Domain Name System (DNS) is a service that provides the resolution of host names to IP addresses.

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Host domain name pointer in linux

I setup a Linux server and run a command, host wan ip in terminal and it shows ... domain name pointer mail.domain.com. How do i replace current new mail.domain.com to mail.newdomain.com?
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How can I use an ACL in BIND to forward requests per zone selectively?

I have some zones declared internally as forwards to another DNS, but there is a hefty amount of IP space we do not want to be forwarded in this manner for these zones. These forwards are for very ...
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189 views

Apache Request Hangs For 2 Minutes Exactly

I am experiencing some odd behavior with apache. I have requests that are hanging for exactly two minutes. The request could be one file one time, and then a completely different file another time. ...
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910 views

resolve the server hostname of a dnsmasq server with multiple subnets

I have a self-made Linux router running dnsmasq. It has two different NICs through which clients are connected; one of them has the subnet 192.168.1. and one the subnet 192.168.2.. My ...
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53 views

Does wildcarding significantly hurt BIND Performance?

I have enabled RPZ on my BIND 9.9.4 DNS server and I wanted to be able to wildcard some records in my RPZ zone, but I am afraid of the performance hit this might cause. Does anyone out there have some ...
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Debian machine makes repeated requests to DNS for <gateway_ip>.in-addr.arpa

I recently forwarded all my router logs to my Debian machine. I noticed a repeated entry in the router logs. The entry is: Sep 14 17:07:29 192.168.0.1 [Host 192.168.0.1] UDP 192.168.0.2,38048 --> ...
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102 views

Question about MX records and mail delivery?

Let's say, we have multiple mail servers in DNS records. If someone is sending a mail, the outgoing mail server will check the MX and contact the first server with the lowest cost. If this server ...
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132 views

Communication with MX records [closed]

I have a short question about the topic of MX records. Let's say, we have multiple mail servers in DNS records. If someone is sending a mail, the outgoing mail server will check the MX and contact ...
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135 views

DNS issues when using VPN in Linux Mint

I'm using Windows8 as my host OS, and are running a Linux Mint VM on virtualbox, with its network being virtualized as NAT. I'm using Ciscos AnyConnect VPN to get access to a certain network. The ...
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4answers
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How to set DNS resolver in Fedora using network-manager?

I want to try out Google public DNS. For this I need to change the nameserver address. I know it's in the file /etc/resolv.conf, but whenever I start network-manager, it overwrites the values in that ...
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Can't connect to to internet. Debian Wheezy, pinging DNS address works

I have booted Debian Wheezy from SD card on a Beaglebone Black board. Version: debian-wheezy-7.0.0-armhf-3.8.13-bone20.img.xz, from http://www.armhf.com/index.php/download/ I have set up my ...
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325 views

Process calling getaddrinfo() at boot gets permanently stuck with bad /etc/resolv.conf?

I'm running pianod, a Pandora client/server, on a Raspberry Pi with Arch Linux ARM. I have pianod set up to run as a service at boot. It starts up before the network stack, so getaddrinfo() fails. ...
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2answers
780 views

How to safely reverse dns lookup on ip in a shell script

I'm trying to find out how to take in a hostname and pop out an ip address (reverse dns lookup). I came up with this but I'm not too sure it's safe across different linux distros: nslookup $ip|grep ...
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85 views

Configurable DNS cache for Linux

What I need is to configure a Linux machine, so that when user of that machine goes to www.somesite.com he/she is redirected to, say, 127.0.0.1. What is the best way to achieve it?
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Unix: How to Test Ip Address is resolved to name

Unix: How to Test ip Address is resolved to name. I need to check whether ip address can be resolved to name using DNS entry via shell script. Code: DNS_Lookup() { LOOKUP=$(nslookup $1) ...
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122 views

DNS zone fallback file

I have the following DNS zone(bind): zone "." IN { type master; file "named.root"; }; If this zone directive cannot resolve the address, how can I "fallback" to another file for the same ...
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1answer
390 views

Force local DNS resolution for external hosts

My Environment: *OS:* Angstrom Linux DNS: Bind Current Scenario: User connects to my private offline network. User tries to access google.com, and my box is on a private network therefore they ...
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2answers
3k views

When to use BIND vs internal DNS for Samba 4 backend

The docs say, "Bind as DNS backend is recommended, if you plan setup a complexer DNS setup, than the Samba 4 internal DNS currently made possible." What exactly is the threshold for "a complexer DNS ...
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207 views

How to host a website on personal computer

I want to start hosting my website at my own computer as well websites of my friends too (say mini hosting platform). I learned Debian, Bind9 and Apache for this purpose. On my system everything is ...
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136 views

How to attach my domain with bind in real www

How to attach my domain with bind in real wwwI install bind9, with apache. By God's very grace every thing went smooth. my dig, host, nslookup and ping provide this info: my system ip address: ...
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1answer
1k views

Binding domain name to Apache Virtual host on VPS

recently company I work for has rented VPS. Now i need to have multiple websites hosted on this VPS, that is not a problem, I'v set up virtual hosts, databses, etc. Now i wanted to test it, see if I ...
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How to property configure DNS . . . from a conceptual perspective

I'm not looking for actual tools or techical how to type answers here. I'm in a complex networking environment, and I'm trying to understand the constraints on my choice of a hostname / domain / DNS ...
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226 views

List all DNS Servers, including those pushed by VPN

I want to know which DNS servers are in effect when I run commands like nslookup, dig, host, ping, etc. The general answer is to cat /etc/resolv.conf, or to look at NetworkManager, but that's only ...
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How to configure Unbound to use DNSSEC?

I'm having a local caching DNS server: Unbound: [root@localhost /etc/unbound] cat unbound.conf server: interface: 127.0.0.1 access-control: 127.0.0.1 allow verbosity: 1 ...
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175 views

Define custom DNS server when looking up host

I'm having trouble with my current web host's DNS server which doesn't correctly resolve IP addresses for Baidu. shell_exec('host -W 2 180.76.5.168'); shell_exec('nslookup 180.76.5.168'); Is there ...
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CentOS VPS - Pointing my Domain name to the VPS static IP

I am a Linux Newbie. I have a VPS with CentOS installed at my ISP and I am managing it remotely. Up to this point, I have had shared webhosting on a Linux machine at my ISP where I had CPANEL ...
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270 views

Solaris 11 nslookup reverses ip

From (Solaris 11.1 with current patches, m4000 128GB) syslog: Jun 17 10:06:14 sun-m4k-03 sendmail[4993]: [ID 702911 mail.warning] gethostbyaddr(10.128.4.50) failed: 1 The ip is valid from the ...
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147 views

Always look up non-FQDN domains as .example.com?

When I connect to the company OpenVPN they don't push their DNS to my computer, which means I have to type the FQDN for the hosts I e.g. SSH and HTTP to. Question Is it possible to configure my ...
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138 views

Ubuntu 12.04 resolver setup

When investigating how the DNS setup of my os (Ubuntu 12.04) works, I came to some questions I could not really find on the web. So what I observed was, that ubuntu uses Dnsmasq as a DNS resolver. ...
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1answer
93 views

How can I be sure that access to my home server from my home network is not done via Internet?

As advised in this question: Network file-sharing between Linux and Android, I have decided to use ownCloud to store files on my home cloud server. However, my needs have changed a bit. I want to be ...
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Why `host` and `nslookup` on Solaris 10 resolves hostnames while `ping` and `telnet` does not?

/etc/resolv.conf contains a nameserver that is alive (as reported by the ping command) host or nslookup is able to resolve google.com $ host google.com google.com has address 74.125.228.3 google.com ...
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Configuring DNS resolver failover timeout

We have all of our systems set up to do internal DNS to a local name server and a secondary name server so that in the event the local DNS server is down they should go over the WAN to the secondary ...
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1answer
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Ubuntu server cannot access the Internet: appears DNS related

This is a Drupal website running Ubuntu 12.04 LTS on Linode. The server is just a website. It is not a DNS server or anything else. Here are my issues. It seems they are all related to DNS issues. ...
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Looking up a local domain name without specifying the local DNS server

I've set up a local domain name by creating a zone (by following the steps in this tutorial). Why I look the domain using dig, I get the right results when using the following command: dig ...
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Apache subdomain can not be resolved

<VirtualHost *:80> ServerAdmin webmaster@localhost ServerName domain.no-ip.org ServerAlias www.domain.no-ip.org DocumentRoot /var/www/main ErrorLog ...
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Postfix: 554 5.7.1 Relay Access Denied

My Problem is this: I can send E-Mails from my E-Mail (evolutio@lars-dev.de) to my other Emails like @gmail @web @gmx ... But when I try to send a E-Mail from GMail to evolutio@lars-dev.de I have the ...
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Can't get BIND and NS to work properly [closed]

I just got myself an unmanaged Dedicated VPS from OVH and I don't have a prior experience of setting up servers or DNS servers but I followed a couple of tuts and installed webmin and created NS Zones ...
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1answer
395 views

Why is dnsmasq putting my router IP in /etc/resolv.conf instead of 127.0.0.1?

I'm having DNS resolution issues in various contexts which appear to trace back to my networking configuration. I'm running just the dnsmasq-base installation of dnsmasq on two Linux installations ...
3
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1answer
188 views

Why is resolv.conf spelled without the 'e'? [duplicate]

A curiosity question which google has been unable to answer for me: Why is 'resolv.conf' spelled without the trailing 'e'? I'm sure there's a valid historical reason going back to the early days of ...
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2answers
2k views

Fedora 18: can't resolve hosts

My Fedora 18 machine is having problems with resolving hosts: Could not resolve host: ...; No address associated with hostname] HTTP error on [https://lon.auth.api.rackspacecloud.com/v2.0/tokens], ...
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2answers
569 views

I want to expose “easy” URL's for machines on a home network. Is custom DNS/BIND the answer?

I recently convinced my room mates to cut the cord and go cable free, and they've found it pretty great so far. I'm in the process of setting up a pretty sweet, mostly automated home theater setup ...
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1answer
184 views

How can I configure dnsmasq to resolve based on the source of the request?

I'm trying to get SiriProxy to work whenever I'm connected to my home network by setting up dnsmasq on my router running the Tomato firmware to send all requests to the Apple Siri server to my local ...
0
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1answer
213 views

perform ping test to change dns

I wrote this script to check if my dns server works fine or not, and if not change it. but it gives out error ./dns-ping.sh: line 15: ((: 3 < : syntax error: operand expected (error token is "< ...
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1answer
698 views

Could not resolve host error

I'm using Arch Linux and I have a dynamic ip address with the use of dhcpcd. I can access websites through the google chrome but the problem is that I get 'could not resolve host' error when I run ...
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Host lookup that respects /etc/hosts

Utilities like host and dig let you see the IP address corresponding to the host name. There is also the getent utility that can be used to query /etc/hosts or other NSS databases. I am looking for ...
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3answers
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Can DNS identify hostnames dynamically if they're statically configured?

I've got a small environment of ~40 VMs with static IPs on 12 servers, it would be dandy if I could refer to each VM by name. We have a lot of VMs come and go, so maintaining one static list is a ...
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Ubuntu: How to configure DNS servers in /etc/network/interfaces correctly for resolvconf?

All examples I have seen of configurations (/etc/network/interfaces) showed that you configure an interface and then underneath that gave the dns-* lines such as: auto eth0 iface eth0 inet static ...
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1answer
449 views

How to setup whatever.localhost.dev to resolve into 127.0.0.1 on Ubuntu 12.04?

I'm running Ubunut 12.04 I want *localhost.dev to point to 127.0.0.1. Ubuntu 12.04 comes with dnsmasq-base installed with network-manager. But there is no /etc/dnsmasq.conf. So I installed the ...
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2answers
102 views

How do Apache2 VirtualHosts get resolved?

As I understand it, when you request a url from a website using your browser, it asks the DNS server that the OS is pointing at if it knows the ip address that relates to the dns-name of the server; ...
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Firefox unable to access domains defined in /etc/hosts if Network Manager is disconnected from a network

For developing web sites, I define test domains in /etc/hosts : 127.0.0.1 example.org I can then access example.org in the browsers. However I when the Network Manager is not connected to any ...