DNS stands for the Domain Name System, a hierarchical, distributed database where the keys are domain names.

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2
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2answers
4k views

Updating GoDaddy DNS from linux

I have the following setup: A domain registered with GoDaddy A plug computer running ArchLinuxArm with a dynamic public IP Updated Domain in GoDaddy DNS Manager to point to public IP of plug ...
0
votes
1answer
82 views

Access libvirt+KVM virtual machines with DNS

I have an Ubuntu Trusty machine running KVM + Libvirt to manage small virtual machines, and using the standard NetworkManager to connect to regular networks. I want to be able to access the virtual ...
-1
votes
1answer
12 views

Exim4 E-mail server in Azure can not receive emails [on hold]

I'm running one VM in one cloud service, the system of this VM is Linux, and it runs Exim4 e-mail server. The server can send e-mails, but when people want to send the e-mail back, it got this ...
-1
votes
0answers
34 views

from gmail -> Our system has detected that this 550-5.7.1 message is likely unsolicited mail.

I installed opendkim and configured it on my mailserver. every test including http://dnsviz.net/d/nyctelecomm.com/dnssec/ and mxtoolbox was returning a perfect rating. Then today, without a restart ...
1
vote
1answer
19 views

Bind views match-client from zone delegation

i've a problem with views using Bind9. I've a Microsoft DNS server with a domain "example.com" configurated to delegate the sub-domain "ds.example.com" to Bind DNS Server. In the Bind server i've ...
23
votes
8answers
2k views

What's the maximum number of IPs a DNS A record can have?

I have a strange idea - let multiple people/organizations host the same application, and let all their nodes be accessible via a single domain name. That's in order to have, let's say, a really ...
0
votes
1answer
19 views

Redirect subdomain to an Apache Virtual Host

I have a website "example.com" hosted on a provider that allows me to manage my own DNS. I want example.com to point to the provider's IP address but I want "subdomain.example.com" to point on my own ...
-4
votes
1answer
31 views

AWS Server - holds 4 sites after DNS change 1 sites A record does not change

I have an amazon AWS server running Ubuntu. It currently holds 4 websites, and I changed the DNS for these sites at 08:00 this morning. It is now 15:30 in the afternoon, I set the TTL down to 60 ...
1
vote
3answers
1k views

Wildcard Subdomain (*.example.com) with Amazon Route53 DNS and S3

I am hosting a static website using Amazon Route53 for DNS and S3 for html files. It is working fine. Current Setup is: example.com. A ALIAS s3-website-us-east-1.amazonaws.com. www.example.com. ...
1
vote
1answer
117 views

Cleanup DHCPD leases as well as DDNS Entries

I have a fairly simple set up on a Debian server I'm running. I currently have isc-dhcp-server installed along with bind9. I set up my zone and my reverse lookup zones and set up dynamic updates, it's ...
0
votes
0answers
9 views

error creating a DNS resolver socket: Network is unreachable at /usr/share/perl5/Mail/SpamAssassin/DnsResolver.pm line 235

I'm getting lately after removing ip6 (to get KVM working) from /etc/network/interfaces the following error: error creating a DNS resolver socket: Network is unreachable at ...
0
votes
1answer
19 views

Alias (CNAME) record cannot be added to this DNS Name [duplicate]

In Microsoft DNS, I'm trying to setup a simple DNS Alias (CNAME) pointing from domain.com to www.domain.com. I also want to forward www.domain.com to a specific IP. In other words, I want to do ...
0
votes
0answers
11 views

Vestacp custome nameservers [on hold]

I am using vesta control panel, as per their documentation, i have created custom nameservers, here what i did... I have registered both nameservers using 2 different ips at my domain registrar. I ...
-3
votes
0answers
16 views

Setting up a windows server domain network and registration [on hold]

I am trying to create a domain network for my medium sized firm. I have created that successfully using windows server 2012 and joining clients to the domain, However I used a domain name that is ...
0
votes
1answer
269 views

Forward DNS requests from router

I've got a server behind a router and I'm trying to use my server as my DNS and DHCP service. I have them configured correctly, and I can connect out through, but I cannot seem to get my router to ...
3
votes
1answer
1k views

How should DNS be configured for remote VPN access to a Windows Domain?

Suppose you have a small windows domain configured as follows: domain name is ad.example.com (as per these guidelines) DC1 is at 10.10.10.3 DC2 is at 10.10.10.4 DC1 and DC2 are running the ...
-3
votes
1answer
72 views

sendmail - “host name lookup failure” but dig shows MX records [on hold]

I'm running sendmail on a CentOS 5 server. Yesterday although several emails went through, emails going to domain-co.mail.eo.outlook.com would result in "hot name lookup failure" and the emails got ...
-2
votes
0answers
19 views

Open Source IPAM with feature to automatically manage external DNS and DHCP [on hold]

Can you please suggest some open source and free software that will cover the following features for centralized management of IP addresses. Should have basic IPAM features (IPv4, IPv6, VLAN ...
2
votes
1answer
46 views

I can't get https://sendsonar.com working but sendsonar.com and https://www.sendsonar.com work just fine

I'm trying to get our domain - https://sendsonar.com - to go to https://www.sendsonar.com but for some reason this is failing. Here's the curl output: yo@ubuntu-i386:~/Sonar$ curl -kvI ...
4
votes
1answer
2k views

using wildcards in host-aliases for Tomcat's virtual hosts

I want to do the following with Tomcat 5.5: *.mydomain.com should go to my webapp, located at the virtual host mydomain.com. So I have a virtual host mydomain.com, and I want all *.mydomain.com also ...
2
votes
0answers
33 views

how to prevent loadbalancer from going offline?

i plan to setup a load balancer for a webproject but there is a major issue in my head: a typical loadbalancer would be: (provided by nginx upstream) Server #1 accepts all requests and forwards them ...
-1
votes
1answer
24 views

How to specify a DNS Slave server, that is on a different domain, in the appropriate zone file on the master naming server?

I am unsure if my question makes sense, but I am working on configuring a DNS Master/Slave setup. We currently have two domains. For privacy purposes, I will use "example" as my domain, we have ...
0
votes
0answers
20 views

DNS UDP Load Balancer - Is there X-forward-for like options? [duplicate]

We're using the Rackspace's UDP load balancer - however its only giving us internal 10.x.x.x addresses from our clients, and not the actual "external" of the external connection. On an HTTP Server I ...
4
votes
2answers
422 views

Domain name change with minimum seo impact

I am owner of an existing (3 yr. old) domain http://www.22shrutiharmonium.com and my website appears at the top of the search results in case of some search phrases like "22 shruti" , "22 shruti ...
0
votes
3answers
88 views

Cant access site intermittently, site not available

I have a news site I check stuff for regularly.. Once in a while I can't access it completely from my 5 different browsers and even from the command line, nslookup cant resolve, ping and tracert ...
1
vote
2answers
1k views

DNS resolution on Windows Server 2012 running Hyper-V

The problem shows as follows: Ping hostname <-- the host answers, it seems like the resolve is done over netbios nslookup hostname <-- hostname wasn't found by UnKnown: No response from ...
1
vote
1answer
46 views

DNS errors from certain locations, but not all

When any subdomain of thenifty.me is loaded, users cannot access it from certain locations (Canada, Ukraine, or even certain locations in US). Chrome reports: The server at *.thenifty.me can't be ...
1
vote
2answers
87 views

Website not visible from only 1 office

Small website for our company is visible from every location except from computers in our office. Ive ruled out everything I can think of, including : Firewall. m0m0wall, very basic straightforward ...
-6
votes
0answers
36 views

Domain dns response [on hold]

I have enom account They are my domain registrar Last time i had problem with my account They freezed my account and i sorted out my problem then they were reactivated my account But when i ...
1
vote
0answers
28 views

Prevent postfix appending search domain

I have postfix running on OpenBSD, and I'm having trouble with it appending a search domain when none is configured in either postfix or the local DNS server (dnsmasq). My domain has a wildcard CNAME ...
0
votes
1answer
955 views

How to give Domain Name to IPs in an Intranet Network

I Know this is a Common topic here but I'm still confused. I have a Windows Server 2003 DHCP/App Server Machine with DNS configured. The Clients are Lubuntu 12.04 Systems. I want to host my PHP ...
2
votes
1answer
132 views

Mysite getting too slow due to dns lookup

When I'm loading my site, its getting too slow and its mainly because of slow dnslookup. It hardly taking 28.77s to load the site. My site is hosted on godaddy. Do anyone have any idea to speed up ...
0
votes
0answers
3 views

Why does nslookup for espn.com give an IP that goes to go.com? [migrated]

If I do an nslookup on espn.com, an IP is returned 199.181.132.250. When I put this value in the browser I get go.com. If I had add a 'Host header to the request, I still end up on go.com. What am I ...
1
vote
1answer
646 views

Registering DNS entries from remote sites

I have a central office with a domain controller with DNS installed. Any computers at that office are on the same subnet (10.1.32.x) update their DNS entries correctly. DHCP is handled in that office ...
-2
votes
1answer
198 views

I see my full site at another domain [duplicate]

Today I found one of my website fully being displayed at another domain that is not mine. Is this some kind of DNS hack or what is the purpose of these actions ? Because I seen this before, few years ...
3
votes
7answers
12k views

How to setup equivalent USVIDEO.ORG DNS-Proxy on Linux

I have a VPS in the USA running Ubuntu. I want to setup something similar to http://www.usvideo.org Basically, USVIDEO is a DNS service that allows Canadians to access American content like Hulu, ...
1
vote
3answers
1k views

Sonicwall NSA2400 - No internet access

We've got a SonicWall NSA2400 configured with a LAN (X0) and a WAN(X1) interface. It was setup and working fine until just recently when a temporary worker changed some settings most likely NAT. We ...
0
votes
0answers
16 views

Exim mail not signing DKIM. Don't find whats wrong. (detailed description of steps taken)

I'd like to setup my fresh server (ubuntu) for hosting my www.bolleboos.be website and enable sending of email from my php scripts. So... I installed apache, php, mysql, ... and for the mail exim4 ...
1
vote
2answers
1k views

apt-get : trying to resolve ipv6

My problem is that when I do an apt-get update is trying to resolve ipv6 ips, and its failing to update/install/etc. How to disable ipv6 at apt-get? The ping to www.google.com.ar, resolves to an ...
0
votes
1answer
21 views

Set MX records on a CNAME domain (heroku app)

I have a heroku app on a subdomain like x.herokuapp.com which is mapped to my domain name via a CNAME record. I want emails to be handled by zohomail so I've tried setting up MX records but these seem ...
15
votes
4answers
14k views

How to test DNS glue record?

Hello I have just set up a DNS server for my domain example.org with 2 name servers ns1.example.org and ns2.example.org. I have attempted to set up a glue record for ns1 and ns2 at my registrar. It ...
-2
votes
0answers
15 views

How to make my hime network discoverable? [closed]

I setup a DNS server and I want to make it publicly available but my router is not reachable from other networks Dlink 2560, NAT is on and port 53 is forwarded
3
votes
3answers
292 views

Is there a way to programatically update DNS records?

Is there a standard way to programatically update DNS records? Services like Route 53 do offer programmatic access, but is that possible in a generic way using some standard protocol? Or it depends on ...
2
votes
4answers
70 views

Multiple domains (with & without www prefix) on same server, running the same code

We've inherited the following website setup: one main website and around 130 secondary websites, which all point to the main website domain (through a CNAME DNS setup); Website is hosted on an IIS 6 ...
3
votes
2answers
172 views

Do CDN providers run their own DNS servers?

In order to have efficient CDN, it needs to direct requests to the server nearest to the requester. How do they do that? Do they run their own DNS server that, when asked to resolve an address, it ...
5
votes
4answers
7k 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 ...
0
votes
1answer
2k views

Can ping and browse IP, FQDN, and hostname but can't browse via SMB to hostname of server

Got a strange problem where on a server 2008 machine I am trying to browse to another server 2008's shares on a different site. I can ping the server's ip address fine, I can ping the servername ...
1
vote
2answers
35 views

Dnsmasq: Redirect entire domain to localhost only for specific MAC Addresses

I'd like to redirect example.com to the local host, but only for specific MAC addresses. Obviously, specifying address=/example.com/127.0.0.1 in dnsmasq.conf does this for everyone. Is there any ...
0
votes
2answers
2k views

NSLOOKUP returning my domain appended to non-authoritative answer, along with wrong address

I recently installed a Windows 2008r2 server (workgroup only, no AD or Domain). This server has DNS enabled. From a different client machine on the LAN, I run NSLOOKUP to test DNS operation. When ...
3
votes
1answer
227 views

How would you setup a up an A record for any negative query?

How would I go about setting up an A record for in Bind9 for any negative queries? I want to forward our staff to an informational page if they were to visit a non existent domain. We have an internal ...