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

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Managing IPv6 rDNS

Still very new to IPv6 and I talked to my datacenter and they do not do rDNS for IPv6. Unfortunately we currently do not support rDNS for IPv6 allocations. We can however delegate the IP block ...
2
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0answers
29 views

What does a healthy CNAME to an S3 web access bucket look like?

I have feed.foodschmood.com configured according to Amazon's instructions (a CNAME to one of their endpoints, which is itself a CNAME), but I'm skeptical that this is a "proper" configuration. ...
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2answers
26 views

Require help of finding issue with DNS, NAT or NS [on hold]

Before giving you the problem let me try to explain the network - Server is directory connected to a physical firewall and internet service is coming to firewall. Firewall has a static IP and from ...
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2answers
22 views

How do I secure a zone with dlv.isc.org's DLV service?

I'm setting up domain-lookaside validation. I think I got mostly everything correct. I followed the directions here: https://dlv.isc.org/about/using. I registered my domain and uploaded the key ...
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0answers
17 views

Configuration for a DNS amplification attack [on hold]

I am a Computer science graduate and was eager to learn about DNS amplification attacks.I want to set up a configuration for the attacks.I do not have zombies at my disposal and a DNS server so how ...
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0answers
17 views

windows server 2012 ping resolves every time 169.254

i have a static 192.168.1.254/24 on my windows server 2012, it's a domain controller and is a A-host DNS server_a 192.168.1.254, when i ping to server_a every time resolves 169.254.222.88 but when i ...
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0answers
20 views

Mismatch of IP Address in our linux machines?

I have few Ubuntu machines in which I have our app servers running which is trying to connect to another set of RHEL machines in which I have our Cassandra cluster running. Now as I said, my app ...
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0answers
18 views

cPanel “Addon Domain” with Route 53 [on hold]

Ok, So I've bought a domain on namecheap.com, and I've set up the DNS to point to Amazons Route 53. At that point I did not need to host any web pages. All I needed the domain for was emails. So I ...
2
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1answer
25 views

Cannot load reverse lookup zones containing “rich-text” PTR records

Summary I am attempting to set up Wide-Area Bonjour (aka DNS-SD) using ISC Bind 9.9.5, but cannot load reverse lookup zones providing discovery of "rich-text" service domains. Background According ...
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1answer
21 views

Ubuntu 14.04 Server: Use STATIC DNS servers

How can I disable DHCP nameservers in Ubuntu 14.04? I have 2 Ipv4 and 2 Ipv6 nameservers which I want to use, but resolvconf only generates a file with nameservers from my hoster because the server ...
1
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1answer
21 views

How to configure an additional BIND instance for a domain already described by other public name servers?

Background I have a small virtual server hosted by my provider and there I have configured a relatively simple combination of postfix, dovecot and roundcubemail (backed by nginx) that works OK. I ...
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1answer
24 views

Setup Windows Server Local DNS on WAN

I inherited a WAN with centrally hosted DNS,AD Servers. I have clients connecting to Application Servers hosted locally on site. Problem is when the WAN link goes down clients can't connect to ...
1
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2answers
40 views

DC keeps losing DNS record

I have multiple DC in the organization with DNS roles installed on them. One of the DCs keeps losing its DNS entry. I flushed dns cache using ipconfig /flushdns I registered the DC using ipconfig ...
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0answers
17 views
+100

Setting up sub-domains to point to a single instance Elastic Beanstalk application

I have a multi-tenant application that I've deployed to Elastic Beanstalk. Each tenant has a distinct sub-domain that they access the application from. After I deployed to Elastic Beanstalk I was able ...
-1
votes
1answer
75 views

Dig shows external configuration? [on hold]

I'm already trying for 2 days to deal with an answer for this problem. I have a virtual server somewhere and installed postfix/dovecot/mysql. It works somehow. I can login with Outlook with the ...
2
votes
1answer
57 views

Windows DNS Server Export

Is there a way or a tool that I can get a csv (or even tab delimited) list of all Forward Lookup Zone records and zones in a Windows 2008 R2 DNS Server? The DNS Server is the built-in Windows one, ...
2
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0answers
73 views

My domain controller/active directory server can't establish a connection with the global catalog

I have a Windows Server 2008 R2 running as my domain controller. It is responsible for Active Directory, DNS, and DHCP. It is the only DC in the forest. Active Directory reports errors every hour: ...
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votes
2answers
50 views

MX vs SRV records [on hold]

At first sight, it seems that MX and SRV records serve the same purpose. They both: Point a client to the name of the host the server is on Support prioritizing/fallback I'm aware that MX ...
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0answers
11 views

Cant resolve dns when has same domain of server in browser [duplicate]

i have just setup a DC running 2008 R2 my domain is tingateitsolutions.com.au and have setup my dc using that domain i just setup DNS with a forwarder to my router 192.168.1.1 and also 8.8.8.8 i ...
0
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0answers
21 views

Server migration dns doesn't resolve

I have a problem migrating accounts from one server (SERVER_1) to another new (SERVER_2). I have a domain DOMAIN_1 with some NS created on the domain provider (CDmon): ns.DOMAIN_1 pointing to ...
1
vote
1answer
35 views

Apex ANAME / ALIAS record in Windows Server 2012 R2 DNS Manager

Some DNS hosts offer a way to have an A record that serves an IP address which is determined on-the-fly (or frequently enough via scheduled job) by resolving some other hostname behind the scenes. ...
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votes
1answer
40 views

How should I configure subdomain MX / DNS entries? [duplicate]

I have domain example.com and its mx properly configured. I have also an A entry intranet.example.com which points to my CMS. What I want is to have emails of the form user@intranet.example.com and I ...
2
votes
4answers
165 views

Detecting duplicate IP address from improperly cloned virtual machines

One of our production servers was "cloned" to make a secondary test environment. The source server is a virtual machine (VMWare vSphere environment) joined to a domain and with a static IP address. ...
0
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0answers
29 views

Local DNS Server [on hold]

I am working on a tool that provides 'global virtual host/VPN' configuration for a LAN. Say I have some domain, mylan.example.com, that points to my router at home. I have a number of machines, alpha, ...
0
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1answer
35 views

gpupdate fails, access denied - event ID 1055

I became aware of this issue yesterday after pushing out GPO for Software Policy Restrictions. I am unable to push out MSI installations to certain computers. I went to look at the one of the ...
2
votes
1answer
35 views

DNS grey listing and long retry intervals - standard practices?

My company's ISP has implemented what I'll term DNS "grey listing" (or they have a configuration problem) - they are blocking inbound DNS queries between [resolver IP, server IP] pairs that haven't ...
1
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2answers
42 views

How to limit dynamic DNS updates

First off, I'm sorry if this is vague, but I'm not very familiar with DNS or DNS terminology. What I'm trying to do: I want to limit what hostnames are allowed to dynamically update DNS. I don't ...
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0answers
10 views

Multiple Emails From Different Server [closed]

I've an issue that I hope anybody here could help me. 1.I have a domain that bought from domain registrar. 2.After that, I purchase a web-hosting with email plan from other provider and have been ...
0
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0answers
18 views

Registering domain with NIC handle?

Many moons ago I was a system administrator for a small company. I vaguely remember that when I registered domains, they would be using a "handle" which I think was for me "BP897". My previous ...
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0answers
58 views

DNS Slave Unresponsive When Master Is Unavailable

I spent several months setting up what I thought was an efficient and best-practice configuration for our organization's DNS infrastructure. DNS1 - master server hosting internal zone files and ...
0
votes
1answer
34 views

Get a catch-all DNS and set a MX for a special domain

I'm trying to set a catch-all configuration with Bind. I've followed this answer and it works fine : http://serverfault.com/a/397011/179968 Now I'm trying to configure my MX record to configure my ...
2
votes
3answers
80 views

Is the Reverse PTR record fine

I've checked my email headers at http://mxtoolbox.com which says it is ok. But I'm not sure. MY server's FQDN is host.tariffplansindia.com and for my server's IP( 23.239.30.81) the reverse PTR record ...
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0answers
4 views

wget is unable to resolve host address 80% of the time [migrated]

I have a wget 'http://xxxx.net/somepage.asp?params@abc' in a bash file. When I run it, four out of five times it says: Resolving xxxx.net (xxxx.net)... failed: No address associated with hostname. ...
2
votes
1answer
18 views

bind zone file setup for dns round robin

I would like to set up load balancing for my website using DNS round robin. My DNS is managed by my own CentOS 6 server running bind. I added the following into my zone file: @ ...
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0answers
15 views

BIND providing recursion when it shouldn't [closed]

I have an installation of bind9 running on Ubuntu 12.04.5 LTS. I use this to run split DNS (pointing my internal server names to local IPs rather than external IPs). When I query an internal FQDN ...
0
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1answer
31 views

DNS issue “Nameserver cannot be queried for SOA.” - Eurodns registrar

Recently we purchased a few domains ( on EuroDNS, which we have been using for years), to use as sending domains for emails. Our ESP asked us to point them to their NS. All went smooth for .com and ...
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0answers
14 views

BIND forwarders working but not root servers

I took a system with an old version of Fedora on it and bare metal loaded Fedora 20. I used the KDE install option and then added Bind via KPACKAGEKIT. After adding a local zone it could resolve my ...
1
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1answer
49 views

Can I Deploy a batch file with Group Policy to run as administrator?

I have created a batch fill which will block Facebook by amending the hosts file in this location: C:\windows\system32\drivers\etc\hosts This is the contents of the file: @echo off echo ...
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1answer
28 views

SSL Certificate on CNAME

I have been reviewing the other posts regarding the issue, but having some trouble understanding since I've tried implementing it but still not able to figure it out. I have 2 servers. The main ...
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votes
1answer
34 views

DNS configuration for webserver path

What I have is: some vservers and some domains, located at different hosters. A webserver with Port 8081 on one server. I have a path like "123.123.123.123:8081/app/" What I want is: a subdomain ...
2
votes
1answer
58 views

DNS settings on managed switches in LAN

We have a Windows 2008 server that is connected to a managed switch with about 15 Cat5e connections and three fiber branches that go to different parts of campus. At each of these parts there is ...
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votes
1answer
32 views

DNS settings on computers and switches [duplicate]

Noob questions. I have static IPs on many of my Windows computers in our Windows 2008 domain. In the network settings at each, I have an a static IP and subnet. The default Gateway is set to our ...
0
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0answers
42 views

Internet drops out randomly for short periods of time (LAN issue)

I run a network (I'm just a math teacher) at my school. We get random 10 or so minute periods (I'd guess three a day on average) where the Internet is not accessible from within the LAN. If I go to ...
0
votes
1answer
25 views

Setting DNS TTL for an external address

To start with, I don't know jack about DNS servers. I have been stuck with resolving a problem with a DNS-Server because I discovered a problem with one of our systems and determined that it was ...
1
vote
1answer
44 views

Robust and flexible hosting of DNS A records

I'm currently working on a web platform that will be used to power lots of small websites. All of the websites will be hosted on this platform, on either a dedicated or VPS set-up. I don't want to ...
0
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0answers
12 views

geoipdns data update on the fly not working

I install geoipdns recently. It runs fine but it doesn't take new data updates correctly. Data updates should be made without restarting geoipdns, but it's not. I run the update with these steps: cp ...
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0answers
28 views

How can I redirect a domain name based on the source Region on Amazon EC2?

I have two web applications, one in Amazon's US-West-1 region and one in the US-East-1 region running on EC2. For the most part, they do the same thing, but they service different customers based on ...
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0answers
33 views

301 redirect DNS issues

I think I screwed up something in my DNS configuration and now its bugging me for hours. Any help would be greatly appreciated. I own a domain lets call it abc.com Before all the issues happened ...
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votes
1answer
22 views

windows server 2012. user creation with mapping personal and common drives [closed]

I have DellT320 for a small org of 100 users. I have instl windows server 2012 and have created 100 users in computer mgmt Users. My requirement is that i have to provide them 3 folders. 1 folder is ...
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0answers
34 views

Why does RFC 2181 disallow MX record with a CNAME exchange?

According to RFC 2181 http://tools.ietf.org/html/rfc2181#section-10.3 10.3. MX and NS records The domain name used as the value of a NS resource record, or part of the value of a MX ...