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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Why does Google Chrome automatically add www. prefix for some websites but it does not add it for others?

It adds it to my website but it does not add it to google.org for example. My website DNS records looks like the following: Host Name | IP Address/Url | Record Type | TTL @ | <server ...
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1answer
42 views

DNS Setting for POP3 and SMTP email

I'm new to server configuration, I have used rented webservers a lot, but I tried venturing myself with a VPS to run my own web/email server. All is good, I installed VestaCP to help me with dealing ...
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1answer
12 views

How to redirect one domain to the other with SSL?

I have two domains (example.com and example.co.uk). The .com one is the "head" and has servers behind him. What I want to do is redirect all traffic from the .co.uk to the .com domain. I looked at ...
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1answer
31 views

How to add new DNS entries for website

I have a registered site registerd under other Provider1 . I want to use it with Provider2 server for that I have changed mywebsites DNS at Provider1 hosting provider. second step I have create A ...
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1answer
15 views

BIND server has tons of “no valid RRSIG” errors

I have a forward-only BIND9 server running on the LAN and it logs hundreds of errors per day like: Aug 29 18:38:29 nuc named[850]: error (no valid RRSIG) resolving 'ubuntu.com/DS/IN': 75.75.75.75#53 ...
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0answers
10 views

EC2 + Cloudflare not working

[I speak Portuguese, English is not my native language - sorry for errors of writing.] I'm trying to set up Amazon EC2 with Cloudflare to more than one day. Already added all the information NS ...
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0answers
10 views

How to enforce dnsmasq to use internal dns for apex domain

We host example.com at Amazon and use Route 53 which works well outside VPN. From inside VPN we need to access to multiple internal subdomains, such as test.example.com, dev.example.com etc. which ...
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3answers
39 views

Cannot join client to domain (non virtual, DNS issue)

I'm running Windows Server 2012 R2 and have a Windows 7 Professional Laptop (non virtual, all physical) that I cannot join to the domain I created. I am trying to join the Windows 7 client to my ...
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1answer
34 views

DNS Forwarding to Google DNS - Should i be forwarding to my firewalls DNS or to googles or no forwarding at all?

While looking at some records in my firewall I noticed that I had an address that was consistently pinging googles dns servers. After checking my domain controllers I noticed they had forwarders ...
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1answer
24 views

How to link a tomcat application with ubuntu 14.04 server os on an azure server to dot tk domain?

how to link a tomcat application with ubuntu 14.04 server os on an azure server to dot tk domain? few doubts about azure vm: I can only find one DNS name e.g. abc.cloudapp.net, but dot tk DNS panel ...
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23 views

Domain email Configuration at Amazon EC2

I am using Godaddy as name registrar and also for email. I have hosting at Amazon AWS EC2. I have my domain pointing to Amazon AWS and now I can't open email using http//email.example.com, ...
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1answer
14 views

Public DNS server with dnsmasq works on LAN but not WAN (aws ec2 server)

I would like to setup a public DNS server that uses the server hosts file for certain domains, and then falls back on google's DNS for all other queries. At such, I setup dnsmasq with the following ...
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0answers
15 views

Heroku, Github Pages, and GoDaddy — Answer & Explanation Requested

I'm in a bit of an interesting situation. I have two sites that I have deployed in the last two days. The first is my personal website. I have a custom domain name for my site that is linked to my ...
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0answers
12 views

Resolve domain upon environment

I am using dnsmasq to resolve specific sites while doing some stress tasks, but since we have at least 3 environments per site I have to constantly update the target IP. These sites are behind a ...
1
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1answer
28 views

DNS not working on AD DC

I am an IT student setting up AD on a small computer lab. The lab's workstations are all connected to a switch, along with a server running Windows Server 2008 R2. I have installed AD DS and DNS on ...
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0answers
34 views

Amazon EC2 DNS resolve issue

I am using Godaddy as my Domain name registrar and I want to point my Godaddy Domain name to Amazon EC2 Instance ,I have hosting at Amazon EC2 . I am using Route 53 and I created one Hosted Zone for ...
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0answers
23 views

Will KMS clients handle CNAMEs?

Will the various KMS client versions (Windows, Office) handle CNAMEs as expected (i.e. resolve the referenced destination RRs) when resolving the _vlmcs._tcp.<localdomain> KMS machine name from ...
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1answer
25 views

Linux PCs sending “ICMP udp port unreachable” to DNS server

So digging around in my syslog I have been noticing a lot of ICMP packets being flagged by our ASAs: %ASA-4-313005: No matching connection for ICMP error message: icmp src Internet:x.x.21.122 dst ...
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0answers
18 views

Why is sendmail calling dns_getcanonname for domains of non-recipients in the To: header?

We've noticed an occasional repeatable problem in our sendmail config. The scenario is we receive a message from the internet with one of our users in the To: list, and one of the other users in the ...
0
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1answer
18 views

Sub-domain forwarding (unconditional/wildcard)

I would like to forward all requests for domain.net to domain.com. The forwarding works only for the top level URL, meaning the server redirects domain.net to domain.com. However, any and all ...
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0answers
21 views

Windows 2012 R2 - DNS resolving to internal IP

I'm currently working on my infrastructure and since now it was good. I have a Windows 2012 R2 server on AWS, with a Elastic (Public) IP. I have 3 domain: domain1.com -> point to a CPanel ...
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1answer
27 views

New Domain DC Adds FQDN (including forest) to DNS - Cant Resolve

I added a new domain recently to our AD. It was added using the option to add a new domain to an existing forest. So now we have the original domain.local which is in the forest also called ...
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34 views

Receiving DNS answers but lookups still failing

Trying to get DNS working with OpenVPN. I can reach everything fine by IP address. Client is a MacOSX, server is Linux. Running nslookup or host fails, but when watching traffic going through VPN with ...
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1answer
16 views

Why does bind allow TTL to be set record by records if different TTLs are not allowed within the same record set

Why does bind allow TTL to be set record by records if different TTLs are not allowed within the same record set? If i set the zone ttl using: $TTL 39600 And then set a record TTL using: @ ...
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1answer
41 views

Is there public dns server that serves only ipv4 adresses? [on hold]

For debug purposes I need to ensure that all hostnames resolve to ipv4 addresses. So I want to leave in /etc/resolv.conf only one dns server that will serve ipv4 only addresses. But i can't find such ...
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1answer
29 views

Updating AD DNS Records Dynamically from Excel Sheet

We have a Microsoft SBS 2011 server at work which handles DHCP and DNS for our company. We have an excel spreadsheet stored in a shared directory on the SBS itself of all the public IP addresses that ...
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2answers
32 views

New Windows 2012 R2 Server on SoftLayer - AD DS no _msdcs resource entries created

First - Many thanks to any for their support. I feel I am going slightly crazy. I have created a Virtual Machine on SoftLayer. It is Windows 2012 R2 SE. A vanilla/new install. I want this machine to ...
7
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2answers
376 views

Is it valid to have several IP addresses resolving back (PTR) to one name that doesn't match either of the relevant A records?

I have several devices, each with its own IP address. There are various names pointing to these addresses (in several different domains). As an example the device with IP address 10.0.0.1 is known ...
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1answer
18 views

DNS queries are high for non existent records. can safely do a 0.0.0.0 wildcard record?

I have a domain and i am use dnsmadeasy for the DNS. I have noticed the queries are up in the millions each month for records i don't even have. So is it okay to do a wildcard A record such as ...
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1answer
25 views

Reverse DNS error [closed]

When I run the dig command, in the out put there are some missing line such as: ;; AUTHORITY SECTION ;; ADDITIONAL SECTION $ dig ns1.anisehq.com ; <<>> DiG ...
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3answers
212 views

Workarounds for maximum DNS-Interactive terms limit exceeded in SPF record?

As a hosting provider, we send email on behalf of our clients, so we help them set up DKIM and SPF email records in their DNS to get email deliverability just right. We've been advising them to use ...
3
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1answer
48 views

Postfix: Fall back on SMTP relay that has internet access

I have a scenario where I have: Postfix server M (Stores mail) Postfix Server A (Relays mail using internet connection IA) Postfix Server B (Relays mail using internet connection IB) Internal DNS ...
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2answers
50 views

Create 2 DNS names for 2 domains on one static IP - Ubuntu

I have VPS Ubuntu 15.04 and there I have configured DNS for one of my external domains. This is sample of configuration at '/etc/bind/named.conf.local': zone "test.com" { type master; ...
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1answer
26 views

How to configure Separate Domain registrar, Web host and Email host settings? [duplicate]

Let's say we have a domain example.com Domain registrar : NAME.COM Web Host : IPAGE.COM Email Host : GMAIL (Google Apps) My understanding is that: I should add MX records to use Gmail (clear) I ...
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0answers
31 views

Firewall & DNS issue

Server: Windows Server 2008 R2 When firewall is running on the DC no machines can resolve DNS which is running on the DC. It also prevents AD user logins. It also prevents Group Policy update. ...
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1answer
29 views

LDAP & RPC Causing A/D Issues

Having an issue with authentication on my network. Running Windows Server 2008 R2 Layout: Network is a non internet connected network using DCs running DNS/AD/File Sharing. NO DHCP all addresses are ...
0
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1answer
18 views

Puppet: Error: Could not set 'file' on ensure: getaddrinfo: Name or service not known on Ubuntu 14.04 x64

I'm trying to use Puppet to deploy a server on Ubuntu 14.04 x64. I can ping the puppet server fine, and the server is set correctly in puppet.conf. Puppet can connect to the master, send its key, I ...
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0answers
23 views

how can i create an mx record with openshift and 3rd dns server (cloudflare)? [closed]

I made my site with openshift rhc, SO i need the email capability for my site (infor@example.com) So i used a 3rd party DNS server (cloudflare) So how i could make one MX email record with cloudflare ...
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0answers
22 views

Amazon Route 53 -> S3 Mask Root Alias URL [duplicate]

I'm new to DNS configurations, so please bear with me if my terminology is a bit off. I am using Amazon Route 53 for DNS to point my domain name to a static website hosted on Amazon S3. I have an A ...
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1answer
27 views

Hosted pages on custom domains [closed]

I have an online service that provides a public profile for users. Users can sign up and view their profiles at www.example.com/users-name. I want to provide a premium service where the user can ...
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0answers
15 views

Point domain to different domain's host server

I have a Hover domain, let's call it domain.com, and a Web10 (Danish hosting firm) domain and hosting solution for a different domain, let's call it host.dk. What I want is for when going to ...
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0answers
15 views

Mapping domain name to Virtualbox guest nodes [migrated]

I have read lots of post online and here about Vitualbox internal DNS. Some configured as proxy the one the host in on. So I got quickly confused. Now here is my use case I have a hostonly network ...
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votes
3answers
52 views

Becoming an ISP and hosting your own DNS servers [closed]

We are currently setting ourselves up as an ISP and need to setup our own DNS servers for hosting multiple domains. Once we have setup our DNS servers does anyone know if we need to register these ...
0
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1answer
26 views

Need to download Outlook files from webmail, no Outlook synchronization available

We recently moved our DNS from GoDaddy to our own internal server, which implies all the necessary DNS records have also changed. We had an IT guy backup all Outlook files before we changed DNS hosts ...
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3answers
29 views

OpenVPN: Assign a single URL to an IP

I have a remote server that I am connecting to via OpenVPN. The OpenVPN-Server is configured not to forward ipv4 packages, so the "internet-traffic" does not go through the server. Now I would like ...
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1answer
31 views

Active Directory DNS and Forest Root Domains [duplicate]

I am a little confused on the proper active directory configurations for the forest root domain. Recommendations call for using corp.example.com or internal.example.com. However, what is the best ...
1
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1answer
91 views

DC1 Can't See DC2 Nor Network Machines Can't See Domain

Using Windows Server 2008 R2 Found an issue with my Domain Controller 1. Setup is basic and the main domain controller is hosting AD and DNS. The secondary cannot find the primary. dcgetdcname ...
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0answers
18 views

DNS/nameserver overlay/reverse proxy

We use a 3rd party application to organize our projects. This application provides their own nameserver, the domain itself (say fooapp.com) is ours. Now we'd like to add additional subdomains to ...
1
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0answers
27 views

How can I reject mails coming from a fake domain or a fake user in a real domain?

I have an exchange server 2010 recently installed and I receive a test with 3 step to check the security of my server. below the test Check if my server receive from fake domain. Check if my server ...
0
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2answers
41 views

Host command tries several servers

I have a DNS server (pfSense) for my LAN, working perfectly, but some timeouts occur that I can't explain. Especially the "host" command gives the correct answer immediately, but then tries 2 times ...