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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Need help with Mail Server on Ubuntu

I am running Ubuntu 12.04 with nginx I do not have name servers like ns1.mydomain.com neither I have mx records I am using cloudflare for nameservers and then point it to my servers IP. I have ...
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1answer
108 views

How to use custom DNS server for selected domains only?

There are quite few nice DNS service providers that do region unblocking and advertisement blocking. But I'm not too fond of sharing all my DNS queries with them. How I can use their DNS services ...
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44 views

Internet does not connect to anything other than skype and steam chat

My internet has been unable to connect to anything other than the skype chat system as well as the steam chat. Any connections through chrome return: Error code: ERR_NAME_RESOLUTION_FAILED I've ...
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24 views

How to easily install mail server in ubuntu 12.04 [duplicate]

Okay I have been trying for the past hour and had to reinstall the OS because it would not turn on anymore. I REALLY need help I have the domain domain.com and I can edit the DNS on the host Now I ...
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842 views

How do I set up a reverse dns on Ubuntu 12.04 VPS

As far as I can remember when setting up my VPS and mail server on it, I had configured the mail server correctly. However, a few of my clients get SMTP errors, host mx1.zonnet.nl[62.58.50.9] ...
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34 views

random connection with virtual dns!

First of all, this scheme worked normally on Debian. I have CentOS installed via VM on Ubuntu. And there are DNS (Bind) and Apache on CentOS. There are also sites like: 1.mydomain, ..., 10.mydomain. ...
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2answers
1k views

How to flush DNS in Ubuntu 13.10?

We recently moved our website to a new server. But after changing the NS (name server) records, I can't access my website. The hosting provider said we need to flush the DNS settings in order to see ...
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22 views

Configuring Name servers on 12.04

I want to create nameservers on my ubuntu 12.04 dedicated server by name servers I mean ns1.mydomain.com ns2.mydomain.com I am following this guide but it is bit confusing for me as I have never ...
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62 views

Intermittent internet name resolution

I have a problem with name resolution (I believe). I have recently installed LXLE 12.04.3. When I search for updates, I get a number of "something wicked happened" responses and it can't find all of ...
2
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1answer
9k 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 ...
7
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2answers
40k 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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1answer
1k views

ping: unknown host

Since few days, my dedicated server (Ubuntu 13.04) is no longer able to ping or connect to my NAS through DNS (hostname -> kr1.synology.me ) . The IP address ( 178.83.88.248 ) address against , is ...
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1answer
647 views

Can't resolve windows domains in local network

I've installed ubuntu on my computer at work because I think it is a perfect system for work which I do but I got some issues. I can't resolve domains from windows DNS server. Basically, we have two ...
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2answers
140 views

How may I restrict accesing apache using server IP address?

I have a server. I installed and configured Virtualmin/Webmin on it. Also I added three domains and configured almost 100% correct all DNS records. My big question is how I restrict accessing website ...
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2answers
142 views

DNS/mail confusion “No MX or A records”

I'm attempting to send mail from a remote email account to my postfix smtp mail service on my local network. Everything works fine on the local network and users can freely exchange mail between one ...
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1answer
45 views

Correct DNS records?

I just got a VPS (2 CPU, 2 Gb RAM, 40 GB SSD). I've downloaded and configured Virtualmin/Webmin. I have two domain names nedegroup.com and nutrizzio.com registered through godaddy. With ...
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1answer
46 views

Bind 9 problems

Can anyone evaluate my bind zone files and tell me where I'm going wrong? This is my first time writing zone files, so something is probably wrong. I'm using Bind9. After I write these zone files, I ...
2
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0answers
71 views

How to access Amazon EC2 instance from Ubuntu 13.10?

I have an Amazon EC2 (Windows) instance which has been created for me and I have public DNS, public IP and the public key. I would like to RDP to this instance from Ubuntu 13.10. I have recently ...
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2answers
36 views

How do I tell my internal IP to send to my external IP?

I have set up everything necessary for a minecraft server, I have a DNS client with ddclient which is sent from helloworld.dyndns.org to my external ip I have an static internal IP but there is a ...
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2answers
634 views

Ubuntu Bind9 set up and resolv.conf

I found this tutorial the best I've come across and it works! Well done although I can't vote and comment on it due to my site privilege as yet. How do I do a complete BIND9 DNS Server Configuration ...
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0answers
543 views

How to host a website using Ubuntu 13.04 on my local machine

How do I do a complete BIND9 DNS Server Configuration with a hostname? Thank You so much for this wonderful answer. Although the talk here had been more on the lines of setting up a home based server ...
0
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1answer
57 views

How do I make a DCHP server?

I want to finish making a minecraft server (TCP/UDP) I already have a system that uses a private ip of 192.168.0.9 And a DNS on it that uses the public ip of 2.220.217.108, then redirects to it from ...
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1answer
134 views

How do I setup BIND9 and VirtualBox so that my local machine can access my domain names?

I have a complicated setup. And it makes me a bit confused about how I should setup my server, BIND9, and my Mac OS X. So here it is. I have a Mac that is connected to the internet via WiFi. I have ...
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0answers
114 views

How could I set the Apache DNS?

I have an Ubuntu Server 13.10 and I think that I'm having problems with the Apache/PHP DNS. The computer has a perfect connectivity. I can send mails from shell with PHP, but I can't send from the ...
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1answer
83 views

Host purchased domain name in apache2 ubuntu server

I have been looking for a solution to this for months with no luck so here goes. I installed the Ubuntu server 13.04 (since upgraded to 13.10) on an old dell e510 and installed apache2. Also I ...
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0answers
77 views

Setting up Ubuntu for Netflix DNS

I've got a server in the U.S. running Ubuntu 12.04. I'm located in Denmark. Is it possible to setup my Ubuntu server as DNS server, so I can use Netflix with U.S. content? I've read it should be ...
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188 views

Network starts slow on Ubuntu 13.10 start or resume

I have this laptop (ThinkPad X1 Carbon) with Windows 7 and Ubuntu 13.10 dualboot. Recently upgraded from Ubuntu 12.10. The good thing about this upgrade is that Ubuntu 13.10 starts very fast compared ...
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0answers
77 views

Squid error on bind9 start

I'm getting the following error after a bind9 update when I restart bind9 on my 12.04 LTS server: root@server2:/etc/bind# service bind9 restart * Stopping domain name service... bind9 ...
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0answers
45 views

Postfix fails to create Maildir

I'm configuring a virtual squirrelmail for a school assignment. Now I configured a dns server and all my dig's and nslookups succeed. I was also able to add a user in terminal and send an email from ...
0
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1answer
44 views

How can I specify or query the order DNS servers will be queried?

For some reason I am not hitting the DNS server I am expecting to hit. I have a wireless connection with a VPN on top of it. I have set both of the connections to use a specific set of DNS servers ...
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0answers
53 views

Network Problems after installing wireless USB Adapter

some time ago I tried to install an Edimax 150Mbps Wireless IEEE802.11b/g/n USB Adapter for my Lenovo T60 for better wifi performance. It didn't really work out properly, at least I had the feeling ...
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0answers
278 views

BIND9 dnssec issue

Im getting a lot of these errors in syslog Jan 13 06:43:22 sgdns01 named[14352]: error (no valid RRSIG) resolving 'variety.com/DS/IN': 165.21.83.88#53 Jan 13 06:43:34 sgdns01 named[14352]: validating ...
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3answers
680 views

DNS Resolution fails, and /etc/resolv.conf isn't persistent, how can I force the use of certain DNS servers?

I have this persistent and annoying issue. When I first boot up, my desktop can't resolve any DNS names unless I edit the /etc/resolv.conf file and remove the entry for name-server 127.0.0.1 and ...
0
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1answer
289 views

Dynamic DNS advice for a home server on a .co.uk domain

I have the following setup: A home server running Ubuntu Server 12.04 A D-Link DSL-2780 capable of Dynamic DNS routing to www.dyndns.org, www.no-ip.com, zoneedit.com A domain purchased with ...
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0answers
1k views

Can't connect to internet on Ubuntu 12.04.3 Server

It's basically a fresh install. I used sudo vim /etc/network/interfaces and set up a static IP. I've check multiple times that my IP was within my network. Next I used sudo vim /etc/resolv.conf to ...
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1answer
77 views

Is it possible to setup multiple Virtual Hosts with one ip/domain?

Is it possible to setup multiple Virtual Hosts with one ip/domain? We have a single domain (example.com) pointing to our server at ip (123.123.555.555). At location 123.123.555.555 we require the ...
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0answers
68 views

dig and host queries not working on primary BIND 12.04.3

I have followed the guide on this site to configure BIND as a Primary server, it was all going fine and I was ready to make it live, but am now getting these errors when testing against zones on the ...
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0answers
71 views

Outgoing network connections fail after a few seconds

I just got back to my university and discovered that Ubuntu 13.10 has issues maintaining network access now. After a minute or less of proper connectivity, I lose the ARP entry for the gateway and my ...
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0answers
27 views

Detailed document for dns-search in /etc/network/interfaces?

I don't find a detailed document of 'dns-search' in /etc/network/interfaces. Does anybody know where to find the detailed document? Thanks.
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0answers
70 views

Ubuntu 12.04 is burying our Infoblox with DNS requests

I've got 80 computers that I've installed Ubuntu Precise on. However, when I turn them on, they pound out thousands of DNS requests constantly and bury our Infoblox DNS server - just those 80 ...
0
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0answers
50 views

avoiding unnecessary DNS lookup

i have added few host files in my /etc/hosts but still DNS is querying those files. i have already tried /etc/nsswitch.conf hosts : files dns also /etc/host.conf: order hosts,bind but still its ...
0
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1answer
1k views

Set fully qualified domain name on EC2 instance

I am trying to set a fully qualified domain name on EC2 instance. I have set CNAME entry in Route53, so when I go to sync1.staging1.mycompany.net, it resolves to the correct instance. What I have ...
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0answers
44 views

Ubuntu12.04 dns resolve error [closed]

I have two dns nameservers in my /etc/resolv.conf file: nameserver 10.10.255.3 nameserver 10.10.103.123 I configured a domain name "*.cloudstack.cf.test" in dns nameserver 10.10.103.123. Then I use ...
0
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0answers
165 views

Hunting down weird network activity

I am in a hunt, I noticed in Network Monitor that there is constant network traffic over the ppp0. ppp0 is my 3G dongle. Above is what I see hours after hours with all foreground and background ...
0
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0answers
205 views

How to dynamically switch public IP of my VPS (with multiple IPs)

I have VPS with 7 IPs, running Ubuntu 12.04. You can see output of my ifconfig command here at picture: if config output Now I want to run php script under the different public IP each time. For ...
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0answers
59 views

Network DNS problem

I have Ubuntu 12.04 LTS and Windows Server 2008 with DNS server and AD ,both installed on VirtualBox. Firstly I want to ping my domain from Ubuntu host. To do this I configured ...
2
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1answer
1k views

Screwed up DNS settings in 13.10

When I run nslookup internal.foo.com I get Server: 127.0.1.1 Address: 127.0.1.1#53 ** server can't find internal.foo.com: NXDOMAIN For some reason, I am not getting the ...
0
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1answer
236 views

Wifi Hostspot setup for Cable Modem Connection

I have a broadband connection through my ISP (Hathway), using a cable modem. I wish to share the internet connection to my laptop, and the phone. Refer to this configuration guide at 12.10 Wireless ...
0
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2answers
167 views

setup norton dns in ubuntu 12.04

I want to setup Norton DNS for my Ubuntu 12.04 for all network connections? How can I setup the DNS servers? The DNS are: Preferred DNS: 199.85.126.20 Alternate DNS: 199.85.127.20
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2answers
2k views

No internet connection (DNS server address is Router address)

My internet connection in Ubuntu 13.10 doesn't work. I can use IP addresses to open websites but not URLs. The DNS server that I connect to is the IP address of my Router. When I connect to the VPN of ...