The Domain Name System, usually referred to by the acronym DNS, is a hierarchical, distributed database where the keys are domain names.

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Reverse IP Lookups

When I resolve google.com I get the following ip addresses Name: google.com Addresses: 2607:f8b0:4006:80b::1006 173.194.123.6 173.194.123.0 173.194.123.8 e.t.c However ...
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Reverse Zone with Multiple Virtual Hosts (same machine)

I have two Virtual Hosts on same machine, using Apache 2: <VirtualHost *:80>ServerName house.com</VirtualHost> <VirtualHost *:80>ServerName car.com</VirtualHost> Also, I ...
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1answer
18 views

How to setup google's DNS Server (8.8.8.8) to resolve internet addresses on Windows 2012 R2? [on hold]

I'm quite new to servers. I have a simple setup : 1 server (Windows 2012 Essentials R2; Physical) and 10 clients. 1 simple router. I'd like to setup google's DNS Server (8.8.8.8) to resolve internet ...
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1answer
28 views

Redirect WAN/LAN traffic through localhost first, than continue to the internet?

Alright, for clarification, I am not trying to "Poison, MITM, Harvest or even attempt to "see what my family is doing"". Here's the deal. I've set up OpenDNS before, everyone complained because I ...
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13 views

DNS Issues connection with AT&

I run a new website called Yclas.com. I am bootstrapping the business and finally got the first paid customers but I am stuck with an issue with 2 customers from USA. This 2 customers use AT&T as ...
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38 views

How can I run a public and valid DNS server? [on hold]

I have an Ubuntu machine with public IP address. How can I run a public and valid DNS server? I want my IP address displayed in public DNS Server lists (like http://public-dns.tk/).
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11 views

VM Server not able to join domain host in another VM domain controller [on hold]

I set up two WM on my win 8 computer using VMware workstation, both running window server 2012 R2 operating system, one serves as a domain controller, DNS server and DHCP server, the other one servers ...
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8 views

Override localhost IP Adress in Windows 8.1 [migrated]

I'm trying to set up Windows 8.1 virtual machine through VirtualBox for testing a server running on my Mac (running Yosemite 10.10.3). VirtualBox sets up a the IP 10.0.2.2 to point to the host ...
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1answer
30 views

Using my private DNS from within AWS VPC via Route 53

I have an Amazon VPC connected to our corporate network. Each EC2/beanstalk (linux) instance uses the standard AWS supplied IP address for its name server in /etc/resolv.conf. Each EC2 instance can ...
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1answer
34 views

Issue with nameservers and azure

I have an existing server and domain name hosted with netlogistics. I want to use this domain name for my new server on Microsoft Azure. As far as the new server is concerned so far I have... ...
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3answers
58 views

Moving DNS and AD DS to their own servers

I have one WINDOWS SERVER 2012 running my DNS and AD DS on the same server. I am trying to move DNS to it's own server and ADDS to it's own server as well. What I have done so far is setup ADDS on ...
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1answer
35 views

Linux DNS caching for performance and safety

I am trying to figure out how to do this properly. My servers use search-domain to find the FQDN, so my code can connect using redis as the host, etc. I ran into a problem where the DNS provider for ...
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27 views

Windows DHCP Clients Randomly Revert To Old DNS Servers

In this one network I have, I am moving from a linux infrastructure to a Windows infrastructure. This has been a staged process. Originally there was no Windows infrastructure. DNS, NIS, and DHCP ...
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16 views

Compound SPF record syntax

We send transactional email from our own server and use Google Apps for email. We have the transactional server SPF set up: v=spf1 ip4:37.xxx.xx.xxx ip6:2xxx:4xd0:a:1f39::1 a mx ~all but need to ...
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2answers
24 views

How to retrieve previous IP/DNS information from Domain Controller logs?

I unfortunately have DNS scavenging on; information I need to retrieve could have been in Event Viewer DNS logs, but that's not there anymore, or maybe I am not looking for it properly. Story: I ...
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1answer
48 views

Host or domain name not found. Name service error for name= [on hold]

We have been having reports from random people who are getting bouncebacks when trying to send email to us. This is one of the most recent ones (i have tweaked the domains): Reporting-MTA: dns; ...
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1answer
43 views

Issues with delegating subdomain to AD server

I have a working authorative BIND 9.8.4-P2 server on freebsd on domain domain.com with IP 192.168.0.3 and name ns.domain.com that I did not set up on my own. It is a hidden server from which a subset ...
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1answer
29 views

Point DNS zone to local web server [on hold]

I have a DNS virtual server and a virtual web server, among others (unimportant). The FQDNs are registered as dns.example.com and web.example.com, respectively. The virtual DNS manages the ...
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51 views

What is wrong with my DNS set up?

Ok so I'm running a server on Linode (Ubuntu 14.04, Apache2) I am redirecting the domain from 1and1.com to Linode(Linked to Linode's nameservers) via HTTP redirection to the IP of my server. ...
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3 views

I need to change the URL of Tomcat Server because I want access it from other devices

Tomcat as URL uses localhost:8080. I want that URL be something like: 'www.movieuniverse..' in order to have a simple access to it without insert an address. I would want this access be possible to ...
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1answer
27 views

CentOS 6.6 and CWP - DNS

I installed the CentOS 6.6 and CWP on my second laptop, I think it is erroneous DNS information.. NS1: ns1.centos-webpanel.com | IP:185.4.149.83 [Change] NS2: ns2.centos-webpanel.com | ...
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32 views

DNS Based Load balancing on squid - odd issues

I'm attempting to do round-robin DNS based load balancing for two squid boxes running as simple HTTP(S) proxies. For testing I'm using AWS Route 53. To simulate round-robin I created two records ...
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1answer
33 views

External domain not resolving internally (split DNS)

example.com is a registered domain name. Externally, there are nameservers associated with example.com which include an A record for subdomain.example.com which points to an externally hosted web ...
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How to passthrough Wifi DNS and interenet access to DHCP client [migrated]

I have a laptop that connects to wifi for internet access. This computer is running Linux (Fedora), and it is acting as a DHCP server for another (ubuntu linaro) computer that does not have a wifi ...
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34 views

New server/domain - Setting it up with CloudFlare [closed]

I hope this is the right place to ask such a question. I've bought a domain at name.com. My nameserver settings at name.com looks like this: norm.ns.cloudflare.com dana.ns.cloudflare.com I have ...
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37 views

Webmin: restricting DNS zones visible to a user per view not working?

I'm setting up my own webmin installation to manage a BIND9 DNS authoritative server hosting a few zones. The zones are separated into 2 views: internal and public. There are different groups of ...
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2answers
70 views

Suddenly, domain name can not be resolved - What happened? [closed]

My domain is buycott.com When I run ping buycott.com in the command line, it's timing out. It's been working fine for over a year, and suddenly I'm seeing these timeouts of nowhere? When I use most ...
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41 views

L2TP + IPSec pfSense: can ping, no access

I am in process of setting up a L2TP + IPSec VPN (site to client) server based on pfSense. While being connected to the VPN, I am able to ping any of the resources (e.g google.com, as well as anybody ...
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1answer
27 views

Binding local network machines to global doman names via dnsmasq. Possible? [closed]

In my current setup, I've got a Thomson TWG870UG modem-router(internal DHCP server disabled) with a couple of home network machines connected to it via both ethernet and wlan. One of these machines ...
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17 views

options timeout doesn't work when Primary DNS server in resolv.conf fails

I currently have 2 load balanced AWS Linux box(s) which communicate to several windows web servers.These Linux servers act as a forwarder, re-direct rules etc onto these windows boxes and acts as a ...
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1answer
37 views

Reverse DNS nslookup fail

I'm having the following problem with my DNS configurations. I need to set up my reverse DNS and I don't know how. 1 - # nslookup mx.websolutions.com.ar Server: 127.0.0.1 Address: ...
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1answer
18 views

BIND DNS Forwarder Performance

Does anyone know how to measure the performance of forwarders that are configured on a BIND DNS (may be in terms of RTT, SRTT)? This will help to know which forwarders are working optimally, I tend ...
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1answer
6 views

Logging wildcard query in bind

I had setup a wildcard in my zone, and now I regret. I want to found out which name is actually in use. Any ways to log all queries that matches the wildcard in bind?
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3answers
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How does HA / failover work?

Let's say we have ten servers, each one has a copy of stateless application. user enters address in a browser / client program. dns server returns a list of ip (however many people say that dns ...
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1answer
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DB Server and Fully Qualified Domain Name

I have a hosted virtual server (Windows Server 2012 R2) that exists solely to host a few SQL databases. I need to purchase a SSL certificate to encrypt data but purchasing a certificate requires that ...
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14 views

tcpdump returns no multicast traffic when a DNS entry is being used in resolv.conf

I have noticed on a 6.5 Centos host that when I am using tcpdump to determine if a multicast source is being received/ sent that it does appear to get any results when I have a DNS registered in the ...
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31 views

Promoting Windows Server 2012 to DC, cannot create DNS delegation because SBS 2003 DNS server is not found

I'm promoting our new Windows Server 2012 Essentials box (ASH) to Domain Controller so that I can then deprecate and demote our failing Windows SBS 2003 box (PINE), which is the only current DC. ...
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1answer
25 views

Conditional forwarder for reverse zone not working

We have DNS servers hosted on our Windows domain controllers, 2012R2. Currently we have a conditional forwarder for ad.trusted-domain.com, which is working fine. We'd like to also forward PTR queries ...
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1answer
26 views

Time Between successive DNS queries.

Using a PC running Ubuntu 14.04. I'm testing web browsing using a very low speed and low data rate link. My system is congested with DNS queries (and other types of packets like TCP re-transmission). ...
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1answer
27 views

Multiple Physical (and Virtual) servers (mail, web, etc.) on single link. Can I use DDNS to use top level domains to each box? [closed]

This all started last year when I switched to a LISP based solution for my old "C" address block without the expense of T1 lines. I have a cable link and a dsl link into my Cisco 2800 that then ...
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1answer
45 views

IPv6 users see different site than IPv4 users [closed]

I had a site hosted on 1and1 that I moved to an Azure VM. I found that some people who have IPv6 enabled in their routers (not sure if that's the only situation but it's the one that I came across) ...
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1answer
30 views

Cannot access network shares by hostname over SSL VPN

I am connecting to a server at another location, I cannot access network shares by hostname (\server\share). I decided to ping the server to see if I could reach it, no luck. Pinged by IP and got a ...
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2answers
29 views

Windows DNS Migrations - new IP

So I want to add two new servers to the Domain (Currently, I only have two) so that would make it 4 (Lets call the new ones 03 and 04). However, I am eventually getting rid of the original (lets call ...
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1answer
45 views

Adding a new domain to my VPS not working (CentOS/Apache)

What I'm trying to do is to add a new domain to my VPS. So I added a new domain to my httpd.conf and updated the corresponding nameservers on my registrar. I used this code in httpd.conf file: ...
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2answers
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AWS create an alias for my EC2 instance IP

I'm not expert in anything related with networks. I've reasearched through Internet but I'm not able to get with the solution for what I need. It's simple. I've bought a domain in GoDaddy.com and ...
4
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3answers
305 views

email (Exchange) issues due to lack of RDNS

I'm one of the network operations leads for an ISP and one of our business customers is complaining his emails won't work due to our lack of a DNS server. We opted not to stand up DNS since many other ...
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1answer
36 views

Linux: nslookup and dig resolve $HOSTNAME, but ping doesn't

In our private network we have a Consul service discovery server (10.241.232.14) that provides a DNS interface (port 8600). We would like to set our common DNS servers to forward some queries to the ...
3
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1answer
58 views

How does nginx distribute traffic among IPs associated with an upstream DNS name?

With this configuration: upstream some_upstream { server some-elb.us-east-1.elb.amazonaws.com:80; } If some-elb.us-east-1.elb.amazonaws.com maps to 2 IP addresses, how will nginx distribute ...
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1answer
31 views

Redirected DNS to another DNS server

I am using Windows Server 2012, at my workplace I have done setup of a DNS server in a domain controller. Because I'm using virtual desktops. The question is, when I configure the rest of the ...
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17 views

How to redirect DNS for local domain to external IP?

In our office we have a windows based domain network, domain.com. Additionally, we have an external website hosted on Amazon Web Services hosting a website at domain.com/www.domain.com for both the ...