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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16
votes
2answers
34k 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 ...
0
votes
1answer
1k views

Kubuntu 12.04 - DNS Issues

Starting yesterday (6/11/12), I've been having many network problems. When requesting a page in chrome, the page hangs on "Sending request" and then will eventually timeout. I'm within a VPN that has ...
2
votes
2answers
2k views

How to opendns on router with dynamic ip

OpenDNS is almost completely useless with a dynamic ip and most people have dynamic ip addresses. There isn't even a decent client for Linux to update your IP. There is a script you can install ...
1
vote
1answer
3k views

Mail Server not working?

I am trying to setup mail server since a long time but as I am new to Linux I have unsuccessfully configured it to the best as I could but now I need assistance. I have installed it using the links ...
24
votes
6answers
19k 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.
4
votes
2answers
18k views

How do I allow all possible IPs for Gmail servers through my ufw firewall?

I am currently using the following rule: ufw allow out from my_local_ip to any port 587 This is a little too lax for my liking. I would like to tighten it up and restrict it to only gmail's smtp ...
2
votes
1answer
303 views

How to auto-install runlevel control for existing service/daemon?

Need to install a service/daemon (in this case bind9, a DNS service) runlevel control, aka "rc" control (/etc/rc*.d and such). bind9 came pre-installed on my 11.04 system, but without aforementioned ...
1
vote
2answers
3k 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 and nslookup correctly return their details. What do I need to do ...
21
votes
7answers
167k 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 ...
8
votes
1answer
35k 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 ...
1
vote
1answer
2k views

How do I stop OpenDNS from redirecting single-word searches?

Every time I search for a single word in the Firefox address bar I am redirected to OpenDNS Guide search rather than my default search engine. How do I stop this? I have tried changing Keyword.URL in ...
8
votes
3answers
3k views

DNS sometimes works, but it is very slow.

I am having DNS problems since upgrading to Ubuntu 12.04 (Precise Pangolin) from Ubuntu 10.04 (Lucid Lynx) yesterday. DNS sometimes works, but it is very slow. I have read the blog post DNS in ...
5
votes
2answers
15k views

Upgraded server to 12.04 DNS no longer working

I cannot ping/reach any website/service by name (e.g. ping google.com). I could temporarily fix this by changing 127.0.0.1 to my router in /etc/resolv.conf But that file gets overwritten. How can I ...
0
votes
1answer
364 views

Can't view URLs that contain hyphens before them

Some Tumblr URLs contain hyphens before them (-example.tumblr.com). In Windows, I was able to view these URLs without any issue. In Ubuntu, I've tested it in Chromium, Chrome, Firefox, and Opera so ...
2
votes
1answer
623 views

How to connect to Ubuntu Server using external IP

I do not have a static IP because my external rarely changes. How can I connect via SSH and FTP via an external IP address.
2
votes
3answers
3k views

Where can I find the DNS cache?

I just want to see how IP addresses mapped to domain names in my local machine. Is it possible? Thanks. BTW, it's just for fun.
3
votes
1answer
2k views

Virtualbox: resolvconf in ubuntu 12.04 host breaks DNS in WinXP guest

[x-post to vbox forums] Virtualbox: Ubuntu 12.04 host, WinXP SP3 guest. The recent change in DNS handling in Ubuntu 12.04 is described here. It means that a NAT'ed WinXP host will receive a ...
33
votes
4answers
47k 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 ...
7
votes
2answers
6k views

How to add some additional DNS search domains without ignoring the ones returned by DHCP?

Please provide: correct location to add my custom domain search option (preferably appending it to the DHCP list, instead of prepending) command to run to make the settings effective Note: do not ...
2
votes
0answers
358 views

/etc/resolv.conf managed by NM? [duplicate]

Possible Duplicate: How do I add a DNS server via resolv.conf? I discovered (with great disappointment) that in 12.04 the file /etc/resolv.conf no longer contains the real nameserver IP, ...
2
votes
1answer
482 views

DHCP server doesn't assign network dns to other hosts on my network

I had a problem with my DHCP but I managed to fix it. Now the network starts but I have a problem with DNS. Clients in the network don't get any dns from my DHCP. My network works as follow my I ...
11
votes
3answers
13k 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 ...
16
votes
4answers
26k 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 ...
0
votes
1answer
396 views

Which DNSExit client to download for Natty (11.04)? Rpm or Deb?

I have an Ubuntu 11.04 server set up to host some websites and I have a dynamic IP address. I am using DNSExit.com to handle the DNS routing to the IP address and would like to install their DNS ...
6
votes
4answers
16k 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 ...
0
votes
1answer
525 views

Different nameservers for different networks

I use Ubuntu 12.04 on my work laptop. Currently I live abroad and I only have this one computer, and I take it home after work to use as my personal computer. The problem is that the nameserver used ...
8
votes
3answers
4k views

Cannot resolve custom domains when VPN is up

I just upgraded to 12.04 from 11.10, and now I can't resolve custom domains over my VPN (e.g. *.dev.local). It worked splendid before the upgrade. Both my /etc/resolv.conf and route -n looks exactly ...
8
votes
2answers
23k views

How can I host a domain/website on my new VPS?

I am an average Ubuntu user and currently i decided to strengthen my knowledge in Ubuntu. Since i am a web developer, lately i decided to setup my own web server powered by Ubuntu. I just bought an ...
1
vote
5answers
2k 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 ...
2
votes
3answers
795 views

problem loading internet pages

I have installed ubuntu 11.10 and when on firefox i can get onto google or google earth and even gmail.But it wont connect to amazon or ebay or bbc or itv homepage.It only seems to like google I have ...
1
vote
2answers
601 views

Jquery website is not opening in UBUNTU but in XP, Everything is fine

I know it is weird, But I just discovered this, jquery.com is not opening in my ubuntu firefox or other KDE browser and hence many sites that copy codes from code.jquery.com also hanged. Is there any ...
0
votes
0answers
166 views

Why is Windows host unknown when pinging, but is resolved by nslookup? [duplicate]

On my linux host I try to reach the windows host in the LAN (wifi). If I try to ping that windows host by its name, I get unknown host. If I query in nslookup, then I get valid IP. VNC also refuzes ...
1
vote
2answers
87 views

Network Problem While Reinstalling Grub

I'm trying to reinstall grub on a second disk, following the instructions at Purge & Reinstall Grub. After doing sudo chroot /mnt, when I attempt apt-get update, I get lot of failed to fetch ...
0
votes
1answer
663 views

Dynamic Bind9 + DHCP

i have been working on setup a server for my internal network, so far i have a working isc-dhcp-server that can upgrade a chrooted BIND9 (on the same machine), i need to add some static entries on the ...
0
votes
1answer
3k 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 ...
0
votes
1answer
745 views

How do I change a machine name in DNS

I'm trying to change my computer's name in DNS so that others on the same subnet can refer to it by its new name - however, whatever changes I make in /etc/hosts and by using 'hostname' to use the ...
1
vote
1answer
773 views

resolv.conf auto reset by dnsmasq after install libvirt-bin

After I install libvirt-bin and ubuntu-virt-server, etc., my resolv.conf gets overwritten by dnsmasq about every hour. I haven't installed network-manager and resolvconf. When I search for dnsmasq I ...
3
votes
3answers
2k views

DNScrypt proxy not working [duplicate]

I've installed DNScrypt proxy from https://github.com/opendns/dnscrypt-proxy/downloads and installed it under Ubuntu 11.10 x64. I started the proxy by sudo /usr/sbin/dnscrypt-proxy --daemonize ...
0
votes
1answer
646 views

Use local network while VPN'd into another network

So I'm at work and I VPN into a remote network. Both networks have their own DNS servers that have hostnames that resolve to internal IP's. I've set it up in network manager so I can ping internal ...
1
vote
2answers
4k views

VirtualBox Ubuntu Server with DNS using dnsmasq

I just want to have a local server inside my VirtualBox that offers DNS functionality like www.example.local => 127.0.0.1. My host operating system is Ubuntu 11.10 and guest is Ubuntu 10.10. On my ...
0
votes
1answer
438 views

localhost subdomain wildcard

I'm trying to have *.localhost pointing at 127.0.0.1. I read this post which is quite recent and looks promising but dnsmasq can't bind port 53: * Starting DNS forwarder and DHCP server dnsmasq ...
8
votes
6answers
8k 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. ...
8
votes
7answers
31k views

How to get the hostname from a DHCP server

I want Ubuntu to get the hostname and DNS name from a DHCP client. The default installation of Ubuntu 11.10 (Oneiric Ocelot) does not do that. The same question was asked and is unsolved on ...
0
votes
1answer
662 views

How do I replace a cable modem router with my own server as DHCP?

My ISP gave me a really crappy router-modem-combination that lacks basic features. For instance you can't assign a constant ip to the mac adress of a client PC. I run a server for my home ...
0
votes
4answers
2k views

why is chrome resolving domain names differently than ping which is resolving differently than ssh?

When I go to me.com in chrome it tells me that domain can't be found. When I go to me.com with ssh, it connects to that server. When I try to ping me.com it pings localhost. I want me.com to ...
0
votes
1answer
872 views

How to bind all the subdomains to 127.0.0.1?

I have a domain test.dev bound to 127.0.0.1 in /etc/hosts. How can I bind all the subdomains, e.g. any.th.ing.test.dev to 127.0.0.1 as well?
2
votes
1answer
91 views

Login for internet use

How to protect internet access using username and password. I mean that i need a situation, say when anyone opens a browser and trys to go for any site it would redirect to a login page for ...
3
votes
1answer
271 views

DNS and VPN issues

I recently purchased a year contract for a KVM 512MB VPS running Ubuntu 11.04. I'm having some issues setting up some things on it though - two in particular that I just can't for the life of me ...
5
votes
0answers
386 views

How can I change DNS servers? [duplicate]

Possible Duplicate: How to change the DNS name server? I have a Ubuntu 11.10 machine, and I'd like to change my DNS servers. How do I do this?
2
votes
1answer
725 views

Is there any easy way to trace a route in ubuntu?

Is there any easy way to track the route that an request takes in Ubuntu? For example, tell me what the DNS servers are, which servers it redirects through before reaching the final page, etc. Is ...