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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1answer
9 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 ...
0
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0answers
6 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 ...
1
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0answers
9 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
22 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 ...
-1
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0answers
32 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 ...
2
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0answers
21 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 ...
0
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1answer
19 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 ...
0
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0answers
15 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
17 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 ...
0
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0answers
18 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 ...
2
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1answer
25 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 ...
0
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0answers
29 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 ...
0
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1answer
14 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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votes
1answer
40 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 ...
0
votes
1answer
28 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 ...
1
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1answer
23 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 ...
6
votes
2answers
367 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 ...
0
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1answer
17 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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votes
1answer
25 views

Reverse DNS error [on hold]

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 ...
7
votes
3answers
198 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
votes
1answer
45 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
48 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
25 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 ...
0
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0answers
28 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. ...
1
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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
16 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
21 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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votes
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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0answers
7 views

enquiry regarding apache, tomcat and dns stuff [closed]

Please help me guys, I've been trying to understand this for months........ I have apache httpd and I have tomcat Now my internet service provider has blocked my port 80, I figured that out today. ...
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3answers
49 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 ...
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0answers
35 views

Amazon GeoDNS (Route 53) [closed]

I own a DDoS protection company (StopDoS.xyz) I want to use Amazon's dns to route visitors to the closest location matching their requester ip address location How will this work for DDoS ...
0
votes
1answer
25 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 ...
0
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0answers
23 views

Using PowerDNS and SolusVM with cPanel DNSONLY [closed]

I currently have a cPanel server which is setup with BIND installed as a nameserver (cpanel.host.com). On 2 separate servers, I have 2 cPanel DNSONLY installs acting as nameservers, which both use ...
1
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3answers
27 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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votes
1answer
29 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
vote
1answer
87 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 ...
0
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0answers
16 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 ...
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votes
0answers
12 views

Number of DNS queries for iOS app [closed]

I'm developing an iOS app and I've read about Route53 for routing traffic to my EC2 machines. I've done some tests with the current DNS provider - GoDaddy and they don't behave as expected and I'm ...
1
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0answers
24 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
votes
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 ...
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votes
2answers
47 views

rename VM azure DNS of cloudApp [on hold]

I have installed a cloud app on Azure portal. I have to change DNS name from xyz.cloudapp.net to abc.cloudapp.net in Azure cloudapp.
0
votes
2answers
151 views

DNS for restricting youtube content

Google sent out an email to Admins stating that they were no longer supporting YouTube for Schools. Instead, they say, if we want restricted content we should: Configure Domain Name System (DNS) ...
0
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1answer
25 views

Is there a way to have Bind act as an authoritative server for a zone with incomplete records?

Sorry i don't really know how to phrase the question, perhaps let me explain the scenario. Say I own the domain xyz.com, and I'm using AWS Route 53 as my DNS. I want to have ...
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1answer
30 views

I have seperated my mailserver from my webserver and now my contact form will not send mail

I have a website (www.example.com) which is hosted with NAME.COM and I also have Exchange Email account (which uses the same domain - admin@example.com ) that is hosted with Crazy Domains I have ...
1
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2answers
58 views

Data Analysis for Spoofed DNS [closed]

A remote nameserver, that I do not have privileges on, is intermittently responding with spoofed addresses. I want to monitor this server and collect data on the spoofed responses for analysis. How ...
0
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1answer
29 views

Accessing Reverse Lookup Zone PTR records

I want to know the right command to get and delete PTR records inside the ReverseLookupZone using PowerShell. I couldn't find the right command to access the Reverse Lookup Zone. Can you guide me, ...
0
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1answer
33 views

Is a DNS Referral response always honored?

Using the DNS protocol in a man-in-the-middle service, I want to execute a friendly takeover on predefined A and CNAME records. Anything that doesn't meet the predefined criteria I would want to hand ...