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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Is there a way to list all SRV DNS records associated with host plus domain using dig or some other tool?

I'd like to query DNS using dig or nslookup and have it return all of the SRV records (like udp SIP records, etc) associated with a hostname+domain. Is this possible? I know I can query individual ...
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Add STATIC DNS entries in Microsoft DNS using nsupdate

I am the Microsoft DNS admin at my company. The Linux admin is using nsupdate to add multiple DNS A and PTR records to Microsoft DNS for his servers. The records come in with a timestamp, and DNS ...
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29 views

Trying to set up Exchange 2013 server to migrate from Exchange 2010

I am attempting to configure a new Exchange 13 server to migrate from 2010. Here is what is done so far (Exchange 10 is the live server, 13 is the new one) Send/receive connectors between the 2 ...
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22 views

subdomain server IP could not be found when DNS records defined [on hold]

I have a subdomain setup on my hosting site. My main domain is hosted on the same hosting platform, with all the records setup properly. I tried setting up a subdomain through the cpanel on the site, ...
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2answers
208 views

Can I create a CAA record for all sub-domains

Our main web site uses HTTPS certificates issued by comodo. So we have two CAA records like this: @ CAA 0 issue "comodo.com" www CAA 0 issue "comodo.com" And we have ...
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20 views

Route third party domains to my AWS subdomain

I'm trying to achieve something similar to Shopify where users create an account on my website and it automatically generates a subdomain for them (e.g. store1.example.com). Users have their own ...
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I need to create a group with users local administrator policy

In our company, we did network PCs by a domain on windows server. And each PC for install any application/software needs to administrator login. We need to create a group with some specific policy, ...
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1answer
25 views

FreeIPA on Azure setup

I am trying to setup FreeIPA on Azure as 1 Server ---> 2 Clients without actually utilizing a domain name i.e. I want to use a fictitious domain name such as "example.azure.local" and still have the ...
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1answer
30 views

DNS reply to redirect client to another DNS server

I have a client which uses a DNS server (ServerA), and ServerA works fine for all domains For a specific domain though, I need to use a DNS Server (ServerB) which ServerA cannot access, but the ...
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0answers
19 views

Enable AAAA queries ubuntu 14.04

I have an old arn server with ubuntu 14.04, and I'm trying to switch it to IPv6. the stack is working so far, I get a correct global IPv6, am able to ping IPv6 addresses, and can reach my server from ...
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1answer
13 views

How can I create an SRV record with the UltraDNS or PowerDNS provider in Terraform?

I didn't see any examples of this on the internet so I thought I'd post the solution here.
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19 views

How to correctly provisions Load Balancers with Kubernetes on DigitalOcean

Recently I turned on automatic updates on a staging Kubernetes cluster, at the next available update window the nodes were updated (deleted and new ones were created) however it went one step further ...
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2answers
69 views

Bind master doesn't sync to slave

I got handed an old Bind system at work, and the zones on the master doesn't sync to the slave. I'm a noob at bind, and could really use the help. I would like all changes made on the MASTER to sync ...
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19 views

Connect Route 53 to DigitalOcean CDN

I'm using Route 53 as my DNS provider and I'd like to use DigitalOcean's CDN How would I go about routing a subdomain to a DO CDN? Would a CNAME work? cdn.mydomain.example CNAME mydospace.nyc3.cdn....
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0answers
35 views

Azure enable HTTPS on naked custom domain for an end point

I am hosting a static website using the following Azure Resources: Azure Storage Account Azure CDN CDN End Points DNS Zone and my domain is purchased from GoDaddy. The implementation is very ...
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14 views

Is it possible to remove the /etc/resolv.conf file whithout dropping my internet connection? [closed]

Im trying to use a dns server (powerdns), but it works (my domain names are only found by the browser) when I delete the /etc/resolv.conf file, but the internet connecton drops. So is it possible to ...
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1answer
27 views

Clarification on how subdomains work in conjunction with reverse proxy URI mapping

In the settings for Squid reverse proxy, it gives examples of the kinds of URI it can map. Among these is "www.mydomain.com". Given this example domain, how would I configure DNS records with my DNS ...
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0answers
36 views

Domain CNAME to point to (A) record in sub domain

I am building a fresh AD network. So, I have followed the best practice for naming my internal domain (corp.example.com). Now, my base domain (example.com) is registered in the internet and I am the ...
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1answer
42 views

freeipa on subdomain - can't resolve A records

I just installed an freeipa server (with an master replica) for our infrastructure. For the freeipa domain I used an subdomain (of our real domain) e.g. "internal.foobar.com", and made two A records ...
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1answer
40 views

Testing transfer of slave zone from master results in connection refused

I'm using bind9 with webmin to try and set up a dns secondary for our primary nameserver. I'm in what I assume should be a very simple situation but I'm not able to get the master to transfer zones to ...
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2answers
65 views

Can a DNS TXT record break a contact form?

This may be an odd question but I'm looking for a definitive answer once and for all. I've been doing some research on TXT records and how they work, but I haven't been able to find out for sure. ...
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0answers
16 views

Delegate DNS A Record (internal and external domain is the Same)

I am the owner of an external domain, lets say "example.com". There is a little Website "www.example.com". Problem is that this is not a very professional hosting (for some other reasons) and so the ...
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2answers
48 views

Migrating application servers to new domain

I work in a corporate environment which has recently been merged with another like business. There is an ongoing project to take our legacy Windows Servers and migrate them to an entirely new Windows ...
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1answer
47 views

How to find documentation about implementing DNSSEC?

I have a question about the implementation of DNSSEC. I have a DNS Server and I want to implement DNSSEC, but I can't find documentation for this. I have a lot of confusion about this topic since ...
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2answers
40 views

How do I configure Azure DNS to forward domain requests to a server with no public IP address?

I have a domain registered through and external provider, say x.y.com, and want requests to this domain to be passed to an Azure VM with no public IP. I've created an Azure DNS resource named x.y.com ...
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0answers
26 views

One domain name, different URL redirecting request to various server [on hold]

I have a current website developed in php, url is www.example.com. Now I developed another website using Adobe. I want to redirect all request www.example.com/* to the older server but if the request ...
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1answer
31 views

DNS Forward only/proxy server responds with SERVFAIL

We have an internal DNS server 64.104.128.236 which is accessible only within a particular subnet (10.106.x.x/16). I am building a private network (192.168.x.x/16) from which I would want to resolve ...
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0answers
24 views

DNS record for my domain with different zones?

I'm setting up two DNS servers for the company, so far so good, the system is based on pfSense and bind as the DNS server. The interesting part is, checking the record from our current DNS provider, ...
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0answers
11 views

Alternative domain name and Google Search Console [migrated]

I have a mydomain.com domain that I've been using for years. Recently I purchased mydomain.it on which I applied a 301 redirect (mydomain.it -> mydomain.com). Do I have to do something on Google ...
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1answer
34 views

How to set up a reverse mapping zone for a personal domain?

I've been trying to figure out how to set up a reverse zone based on an already existing forward zone, but I keep getting an error saying server can't find xx.xxx.xx.xxx.in-addr.arpa: SERVFAIL ...
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0answers
16 views

How to join SUSE Linux to Active Directory Behind NAT

We have few servers from where we cannot access domain controller directly. So, we have one NAT (IPTABLE Linux) Server, through which we are able to interact with domain controller Domain Controller ...
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2answers
35 views

Can't configure ADDITIONAL section in a BIND 9.8 authoritative DNS server

Glue records are supposed to be configured in the registrar when the DNS server hostname belongs to the same domain. It is not exactly my case because I am setting up the DNS server for a domain '...
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1answer
226 views

Set hostname using cloudinit for dhcp server: Systemd overrides cloudinit hostname

For a testing environment, I want to connect multiple VMs using DHCP with their hostnames as DNS entrys. The troubleshooting shows that my DNS/DHCP works. But the VM got registered using ubuntu as ...
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1answer
18 views

IPv6 dynamic DNS client for Cloudflare

Is there a dynamic DNS client for Linux which can update IPv6 at Cloudflare? I have a router from my internet provider, which assigns both v4 and v6 addresses. And I'm using v6 to access my host from ...
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2answers
53 views

One domain for multiple Linux Servers

I apologize in advance if the question I'll be asking is basic or anything but I am quite a newbie on this topic. I have a main domain example.com which is used for the apache web server. Now I have ...
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1answer
31 views

Heroku Godaddy site only loading using mobile data

I have added the Heroku address using my Godaddy DNS account as a CNAME pointing to Heroku (DNS management>Records>Add). I have configured it with the name www and it uses the hostname that Heroku ...
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1answer
4k views

How can this tool find out registered domains from an IP address?

This is one that I've never really known how to do, and it's been nagging me from time to time for years. I've read all I could find, including all the answers here. None of them gives a real answer ...
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1answer
14 views

remove DNS A record from internal samba PDC DNS with samba-tool

I would like to remove one interface (eno0s3, 10.10.37.166) from samba PDC (samba 4.10) I added to my smb.conf: bind interfaces only = yes interfaces = lo enp0s8 enp0s8 is 10.21.0.2. This ...
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2answers
36 views

Kubernetes kube-dns not resolving

I am noticing an unusual high latency when trying to resolve local and external DNS lookups inside Kubernetes. nslookup requests are sometimes resolved but take on average 40 seconds to complete. ...
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1answer
26 views

Wildcards in RPZ (response policy zones)

Is it possible to have wildcards domains in the middle of a domain name using response policy zones? For example s3.*.amazonaws.com. If this is not possible, is there a technology, that can do this?
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44 views

Setting DHCP and DNS servers

This is the topology I'm working with: enter image description here I have configured the routers like this: Router_1_Mikrotik ip address add address=192.168.10.10/25 interface=ether1 add address=...
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0answers
24 views

Xenserver ports VM blocked

We lift a Xenserver 7 with 4 VMs. Since the last restart ports are blocked e.g. Prot 53 for DNS The domain controller can be reached via ping, DNS queries to the DC fail. One VM can query DNS and ...
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2answers
96 views

An unknown domain serving contents of my sites

I found that an unknown domain like www.aaa.com serving exactly the same contents (html, js ,css, any asset) of my site: myname.me. And the API as well, for example, www.aaa.com/api/user get the ...
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1answer
42 views

Working with “dual” DNS

I'm using Consul as service discovery, and I wish to add it as a DNS server with the current DNS server I have, so when I run dig ser.service.consul I will get a result from the consul. I have tried ...
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1answer
37 views

H.264 not streaming over dynamic DNS [closed]

I'm trying to view a network camera remotely so I registered with a dynamic DNS service. I can access the camera fine on the DNS associated URL and stream using MPEG but when I switch to H.264, the ...
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1answer
32 views

wildcard dns not working properly

I initially added a wildcard subdomain as below on my cpanel account and it works fine (all level of subdomain works): *.example.com but when I add following second wildcard subdomain to explicitly ...
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0answers
18 views

Direct Subdomain to a specific Port on web [duplicate]

I think this question would be best explained with some examples, so for example I have a Webserver with the IP 127.0.0.1. I now have two web applications running: One on port 80, one on Port 90. Now ...
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1answer
36 views

SPF record longer than 255 characters in AWS Route53

I saw that there's been a couple questions on here that ask the same thing. However, personally, I don't grasp the hint provided. Yes, I've seen https://kb.isc.org/docs/aa-00356 and it only made ...
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0answers
24 views

Error with https in Openshift using my own domain

I installed OpenShift on my server. I have my own domain mydomain.com. When I create a secure route (TLS Termination -> Edge) https://www.app.mydomain.com, I get an error in the browser: This site ...
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1answer
39 views

DNS records - custom imap domain URL using my domain

I want to setup a custom email imap domain name as a DNS record that points, for example, imap.mydomain.io to imap.google.com, so that I can give imap.mydomain.io url to my email customers. This is ...