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.

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21
votes
8answers
26k 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 ...
75
votes
13answers
236k views

How do I add a DNS server via resolv.conf?

Is /etc/resolv.conf useless in Ubuntu 12.04 LTS (Precise Pangolin)? I see that the DNS server information is stored in NetworkManager now. The nmcli command line tool can list that for you. If I ...
28
votes
6answers
5k views

Problem resolving many of the 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 ...
43
votes
10answers
47k views

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 ...
18
votes
6answers
12k 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.
26
votes
4answers
71k views

Command-line to list DNS servers

Is there a command to list dns servers? 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 HAND -- YOUR ...
23
votes
5answers
5k views

Virtualbox DNS stopped working on upgrade to 12.10

I have a Debian image setup on Virtualbox that uses the default NAT to access the internet. It was working fine before I upgraded to 12.10. After I upgraded the DNS lookups no longer work. I still can ...
24
votes
2answers
15k views

How do I get resolvconf to regenerate resolv.conf after I change /etc/network/interfaces?

After updating /etc/networking/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 ...
23
votes
4answers
33k 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 ...
14
votes
7answers
7k views

Why does my resolv.conf file get regenerated every time?

My /etc/resolv.conf file gets regenerated every time, making me loose Google DNS servers when I reconnect my 3G modem. For changing the DNS settings, I looked at ...
7
votes
4answers
989 views

How to reach a host in the same network by hostname?

I have a network which connects a couple of hosts. I would like to be able to reach other hosts from one of them using the hostname. I just discovered the ".local" domain, which is available through ...
3
votes
1answer
8k views

How to redirect a URL to a custom IP address?

I have an Ubuntu machine that I'm using as my home Internet router. It uses a USB mobile broadband modem as its Internet connection, and shares this with another router (via the router's "Internet" ...
16
votes
4answers
50k views

How do I edit my resolv.conf file?

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 ...
9
votes
5answers
21k views

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 ...
5
votes
1answer
23k views

Can not access Internet (DNS names do not resolve) after update today

I have been using Precise for a few weeks now for work with no problem. Today, I am not able to access any website using either wired or wireless connections. I installed the updates today which ...
9
votes
3answers
10k views

DNS server address no longer stored in resolv.conf; where is it now?

I sometimes switch DNS servers, using the NetworkManager indicator in the taskbar; this worked fine with previous versions, and actually works fine with 12.04, too, except for one thing: I use Conky ...
11
votes
4answers
7k views

Why can't my machine resolve local windows hostnames?

When I ping any local windows hostname from my Ubuntu machine I get "unable to resolve host", but when I ping from a windows machine it works fine. Why would this be? OS: Ubuntu 10.04 Samba & ...
1
vote
3answers
2k views

DNS server configuration is changed automatically

The default DNS server was running too slowly, so I changed the configuration by adding a nameserver. /etc/resolv.conf : nameserver 202.102.192.68 nameserver 210.45.240.99 domain ***edu.cn search ...
2
votes
2answers
4k views

Set up domain name on private server

I have a Linux server (Ubuntu 12.04) I'm using to learn as much as I can about server management. I've got as far as getting a full LAMP setup running, but have hit a dead end trying to get a domain ...
1
vote
1answer
2k views

Internet connection not working although it says it is connected

I have a Toshiba z830 with ubuntu 12.04. I could use without problems the DSL connection (I have no router, only a modem) at home until a couple of days ago: It stopped to work when while connected ...
17
votes
4answers
23k views

resolv.conf doesn't get set on reboot when networking is configured for static ip

I'm experiencing what appears to be a name resolution issue in Ubuntu 12.04 Server edition when configuring my computer to use static ip. In /etc/network/interfaces: # The primary network interface ...
3
votes
2answers
3k views

Why is ddclient giving me an “Invalid IP” error when trying to update dynamic DNS?

I am having a really hard time getting ddclient (which updates OpenDNS with my current IP address) to work. I have it running as a daemon, but it never succeeds in updating my IP address at openDNS. ...
6
votes
4answers
14k views

internet access problem in 12.04

Yesterday, I have upgraded Ubuntu from 11.10 to 12.04 LTS and everything was ok (there was no error) After restart, my "Auto Ethernet" connection established, also my VPN connection established.And ...
2
votes
3answers
2k views

How can I configure my server so that my domain points to it?

I have bought a domain name (without hosting), and at home I have a static ip address on Ubuntu server 11.04. How can I redirect users to my web server at home? What configuration needs to be done?
0
votes
1answer
46 views

How to make Ubuntu never use specified DNS server? (DNSLeak issues)

Im using VPN and dnsleaktest.com shows me that it discovered vpn dns and my isp dns. I want to avoid using isp dns when using vpn. I found I can use prepend domaine name servers in ...
4
votes
0answers
335 views

How to change the DNS name server? [duplicate]

Possible Duplicate: What is the proper way to change the DNS IP? How to change the DNS NameServer in Ubuntu 11.04, When I typed node.ws on browser url-bar it redirected me to ...
1
vote
4answers
1k views

DNS stopped working on laptop

Was working fine then stopped inexplicably. I can ping the gateway/DNS router/firewall (Untangle) using WiFi and cable using WiCd. Network Manager does not work on this computer Firefox reports ...
0
votes
2answers
659 views

DNS on static IP address

I have setup my mythtv server (runnning ubuntu 12.04) to have a static IP address. This is required because the IPAddress must be hardcoded in the mythtv server settings and if it changes the the ...
0
votes
1answer
2k views

Troubleshooting wireless network connection: DNS not working

I have a wireless router that assigns IPs using DHCP. My laptop (Acer Aspire 1 110L running Ubuntu 10.10) connects to the wireless network, but DNS is not working. I've tried to trouble shoot the ...
13
votes
5answers
98k 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 ...
11
votes
2answers
5k views

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 ...
5
votes
6answers
18k views

How to get hostname from DHCP server

I want Ubuntu to get hostname and DNS name from DHCP client. Default installation of 11.10 does not do that. Update: same question asked and Unsolved
4
votes
2answers
248 views

My computer stops seeing the other computers on my network

I'm running Ubuntu 11.04. Sometimes my computer stops seeing the names of the other computers on my network. So I can no longer log into another computer by typing the hosting name e.g. ssh ...
3
votes
2answers
5k views

Extrememly slow DNS lookup

Ubuntu 12.10 I'll explain the first problem. Sometimes when I load a webpage it never finishes loading and it says cannot reach server or something like that. When I ping that website, the terminal ...
3
votes
1answer
22k views

How to Disable External DNS recursion?

I know that to disable recursive queries in BIND, I need add the following lines to the options section of /etc/bind/named.conf.options allow-transfer {“none”;}; allow-recursion {“none”;}; recursion ...
5
votes
6answers
5k views

How to check if DNS is encrypted?

I have installed DNSCrypt , its OpenDNS encrypted DNS patch for Ubuntu & other Linux users & it's working fine. How do I know if my DNS is encrypted? I have googled but didn't find anything. ...
2
votes
3answers
2k views

How do I enable DNS caching in the NetworkManager-controlled dnsmasq?

Ubuntu Desktop 12.04 uses dnsmasq to perform DNS lookups, but it is not configured to cache these results. (I have checked this by using dig to resolve names and I do not see a large improvement in ...
1
vote
4answers
3k views

WIreless connects but Internet stops working on Ubuntu 12.04 64 Bit and Broadcom 4313

I'm running Ubuntu 12.04 64 Bit on a HP Pavilion dm4. It has a Broadcom 4313 Wireless Adapter and a Realtek RTL8168D/8111D Ethernet Adapter. I haven't been able to get consistent internet access from ...
0
votes
2answers
1k views

why do none of my local servers resolve

When I try to ping or browse using a web browser certain domains names that we host on our local network, it does not work. Yet dig, nslookup correctly return their details. What do I need to do to ...
7
votes
2answers
7k views

What is my DNS server?

My /etc/resolv.conf looks like this: # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN nameserver ...
6
votes
3answers
6k views

DNS resolution fails after 12.10 upgrade

After my upgrade to 12.10, DNS resolution seems to fail for both local and external addresses. I can successfully ping local and external IP addresses (google.com, at least), but pinging DNS names ...
2
votes
2answers
101 views

In Ubuntu 12.04 can I disable Iptables firewall?

I want to create a minecraft server for me and my friends to connect to (port 25565). I already use ddclient, which updates the external ip so that the data sent to the hostname is forwarded to the ...
2
votes
2answers
5k views

Setting up Ubuntu web server?

I've just purchased a cloud VPS and installed Ubuntu Server 13.04 on it and that is pretty much all of my Linux knowledge. Can someone point me to the best up to date tutorial on setting up Ubuntu ...
2
votes
1answer
2k views

When I try to add repositories, why are ubuntu's keyservers timing-out?

Something is rendering receiving keys from keyserver.ubuntu.com impossible and I'm not even sure where to begin in trying to resolve this. As an example, we'll use the Spotify linux app found here: ...
2
votes
2answers
227 views

Why can't I load this website except on Windows?

http://www.battleswarmzone-.spruz.com/ fails to load on my system under ubuntu, but loads under windows. I can't ping this subdomain either, but spruz.com loads fine. Worse still, even proxies don't ...
1
vote
3answers
1k views

DNS server not responding

From time to times I have to reboot my Ubuntu 11.04 remote desktop. Once it up and I run Cromium browser with many tabs (20 for example) dns server doesn't respond anymore. At beginning I suspected my ...
0
votes
2answers
3k views

How can I use bind9 to use my own custom domain in my LAN?

I'm new to DNS and making a DNS server. I've read through the bind9 server how to (at https://help.ubuntu.com/community/BIND9ServerHowto) and several tutorials online on setting up a bind9 server in ...
0
votes
1answer
7k views

How to setup DHCP Server and Dynamic DNS with BIND? [duplicate]

Possible Duplicate: How to make my pc a DNS server in local network with no-internet access? I have installed the two servers (dhcp & DNS) what i need is to make the dns dynamically ...
0
votes
1answer
2k views

Access a virtual host on a server in VirtualBox directly

The server: Ubuntu 10.10 Server as guest in a VirtualBox (IP 192.168.178.91). Simple Question: I want to access a virtual host named 'example.server' from outside my virtual box by simply using a ...
15
votes
2answers
5k views

Switching a server to static IP from DHCP

I am running an Ubuntu 10.04 server installation and I recently had to switch it from DHCP to static ip. I edited /etc/network/interfaces file and switched iface eth0 inet dhcp to iface eth0 inet ...