Domain Name System (DNS) is a service that provides the resolution of host names to IP addresses.
0
votes
1answer
23 views
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 ...
4
votes
5answers
2k views
/etc/resolv.conf changes during reboot
My ISP asked me to use custom nameserver settings. I have placed these in /etc/resolv.conf. Unfortunately, every time I reboot the computer, the contents of this file is changed. To connect to the ...
0
votes
1answer
150 views
Opendns setup failed. How to fix it?
I have problems trying to configure OpenDNS. I have contacted OpenDNS support but they did not answer. I cannot access websites like Twitter and Facebook.
I tried welcome.opendns.com (did not ...
1
vote
2answers
141 views
bind9named binary missing - not starting
I have just compiles and installed BIND 9.9.1-P1 on Debian 6.0 as the version in the repositories is too old for Samba4, and am getting the said error. I have been looking for source for named, but ...
0
votes
1answer
788 views
unable to start named service
Whenever I try to run the named service, I get the following even though my permissions and folder ownership is all fine:
[root@f13 ~]# service named start
Starting named:
Error in named ...
1
vote
0answers
26 views
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 ...
1
vote
0answers
421 views
centos 6, hostname won't resolve, dns issue, loop detected
I've searched everywhere and tried all the suggestions that I've seen, but I just can't get this to work now (it was working before). This is the first time I've ever installed a test server that I ...
2
votes
1answer
483 views
Static IP address shifting to 192.168.1.251
I have a system with a static IP address of 192.168.1.150. I configured /etc/network/interfaces manually (i.e. without using NetworkManager.) It is a web server hosting three sites. I am having ...
0
votes
1answer
85 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 "< ...
1
vote
1answer
161 views
Why is sendmail appending my hostname to unknown destination domain?
I am testing the handling of mail bouncing. When I send a test email to a bad domain, for example: eric@blahblahfail.org, I get the following error in my log:
SYSERR(root): ...
3
votes
0answers
59 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 netmasq-base installation of netmasq on two Linux installations ...
0
votes
0answers
21 views
How do I setup DNS names and static IPs for an Ubuntu virtualbox? [migrated]
I have Ubuntu installed on VirtualBox, on top of a Windows 8 host. How can I setup a static IP and DNS name for this virtual machine that other virtual machines will see?
2
votes
1answer
64 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 ...
1
vote
1answer
260 views
Command/scripts to check the Reverse DNS Lookup time
I am working on a project in which one master communicates with numbers of slaves. For that it has to make connection with hosts in network. But sometimes it hangs.
I think that the reason behind is ...
2
votes
4answers
2k views
How to overcome libc resolver limitation of maximum 3 nameservers?
Suppose I work in environment with number of domain changes and slow propagation.
I want to test domain configuration immediately after setting change but the propagation is slow.
So I want to add ...
1
vote
1answer
113 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 ...
2
votes
1answer
90 views
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 ...
1
vote
2answers
126 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], ...
2
votes
2answers
80 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 ...
1
vote
1answer
36 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 ...
2
votes
1answer
69 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 ...
4
votes
4answers
145 views
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 ...
2
votes
3answers
39 views
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 ...
2
votes
0answers
127 views
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
...
1
vote
2answers
49 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; ...
0
votes
0answers
308 views
Bind DNS rate-limit and values for responses-per-second and window
In my DNS server's named.conf I see
rate-limit {
responses-per-second 5;
window 5;
};
What does this actually mean? And can it cause DNS clients problems?
Is this ...
1
vote
1answer
68 views
Method to perform DNS lookup step very quickly during wget
When I download any document from internet using wget. It shows maximum amount of time consumed in getaddrinfo().
I know getaddrinfo() used for DNS lookup.
Tell me any method, so that this time is ...
2
votes
2answers
1k views
How to flush local DNS cache in CentOS
(I am aware that googling this question gives me tons of stuff, but literally none worked) I'm looking for a way to flush the local DNS cache on a Centos 6 system, it is not running any DNS server or ...
1
vote
1answer
128 views
No DNS on Debian wifi after unplugging the DNS cable
I have installed wheezy Release Candidate 1 to my old laptop (Benq Joybook A52) right now, and I have some problem with my wireless card (Atheros 5006). It can actually see the wireless networks, I ...
1
vote
0answers
92 views
Setup of DNS zone with secure zone updates
OS: Linux Mint
Can someone please details the steps or point to the right material to achieve the below.
run a dns server with a zone for a local domain?
able to add dynamic entries to the dns zone ...
0
votes
2answers
83 views
How to detect particular system call called or not in a whole workflow?
EDIT No. 1
My task is mirroring , i.e., copying updated data from master server to all mirrors, by using rsync and rsh. But during rsync and rsh, I found some delay. My thinking is , the reason for ...
2
votes
1answer
96 views
Incoming/Outgoing seperation for VPN
My situation is that I want all my outgoing connections from my Debian server to pass through a commercial VPN service I've subscribed to, but I still want to run public-accessible services on this ...
0
votes
1answer
101 views
Server returning 'Not Found' for “www.host.com” but not “host.com”
My server is returning the correct paths for all of my domains as long as they are not prefixed with www. The following is one of my domains in it's simplest form:
<VirtualHost *:80>
...
2
votes
1answer
74 views
DNS cache for wget
I want wget to use a global DNS cache, not just in memory for the current instance.
The wget manual mentions
--no-dns-cache
Turn off caching of DNS lookups. Normally, Wget remembers the IP ...
31
votes
8answers
30k views
How can I resolve a hostname to an IP address in a Bash script?
What's the most concise way to resolve a hostname to an IP address in a Bash script? I'm using Arch Linux.
0
votes
2answers
104 views
How to make dns resolve faster
I changed name server of one domain.
Then I flush dns
root@host [~]# /etc/init.d/named restart
Stopping named: [ OK ]
Starting named: ...
2
votes
1answer
252 views
“Fake” DNS for a single host
I am running a bind9 dns server at my home network, serving for all my internal servers in my domain local / 192.168.x.x - one of those, extweb.local 192.168.1.33 is also visible from the internet as ...
4
votes
3answers
4k views
How to create a custom dynamic DNS solution?
You all probably know commercial dynamic DNS providers like dyndns.org or no-ip.com.
But how to create a similar service for just a handful of machines?
What server software would be best suited for ...
9
votes
3answers
9k views
How to clear DNS cache on DD-WRT
How can I clear the DNS cache in DD-WRT on my router?
DD-WRT uses the dnsmasq daemon.
4
votes
1answer
80 views
Alternative to DNS for internal servers
I am setting up my first network at work. All the servers are running CentOS 6.3 and have statically assigned IP addresses.
For example:
server1 192.168.0.101
server2 192.168.0.102
I want to be ...
1
vote
2answers
110 views
Name Lookup takes a long time
I was using a script that uses curl. Quite often curl fail.
The error is name lookup timed out
I tried to ping google.com and and other sites. Indeed dns (or whatever do the translation from domain ...
0
votes
2answers
198 views
How to test DNS speed?
I am using google open DNS now.
I want to test it's speed. How can I?
I can ping and see that it gets faster. I need some faster way.
0
votes
0answers
872 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 ...
2
votes
2answers
101 views
Rebuilding sendmail on FreeBSD application server after adding new activedirectory domain controller to network
In the process of adding a new ActiveDirectory domain controller to our network, we decided to rename the domain from "domain.local" to "domain.priv." I scoured all parts of our application server for ...
9
votes
3answers
4k views
What DNS servers am I using?
How can I check which DNS server am I using (in Linux)? I am using network manager and a wired connection to my university's LAN. (I am trying to find out why my domain doesn't get resolved)
1
vote
1answer
110 views
Adding multiple sites at once to forward-zone of Unbound?
The usual format for Unbound forward-zone is
forward-zone:
name: "imap.gmail.com"
forward-addr: 8.8.8.8 #googleDNS
forward-addr: 8.8.4.4 #googleDNS
for example. Is it possible to add multiple ...
4
votes
1answer
356 views
Configuring ssh fingerprints on dns to replace known_hosts fails
The SSHFP records were generated on the ssh server as follows and then added to the zone in bind:
$ ssh-keygen -r www.test.us.
www.test.us. IN SSHFP 1 1 ad04dfaf343a93beeb939eed1612168f7eadbed7
...
8
votes
3answers
2k views
What is the point of sshd “UseDNS” option?
I know what it does, but i don't know why. What attack(s) does it prevent ?
Is it relevant for all kind of authentication methods ? (hostbased, password, publickey, keyboard-interactive ...)
2
votes
2answers
3k views
understanding DNS in ubuntu 12.04
I have Ubuntu 12.04 installed, and also use unbound and usually use openDNS as my DNS server.
When I run dig google.com say I get SERVER: 127.0.0.1#53(127.0.0.1). What exactly is this thing listening ...
1
vote
2answers
497 views
Change default DNS on openvpn connect
I am using Network Manager on Ubuntu 12.10 to connect to an openvpn server. The connection works without problems. However, when I connect, I would like to change my default DNS server to a server ...
