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Questions tagged [domain-name-system]

The Domain Name System, usually referred to by the acronym DNS, is a hierarchical, distributed database where the keys are domain names. Questions involving publicly accessible domains should include the real, Fully Qualified Domain Name (FQDN)

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Unknown A Record in dig results

I'm very new to running my own webserver and have got a long way just reading, but i'm stuck now. I'm trying to point a subdomain to my own server and am coming up stuck. I am hosting a static front ...
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7 views

Test local DNS server on Mac OS X [on hold]

I have a local developed DNS server running on my Mac OS X on port 60053. How can I test a query for domain my-test.com on UDP 60053 locally? I've tried: host -t a my-test.com 127.0.0.1:60053 But ...
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SuSE: how to get /etc/resolv.conf updated with IPv6 name server?

I have a SuSE 11 Linux VM, it has both ipv4 and ipv6 enabled, the network this VM connecting to supports both v4 and v6. After the VM boot up, it holds both IPv4 and v6 addresses, but /etc/resolv....
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1answer
24 views

Active Directory Domain same as web domain

I am setting up a new Active Directory Forest per Microsoft's best practices here by creating a forest root domain the same as my public web site and then creating a subdomain sub.example.com. The ...
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1answer
20 views

PTR record only visible on two public name servers

I submitted a request to an ISP (CableOne) to have a PTR record created.. 160.2.202.58 mail.huntleylaw.com I've queried 30+ Public DNS servers and I've only been able to find the PTR record on two.....
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1answer
13 views

How to redirect a Heroku subdomain to an external VPS?

I have the following setup: Wordpress blog hosted on a VPS (ip: 123.44.55.66) Heroku app live at (my-app.heroku.com) Domain name bought from Namecheap (www.my-app.com) Heroku domain is already setup ...
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3answers
37 views

In postfix, what's the difference between myhostname and mydomain?

I'm trying to set up postfix for the first time. Reading the basic configuration docs, right off the bat I'm faced with two settings that I cannot understand - mydomain and myhostname. I've got the ...
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21 views

Alternative to standard DNS forwarding? [on hold]

I'll have a Windows computer that I joined to a local Intranet Domain, with their local DNS, etc... Now this computer should perform queries to an external DNS computer that belongs to another ...
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1answer
41 views

How to link godaddy domain name to google compute engine?

I have created compute engine in google cloud. After that I have create a zone with the record sets of A and CNAME using external ip of my compute engine instance. I have got some name servers by ...
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1answer
25 views

nameserver doesn't work stable

I've recently bought 2 domains from namesilo. I'm using a VPS on AWS. https://duman.digital and https://dumandigital.com Both are using the same nameservers, same settings, however dumandigital.com ...
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1answer
37 views

Redirect email to different domain

Is it possible to use the LAN DNS to redirect an email to a different domain? i.e. if I want to send emails to the domain name this.longdomainname.co.uk on a regular basis I could setup my DNS so ...
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1answer
54 views

How to delegate a whole domain to another server though CloudFlare?

I'm facing some difficulties today. I have an Italian domain name, and the Italian Authority (NIC) is very restrictive. For example, you can't have 2 NS records having the same IP address. So in fact, ...
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0answers
16 views

How to add the clients into a SUB DOMAIN DNS Linux

DNS Master is dns1.example.com DNS Master Forward zone is example.com.forward.zone SUB Domain named is suba1 & suba2 SUB Domain Forward zone is suba1.example.com.forward.zone Host Client which ...
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0answers
32 views

Yahoo Rejecting Email - dkim=temperror (multiple keys)

Sorry this is long, I wanted to provide all the information I could. We have a web based application that sends emails to people that request information. Just recently Yahoo has been rejecting our ...
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1answer
36 views

Alternatives to white listing multiple external ip in restricted network

I have a use case where at a customer site I have to instruct the customer to white list numerous external server ip addresses. Users in the company have to be able to connect to each individual ...
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1answer
35 views

How to resolve dns in multiple name servers?

resolv.conf domain example.com nameserver 192.168.122.54 nameserver 192.168.124.44 Take this as the sample resolv.conf. The scenario is that the DNS tries to resolve in the first name ...
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0answers
20 views

way of configuration for DNS SUBDOMAINS in LINUX [duplicate]

I have a below DNS configuration in Linux for SUB Domains, i have two subdomains named tony and rob under main domain padence.com I'm learning the DNS and Just would like to expert advise if the ...
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1answer
36 views

How to create DNS subdomains Linux

i'm trying to build a DNS Server with sub domains, where i have domain name padence.com and beneath that i need two more sub domains to be added like aa.padence.com and bb.padence.com . I have setup ...
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0answers
42 views

Exchange online delivery problems on DNS failure

I rephrased the whole question due to negative responses and according to John's suggestions. Now, I host a dozen of Linux mail servers for thousands of users. All hosted domains are configured with ...
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5answers
41 views

Setting a custom /etc/hosts or resolver for one process only in Linux

On Linux, I want that a particular process should resolve host "xyz.com" to IP "10.1.2.3". That's easy: just add a line to /etc/hosts. However, I only want to do this for one process; I want all ...
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1answer
28 views

Internet Explorer IP working but domain fails [closed]

When I connect to my website, duramatworkshop.com, on internet explorer; it does not work; but it does work when I browse my ip address. The domain works fine on any other browser. I have setup the ...
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1answer
18 views

Nginx Non-WWW Redirect to WWW Record Issue

I am running Nginx via an AWS ElasticBeanstalk application and have Https enabled through a load-balancer and forced Https redirect for www., but it appears that there is either an issue with my ...
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0answers
20 views

Mac administration - local reposado server for internal & external clients

I'm a relatively new Mac admin at a small (but growing) startup and I'm trying to get a few basics set up. The company has three physical sites and each site has a mix of about 5-10 iMacs and MBAs. ...
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0answers
30 views

Having trouble with NS record resolution in PowerDNS

So currently, I have PowerDNS setup with a MySQL backend, and the Recursor server in the backend to pass DNS requests that aren't in the PowerDNS zones to another DNS server. I'm having issues with ...
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1answer
17 views

How to override one entry in a bind9 view?

I have two secondary DNS servers for a zone. One of these servers, when receiving a request from a specific range should modify one of the records. In order to split the answer, I am planning to use ...
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1answer
65 views

Redirect root domain only, but keep some subdomains pointer to original root domain

I have the following config: Type Name Value A @ 192.0.2.123 A www 192.0.2.111 CNAME test @ CNAME mail @ Is it possible to temporary redirect the root domain ...
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0answers
13 views

DNS EMAIL errors in Cpanel and Cloudflare [duplicate]

I have a problem with my DNS records and cannot get an email to receive. MXtoolbox tells me DMARK is not set up but I added the records. It says I I have a problem with SMTP resolution. Cloudflare ...
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0answers
14 views

Google Cloud Functions with a naked domain as the end point?

I'm using Google Cloud DNS which doesn't offer simple naked domain to WWW subdomain redirect. I want to use Cloud Functions instead of Google App Engine to do the 301 redirects. Is this possible? ...
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0answers
20 views

Why wouldn't dnsmasq respond to a client?

I discovered recently an issue on a otherwise working server. It was updated in the past months so there may have been changed between the time when "everything was fine" and today. This server hosts ...
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1answer
52 views

MX record format without mail.domain.com

Let us say I have a domain example.com that points to IP 192.0.2.4, hence in the DNS I would see: example.com A 192.0.2.4 www.example.com CNAME example.com Now, most MX records appear to be set ...
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3answers
42 views

Azure AD DS with same domain name as external domain

We have the following setup: Office 365 on mycompany.com AWS Route 53 as the DNS server for mycompany.com Azure as the hosting provider I'm creating a new set of servers on Azure and I used Azure ...
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0answers
39 views

nmap only returns hostnames with --dns-system, but it is very slow

I'm trying to find hosts in my network, and when I try a command without --system-dns I get for instance if using -v Initiating Parallel DNS resolution of 256 hosts. at 14:10 Completed Parallel DNS ...
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2answers
29 views

Second level domain names on Heroku with Cloudflare and TLS support

I want to setup second level domain name e.g. load.staging.mydomain.com on Heroku & Cloudflare. http://load.staging.mydomain.com (without TLS) works but https://load.staging.mydomain.com does not....
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1answer
4k views

Redirect www.xxx.com URL to xxx.com on Heroku

I'm using pointDNS I have an alias: xxx.com to the xxx.herokudns.com. Now I have added a CNAME www.xxx.com and redirected it to xxx.herokudns.com (also tried xxx.com with the same result). What I ...
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0answers
68 views

How to improve speed of DNS lookups

I am new to configuring DNS servers. I have a situation where I'm setting up DNS services on a firewalled network on Solaris 5.11 machines. The old DNS setup was using Windows DNS services and I'd ...
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0answers
19 views

aws config with one domain but two instances to read from possible?

This just came into my mind and I wonder if the below is possible? I have a domain www.example.com but the client is all across Canada, would it be a good idea to have a server(including db) in both ...
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39 views

Serverless environment: Printing and authentication and between Networks connected by a Site to Site VPN

The Scenario We have a new office. We wanted no servers on this site and to use Azure for the entire infrastructure. We have a DC (10.0.0.4) at our Azure network (10.0.0.0\24) with a Site to Site VPN ...
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2answers
43 views

Setup DKIM record without server signing

I'm using on one of my domains as hosting provider 101domain. I know that they don't have a good reputation, but since I have two sites to manage and one of them has multiple ccTLDS domains I wanted ...
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1answer
37 views

Using CNAME in place of NS DNS Records

Okay, this is a slightly different question than the others that I have read regarding NS & CNAME. I am using Google Domains for domain, and a cloud service IPP for hosting. I would like to use ...
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0answers
22 views

DNS Name Server resolve error WS2012

I have a dedicated server runs on Windows Server 2012, also hosts xyz.site domain. DNS Primary Zone has two name servers as ns1.xyz.site and ns2.xyz.site, and my computer's name is "server", with dns ...
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0answers
56 views

NDJBDNS setup on Centos - Dig @127.0.0.1 times out

I'm in the process of replacing an old Gentoo DNS setup (running DJBDNS) with a CentOS 7 one, and have decided to go with NDJBDNS since it appears to be the most modern implementation of TinyDNS. ...
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0answers
18 views

DNS resolve delays with Watchguard M370 routers when single-request is disabled

After replacing our Watchguartd M200 router with a new Watchguard M370 router, we experienced delays in DNS resolving from linux clients, when packages to the DNS server are rooted via the Firewall. ...
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1answer
19 views

Cloudfront GoDaddy DNS - SSL Certificate Issues

I have a CloudFront distribution setup and working correctly. I also have an SSL certificate issued using ACM. My GoDaddy DNS has a CNAME entry for www which points to the cloudfront distribution ...
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1answer
36 views

Problems with DNS and IPv6 on Server 2012 and 2016

I manage hundreds of servers for many customers. Most are SMB segment, having 1 to 3 servers per customer max. In past few weeks I get more and more frequent DNS errors on random domain controllers, ...
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0answers
9 views

DNS Resolve with RRAS

I have a VPS running WS 2016 (not AD). I host some .net applications on the machine and machine has own DNS Server with two dedicated public IP. Everything was fine without RRAS configuration, but I ...
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1answer
21 views

Pull DNS entries from Dnsmasq to other DNS server

Background My department has a development network that is based on the idea of bringing up lots of local LANs for testing equipment in various configurations. The bridging development network ...
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0answers
19 views

AWS AmazonProvidedDNS appears to not respecting TTL - can we do anything?

We have several servers on AWS EC2 that are not obeying TTL values from DNS. Route tables are set up to us "AmazonProvidedDNS" It appears the the "AmazonProvidedDNS" limits TTL to 60 seconds. Q: Is ...
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1answer
29 views

Domain with cloudflare trough other domain

I have a domain with a provider that doesn't allow nameservers editing but i need it to be handled by cloudflare. I have another domain wich i dontuse. Is it a good idea to change the nameservers of ...
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1answer
17 views

How to set the dns on lxc containers staticly?

I am trying to set the dns manually to a lxc container. I already read your comments on [Setting up bridged LXC containers with static IPs But this did not work with me. In etc/network/interfaces ...
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0answers
14 views

adding nsec record for cname flattening

consider this zone: example.org. SOA (...) a.example.org. CNAME b b.example.org. CNAME c c.example.org. A 1.2.3.4 a query for "a.example.org. A" with DNSSEC and CNAME flattening enabled ...