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

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18
votes
7answers
37k views

Can you lookup a domains past nameserver & mx record history?

If is possible to find out which nameservers a domain was previously pointing too? I need to try and find where a domain was previously hosted so that I can try and gain access to an old hosted email ...
2
votes
2answers
1k views

BIND 9.9.3 slave updates: received notify for zone 'domain': not authoritative

I am having problems with getting a zone loaded properly on a slave DNS server. Both servers are running BIND 9.9.3-P2. I am already serving ~150 zones and they are all working properly. However when ...
0
votes
1answer
1k views

Can't resolve local IP using remote dns server

I'm trying to do something I thought would be pretty simple. Mapping local.mydomain.com to 192.168.0.1 using my registrar's DNS server.(namecheap.com) I've added an A Record for local with value of ...
0
votes
4answers
301 views

How much time does it take for new A-records to start working?

I created a subdomain pointing to another IP address with an A-record about two hours ago. When I try to ping, like pinging from different locations (using online services), I get Unknown host:. The ...
3
votes
1answer
1k views

samba_dnsupdate dns_tkey_negotiategss: TKEY is unacceptable

I'm trying to configurate dinamic update to bind I have samba4.0.0rc5 running with bind 9.8 on Ubuntu 12.04. by default the provision command dont create necesary dns.keytab. i've tested with the ...
0
votes
1answer
1k views

Pageok given by puppet instead of subdomain files hosted on godaddy

I'm managing the e-commerce website for a retail store in Los Angeles, and use a subdomain hosted on GoDaddy as a fileserver to augment our Online Webstore CMS, which won't take large files (and ...
1
vote
0answers
14 views

No RRSIGs found

I had a dnssec expiration and since redoing everything, I get the following error No RRSIGs found from verisign debugging These are the exact steps I use to produce the key and signatures. What ...
1
vote
1answer
25 views

Multiple MX records pointing to multiple servers for a single domain

Is it possible to have multiple MX records pointing to multiple mail servers for a single domain? Must all mail accounts be identical on each of those servers, or is it possible to have ...
2
votes
2answers
7k views

Squid throws error, The requested URL could not be retrieved

Sometimes I am getting the following error The requested URL could not be retrieved While trying to retrieve the URL: http://groups.google.com/ The following error was encountered: Unable to ...
1
vote
0answers
20 views

504 gateway timeout when accessing by hostname, but not by IP

I'm using Amazon EC2 with Elastic Load Balancing. On my web-based application, end-users connect to app.myapp.com get a 504 gateway timeout error when performing certain operations like converting a ...
0
votes
0answers
18 views

Inconsistent DNS resolution behavior (dns_probe_finished_nxdomain)

I have a LAN with a windows server 2012 DC configured with DNS and DHCP. On occasion, clients will receive a dns_probe_finished_nxdomain error when browsing the web. This is not a consistent problem. ...
0
votes
0answers
11 views

Windows SBS 2008 - Registering remote VPN users in DNS

Our server runs Windows SBS 2008 and we're utilising Routing and Remote Access for VPN connectivity. Some of our remote VPN users have workstations which are attached to our domain. When these users ...
0
votes
2answers
1k views

Mutli-DC Environment DNS Error 4015

We recently added a new 2008 R2 DC to an existing 2003 forest with one 2003 DC. We haven't raised any functional levels. The 2003 DC was powered down (it hadn't been demoted yet, but all the FSMOs are ...
0
votes
0answers
21 views

GNU-Mailman, MS Exchange, and SPF

We are currently in the process of setting up GNU-Mailman to handle our customer mailing list. We have remote hosting (Hostgator Business Plan) for our website and for the GNU-Mailman install and we ...
2
votes
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
87 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
17 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
57 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
21 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
21 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
24 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
13 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
18 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
273 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
78 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
21 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
48 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
34 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
26 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
47 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 [closed]

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 ...
2
votes
0answers
30 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
960 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
650 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
199 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, ...