issue has been happend.
And ...
- 5,768
29
votes
5
answers
43k
views
systemd-resolved does not query dns server for local domain
Since upgrading to 17.04 I can no longer resolve addresses in my local network (silvesternet.local). I get the following response:
$ systemd-resolve edgerouter
edgerouter: resolve call failed: No ...
- 393
28
votes
3
answers
64k
views
How to know what DNS am I using in Ubuntu 12.04
We used to get current DNS settings by:
cat /etc/resolv.conf
But Ubuntu 12.04 has changed to use the resolvconf framework.
The above commond will only give me this:
# Dynamic resolv.conf(5) ...
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28
votes
2
answers
84k
views
How to get the hostname from /etc/hostname & DNS domain name?
How do I get the host name from /etc/hosts? by writing hostname?
And what about the dns domain name, how do I get that?
How do I get these names through the commandline?
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27
votes
5
answers
22k
views
How can I set up local wildcard (127.0.0.1) domain resolution on 18.04..20.04?
On Ubuntu 14.04 I'm using dnsmasq to resolve wildcard example.com domains to the local machine (desktop computer at home).
After much reading around I cannot for the life of me sort out the same on a ...
- 331
26
votes
3
answers
52k
views
DNS at systemd's 127.0.0.53 is ignoring some lookups
The systemd's DNS lovated at 127.0.0.53 appears to be working except when I query for local machines by name. But if I query for them and specifically specify the local DNS server (my router) then I ...
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