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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How to use DNS instead of /etc/hosts? [duplicate]

In /etc/hosts, I can for example input 127.0.0.1 example.com Now I have a nameserver (pdns with postgre-backend), which I want to use in the intranet. So, I tell my dns server, that example.com ...
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15 views

How to setup authenticaton for a DNS server with database users

can any one help me out here, I'm trying to setup a DNS server with authencation so that only ip address of database users will be allowed to use my Private DNS server. Thank you
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1answer
44 views

DNS goes missing with Static IP via NetworkManager

I know there's plenty of posts/threads/questions/tutorials regarding ubuntu's DNS, network manager innards, and changes in the like between versions ~12 to 14-15+. I'm on ubuntu 12.04, and looking to ...
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40 views

EZ-IPUPDATE behind NAT

I have my server behind a cable router which NATs everything at home. My router only works with dyndns, which does not have a free option, and my DNS is Zoneedit. I configured ez-ipupdate, but it ...
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1answer
60 views

Postfix doesnt know own hostname

in my postfix logs I often see that postfix failed to send an email to root@levinus [my hostname] because theres no DNS record for levinus. But in my /etc/hosts is an entry for levinus (--> 127.0.0.1 ...
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1answer
80 views

How do I prevent domains from resolving to a specific address?

When I misspell a domain name, the DNS servers of my ISP provider resolve the domain name to an IP address of a web server that tells you "we're sorry, the address you typed does not exist" together ...
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2answers
97 views

Do you really need to remove DHCP clients for static IP to stick?

The instruction from this link works to change from DHCP dynamic IP to static. But there's a step where it says: You need to also remove the dhcp client for this to stick (thanks to Peter for ...
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1answer
320 views

Cannot access Ubuntu web server site from outside network

So I've set up a LAMP web server on Ubuntu 14.04 server distro and installed owncloud as well as wordpress on it. It's connected to the web via ethernet and connectivity is good as far as I can tell ...
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19 views

lubuntu networking

I have installed lubuntu latest version in my network systems which have 15 systems, problem is when I open my crm page in any of the system only one system get connected to it, remaining systems ...
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2answers
161 views

Can I run a Ubuntu and Windows DHCP / DNS Server together in the same network?

I am just wondering if I can run both windows and Ubuntu DHCP/DNS Server in the same LAN. The Present configuration is Windows 2003 Server AD and Ubuntu DHCP n DNS Server with BINDS. I have proposed ...
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2answers
253 views

change DNS server in a non-persistent way (on the command-line) [ubuntu 14.04 - rescue mode]

is there a way i can change the DNS server on the command-line without having to change anything on the disk? i recently booted into the rescue session and i got an IP address (using DHCP) but no DNS ...
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22 views

would a DNS server help users find my web inside LAN [duplicate]

I have a linux box that works as a server and connects only to a LAN network, with the rest of its clients. If I type the IP address of the linux comp on any client's browser I land on this ...
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20 views

Google Properties don't load on my work network; other sites do

Often, when my laptop is on my work network, some Google properties don't load in FF. The search bar doesn't autopopulate results, navigating directly to www.google.com doesn't work, etc. I haven't ...
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1answer
54 views

make LAN clients find my website through a URL

I have apache2 installed and running. I've been fiddling with the configuration files and also found this: https://httpd.apache.org/docs/2.2/vhosts/examples.html that website I just pasted there says ...
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1answer
191 views

Why won't DNS resolve?

I can't use git clone or even apt-get install because I get a "cannot resolve host" error. They were working before, but I have no idea what changed that broke the DNS resolve. I can't find any ...
2
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1answer
84 views

freshclam warning: “DNS record is older than 3 hours.”

I recently ran the command: sudo freshclam And this was the output: ClamAV update process started at Mon Sep 28 18:45:04 2015 WARNING: DNS record is older than 3 hours. WARNING: Invalid DNS reply. ...
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20 views

Web server & ICMP question

Im am very new here in askubuntu.com and pretty new to ubuntu server system. at our church we have a ubuntu control server which is in charge of internal network(DHCP) and all that related. the ...
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27 views

Ping out but not ping in

I can ping my own ip address and google but none of the host names will work. Does anyone have any advice? this is what it looks like and my DNS is up and running root@ns1:/etc/bind# ping google.com ...
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75 views

how to points my domain name server to my local ubuntu pc?

I have bought one domain now i want to host my website locally in ubuntu desktop as long as my pc gets on my website would run if shuts same and vice versa. So for that i need to configure my domain ...
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1answer
192 views

DNS leak test shows other Google ISPs when I use Google 8.8.8.8 and 8.8.4.4 nameservers

I am trying to fix a DNS leak. I have changed the nameserver settings to use Google's 8.8.8.8 and 8.8.4.4 public DNS servers. However, if I run a DNSleak test it lists the following servers: ...
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1answer
36 views

DNS not resolving Seattle University network

Seattle University doesn't provide any support for linux, although my Android phone appears to work fine. I am able to connect to both the encrypted and unencrypted wireless networks, as well as ...
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1answer
158 views

Chrome and Firefox can not resolve the same host name, dig can

Ubuntu 14.04. I am on a local domain, xxx.local. From the terminal I can use dig and host to lookup many names served from our local dns servers like zzz.yyy.xxx.local. When I type that same host ...
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1answer
196 views

Reduce ntpdate timeout when DNS settings invalid?

I have an issue where ntpdate times out after exactly 80 seconds in the event that DNS is invalid (or in this case, host is stuck behind a firewall). I would like to bring this timeout down to ...
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244 views

Why “hosts:” is set to skip dns by default? (/etc/nsswitch.conf) or How to fix dns resolve

The default hosts: line in /etc/nsswitch.conf is hosts: files mdns4_minimal [NOTFOUND=return] dns After installation I've find out that this is what works. dns must come before NOTFOUND: ...
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25 views

Internet connection issue on Lubunu 15.04

I am trying to get my wi-fi connection back on my HP laptop with Lubuntu 15.04 installed. The issue has started after I changed my internet provider and manually configured wired connection through ...
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23 views

Network Manager not going through 3rd DNS

I would like to know if it is common that Network Manager will not go to 3rd configured DNS to resolve an IP. I have configured 8.8.8.8, 8.8.4.4, 192.168.1.24 When I want to resolve a local domain, ...
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1answer
134 views

Ubuntu 15 dns not working

Got dns probe finished bad config. How to fix this? I have tried sudo rm /etcresolv.conf and sudo resolvconf -u. Disabling an enabling network also doesn't fix that problem. Restarting won't help ...
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1answer
191 views

How can I change Ubuntu server IP Address to web address?

How can I change Ubuntu server IP Address to the web address? For example, the address that I need to access on the browser is 192.168.x.xxx. How can I change to dev.robi.local? Thanks! The ...
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56 views

mail relays to secondary MX record all the time

I have a partner company whose MX records are set as below: abc.com. 20698 IN MX 10 mail1.abc.com. abc.com. 20698 IN MX 90 mail.abc.com. The above ...
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1answer
75 views

14.04 Desktop - how to assign domain to hostname?

Situation : we were - and still are partially - on a domain name (dark.void) we wish to get rid of! Here is the current content of the different networking configuration files in an attempt to switch ...
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212 views

Virtualbox Ubuntu guest cannot connect to internet but can ping host machine

I have Ubuntu 64 bit server installed on a Virtualbox running on Windows 7. I set two adapters to this virtual machine. adapter 1 is host-only and adapter 2 is NAT. Adapter 1 has static ip address ...
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32 views

DNS problems on Ubuntu 14

I am being driven crazy by connectivity problems in my Ubuntu computer. I have no problem when I try to ping, however any browser will load for 5 minutes and not go anywhere, and give me a DNS error. ...
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0answers
154 views

bad dotted quad / DNS

I am trying to redirect a DNS to my VPS (Ubuntu Server 14.04). I am trying to configure the zones of bind. But I have an error I can't fix ... Any Idea ? toto@serveurVPS:/etc/bind/zones# ...
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1answer
113 views

Can't reach certain web site/server via DNS, only with ip

I am having trouble getting to a certain server/website online and also connecting to the server with ssh USERNAME@HOSTNAME. Am using a machine with Lubuntu 14.04. I can connect to the server from all ...
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70 views

Static IP working slow in Ubuntu 15.04

In ubuntu 15.04 I have, in order to have a static IP in my LAN, updated /etc/network/interfaces to: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.1.140 netmask ...
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2answers
140 views

Is it possible to ping your own domain name?

I know that this is probably a stupid question but I really don't know the answer. I have a webserver with two domains sharing the same ip address. I am using nginx with fastcgi and php5-fpm, and I ...
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0answers
43 views

How can I diagnose and fix a DNS issue on Ubuntu 14.04 Server?

I have installed a server install for a LAMP stack, Ubuntu server 14.04. This is done in a virtual machine running under Windows 7. If I run the machine as NAT then all of the internet functionality ...
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83 views

DNS server testing and configuration

You are required to configure and test a DNS server. Configure a DNS server with both forward and reverse lookup. You should configure a domain name zone of .itc514.edu, and a reverse name mapping ...
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15 views

IPForward fail with wlan0 AP + eth0 WWW

I did it: wlan0: Wifi AP (Dhcp) eth0: Internet access I can verify the WWW is joinable by eth0. Clients can connect to Wlan0 AP. It works well if I redirect all traffic to localhost with ...
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54 views

How to perform NAT to DDNS provided ip address using iptables

I have a device connected to the internet via a 3G Cellular link. I can't get a valid static IP address for my connection due to the network operator rules. On the server side, the application which ...
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68 views

Bind9 statistic channels No such Url

Ok,so i'm installed and configured my bind9 --with-libxml2 # dpkg --list | grep libxml2 ii libxml2:amd64 2.8.0+dfsg1-5ubuntu2.5 amd64 GNOME XML library ii ...
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22 views

Determine nameserver to use behind a proxy

I have access to internet only behind a proxy. apt-get works fine but when I do ping google.com I get ping: unknown host google.com. This is not the case when I do ping without a proxy. How can I ...
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1answer
18 views

Test my custom created DNS?

I used VPS Ubuntu 14.04 (x64) to install test environment for my Ruby on Rails development. And I succeed with installing and configuring. Now I also configured DNS on that VPS server, everything ...
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1answer
57 views

Bind on non-recursive mode doesn't work

I installed bind for caching server and recursive mode works well. But Non-recursive modes doesn't work well. Here are option contents of /etc/named.conf (For recursive) options { listen-on ...
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336 views

Ubuntu 14.04 with Gnome 3, Network Manager issue

I have been trying to update the network setting of a fresh install via the GUI but am seeing this error: error editing connection: did not find a connection with UUID '(null)' The Network Icon in ...
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1answer
57 views

Creating 2 DNS names for 2 domains on one static IP - Ubuntu

I have VPS Ubuntu 15.04 and there I have configured DNS for one of my external domains. This is sample of configuration at '/etc/bind/named.conf.local': zone "test.com" { type master; ...
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226 views

dnscrypt-proxy - find the best DNS resolver and update the dnscrypt-resolvers list

I have installed dnscrypt-proxy and the default resolver I have is: resolver1.dnscrypt.eu. Is it possible to find the fastest DNS resolver from the list here: Also I have installed the program from ...
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1answer
69 views

Problem accessing the DNS

I am using rtmpdump to download streaming video. But getting error like this ERROR: Problem accessing the DNS. (addr: __________). if some one can help please reply urgently.
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1answer
295 views

Ubuntu 15.04 server DNS server - private network (no internet access)

Can anyone assist me in setting up a DNS server inside Ubuntu 15.04 server edition (inside VirtualBox)? This is on a private network in an area with absolutely no internet access, so I need to ...
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1answer
68 views

Ubuntu Clients Ignore DNS Server on local network

I currently have a dnsmasq DNS server running on my desktop Ubuntu 15.04 installation. I use it to point to local devices on my network. For example, I have a record linking kerberos.dgourd.com to ...