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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Strange network issue; works on windows, but not on ubuntu, works on campus wireless, but not at home

I have a broadcom device using dell laptop that can dual boot into windows 7 and ubuntu 12.04 LTS. I have no trouble connecting to the internet using the Windows 7 side, but on Ubuntu firefox and ...
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4answers
7k views

How to make subdomains point to different local IP addresses?

I have a domain name mydomain.com which points to a static IP address. I have configured in my modem so that all request to port 80 of this static IP will come to my local computer 192.168.1.100 (web ...
2
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1answer
643 views

Cannot ping localhost after a half day of uptime

This just started like 4 or 5 days ago. I'm running Ubuntu 12.04 desktop, and after about 12 hours of uptime it seems the loopback device just stops working. If I do an ifconfig, it looks like it's ...
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1answer
2k views

ubuntu 12.04 server doesn't resolve local domain name

After apt-get upgrade this morning, my Ubuntu 12.04 web server does no longer resolve a domain name hosted on it. I also received the error message: "resolvconf: Error: /etc/resolv.conf isn't a ...
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2answers
5k views

'/etc/hosts' , http links are redirecting, but https links are not redirecting

I edited /etc/hosts file and entered below information : 127.0.0.1 test.com //working 127.0.0.1 https://test.com //not working . from the above info, http://test.com is redirecting to ...
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1answer
453 views

DNS not working over DSL

I connect to Internet via a PPPOE connection that i configured manually as below: /etc/ppp/peers/hamyar #hamyar: noipdefault defaultroute replacedefaultroute hide-password noauth persist plugin ...
3
votes
1answer
38k 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 ...
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2answers
1k views

Why doesn't this custom static IP network configuration work?

I installed Ubuntu server 12.04. I configured my network like this: auto eth0 iface eth0 inet static address 121.127.36.164 netmask 255.255.255.0 network 121.127.36.0 broadcast 121.127.36.255 gateway ...
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1answer
2k views

How to address ssh-server with a subdomain for remote access?

I am trying to set up ssh-server on my Ubuntu 12.04 VM (running in VirtualBox on Mac OS X 10.7). I have a domain name, call it foo.com, and I'd like to make ssh available via ssh to linux.foo.com. (I ...
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2answers
4k views

resolv.conf containing 127.0.0.1

I have just installed Ubuntu 12.04 on a dual-stack network (with managed IPv6 configuration). I would like to verify if the DNS resolver options received from DHCP and DHCPv6 servers are correct. ...
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1answer
220 views

Setting up private nameservers

I am wanting to setup private nameservers; like ns1.domain.com & ns2.domain.com and I am wanting to make my ubuntu server to point these nameservers to this machine. So now to manage DNS for a ...
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1answer
3k 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 ...
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0answers
44 views

Resolve specific IP addresses to localhost in 12.04 [duplicate]

Possible Duplicate: How do I add a DNS server via resolv.conf? I used to simply add static DNS entries in my /etc/hosts file. This is not working with 12.04. How does one add static DNS ...
2
votes
1answer
20k views

How to setup DHCP Server and Dynamic DNS with BIND?

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 ...
2
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1answer
3k views

vpnc connects but does not set up nameservers in /etc/resolv.conf

I am not a big Ubuntu guru, running 12.04 LTS version. I need to connect via vpnc from university to the work network. Logging in works fine, however I cannot reach any machine behind the VPN. Also, ...
1
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1answer
477 views

Why can't I ping “http:/ushou-appeng01/ufm/…”? [closed]

I am not able to ping http://ushou-appeng01/ufm/Firmware/packages in Kubuntu 10.04. This link is accessed in my ltib file. When I tried to ping this link from the bash shell, it gave me a "Host Not ...
1
vote
1answer
2k views

DHCP is mangling my PTR records in DNS

I originally posted this in LinuxQuestions http://www.linuxquestions.org/questions/linux-server-73/dhcp-is-mangling-my-ptr-records-in-dns-4175412344/ without much luck, so I'll try here. DHCP is ...
1
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1answer
202 views

some programs not resolving hostnames

Ubuntu 11.10, Kernel 3.0.0-20.34 Both Chromium and Firefox are stuck "waiting for www.whatever.com" to load until they time-out. Both of these browsers can load these websites if I navigate to the ...
1
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1answer
310 views

wired resolves dns but wireless dont

My wireless won't resolve dns but my wired connection does. I've tried: $ sudo /etc/init.d/networking restart and: $ sudo dhclient -r $ sudo dhclient as I saw at that question. But it didn't ...
3
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5answers
3k 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 ...
2
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1answer
620 views

How do I create a psuedo-domain through bind on Ubuntu 12.04?

I've done some prerequisite reading on DNS and BIND via O'Reilly's book. My goal is to have a local DNS server (i.e. seldon.foundation) that resolves local names (i.e. *.foundation) but forwards the ...
1
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1answer
211 views

Domain resolution - local first then external

I would like to know how I can configure my dns settings so that domain is resolved locally first, then if not resolved it goes to external DNS. I had this working before, I am using Ubuntu through a ...
56
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5answers
167k 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 ...
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4answers
4k 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 ...
17
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2answers
36k 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
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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
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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
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6answers
20k 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.
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2answers
19k 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
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1answer
308 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 ...
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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
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7answers
174k 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
36k 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
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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
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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
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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
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1answer
370 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
631 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
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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
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4answers
48k 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
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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
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1answer
491 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
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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 ...
17
votes
4answers
27k 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
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1answer
401 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
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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
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1answer
526 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 ...