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

learn more… | top users | synonyms (1)

0
votes
0answers
3 views

Bind: Disabling DNS forwarder won't block resolving out-of-network names

I have disabled my local network DNS forwarder. But somehow internet names are still get resolved. Any idea how to stop this from happening?
0
votes
0answers
9 views

Why do you need the awverify CNAME record for Azure?

See i.e.: How to set up CNAME to point to Azure or the text within the azure portal: Why is this necessary in the first place? How does pointing the domain name through an A record not prove that ...
2
votes
0answers
17 views

Is worrying about too many CNAMEs a micro optimization?

We have a whitelabel platform and I'm thinking about making one of my 'lower' domain names an A record instead of a CNAME, because I'm worried about too many cname redirects. The whole stack would be ...
2
votes
2answers
17 views

Does a client cache the IP of a CNAME DNS request or the other domain?

I am contemplating using two different DNS hosts and am curious as to how a client system would cache the CNAME record. The reason I am going this route is that a primary domain that I would like to ...
0
votes
0answers
19 views

Locked DNS settings on Netgear CG3700

I’m trying to use a specific DNS server with the Netgear CG3700EMR-1CMNDS modem/router. I was able to do so using this exact same hardware a few months ago, so it is possible that an update may have ...
1
vote
0answers
25 views

Domain Controller unable to authenticate Static IP workstation/server

I have an exchange server which was on a static IP (192.168.10.3) previously, failed to communicate with my all-in-one domain controller (192.168.10.2) out of a sudden. The only way to get it working ...
1
vote
1answer
13 views

Debian, DKIM and Exim4 never returns public key

i wanted to use DKIM in an exam mailserver on debian. My DNS settings are: @ IN TXT "v=spf1 mx -all" 27564764._domainkey.example.com IN TXT "v=DKIM1; k=rsa; ...
1
vote
2answers
39 views

Windows Server 2012 DNS forwarding

I have a problem while setting up DNS forwarding in Windows 2012 Server R2. The local network two AD servers running DNS servers at 192.168.0.10 (AD1) and 192.168.0.11 (AD2). Both DNSes have ...
1
vote
1answer
34 views

What's the difference between listing nameservers in /etc/resolv.conf and /etc/network/interfaces in Ubuntu 12.04?

I am deploying Ubuntu 12.04 VM's from a template using vCenter 5.5. When I try to add nameservers using a customization specification they are added to the resolv.conf file. The VM will not use these ...
0
votes
0answers
12 views

webmin - customize zone options in clustered slave servers? [on hold]

I'm currently running BIND as authoritative-only server on a few hosts, using webmin to manage zone updates, configuration, etc. The setup is as follows: master server, running BIND and webmin, ...
0
votes
0answers
36 views

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

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 ...
-1
votes
1answer
54 views

DNS Setting for POP3 and SMTP email [on hold]

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 ...
0
votes
1answer
15 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 ...
-1
votes
1answer
34 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 ...
1
vote
1answer
23 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 ...
0
votes
0answers
14 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 ...
0
votes
0answers
14 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 ...
1
vote
3answers
59 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 ...
0
votes
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 ...
1
vote
1answer
25 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 ...
0
votes
0answers
33 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, ...
-1
votes
1answer
16 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
votes
0answers
17 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
vote
0answers
14 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 ...
2
votes
2answers
44 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
votes
0answers
38 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 ...
3
votes
0answers
24 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
votes
1answer
29 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
votes
0answers
20 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
votes
1answer
19 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
votes
0answers
23 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
votes
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 ...
0
votes
0answers
35 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
votes
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: @ ...
-3
votes
1answer
45 views

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

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
32 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
vote
2answers
34 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
votes
2answers
385 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
votes
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 ...
-3
votes
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 ...
8
votes
3answers
226 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
49 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 ...
-1
votes
2answers
51 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; ...
-4
votes
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 ...
0
votes
0answers
32 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
vote
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
votes
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 ...
-1
votes
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 ...
-4
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 ...
-2
votes
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 ...