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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11 views

Accessing instances of applications with public DNS records that resolve to private IPs

I have an instance of Hashicorp Vault running on a DigitalOcean droplet. I have set up Certbot to obtain a Let's Encrypt certificate for use with TLS. The certificate is valid for use on the domain ...
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dnsmasq as local dns server

I have the following setup: box one: RHEL 7.3 NetworkManager pointing dns to /etc/resolv.conf /etc/resolv.conf pointing at the external IP of itself dnsmasq (configured by someone else) listening on ...
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No DNS resolution and Internet access from Kubernetes POD on Windows

I’ve built a cluster (v1.15.4) on hyper-v with - linux node (master) - linux node (worker) - windows node (worker) - networking - flannel (host-gw) - mac spoofing enabled for vms deployed win-...
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Missing entries in DNS Manager but OK in Server Manager DNS role view

We have 2x w2K8 Domain Controllers. DC01 and DC02. DC01 has always had scavenging enabled as far as I can see. Having run the Best Practice Analyzer on DC02 it moaned that it was not enabled and that ...
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Using private DNS

My company has a public cloud at OVH. Each server is a Debian 9 instance. I've configured the servers to be on the same private network and I would like to configure a internal DNS so that the servers ...
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My dns server not responing without my dns server ip on my local system ip [on hold]

dns server not responding but if give my dns server ip on my system preferred dns ip then its responding. by default with google dns or some dns server ip my dns server is not responding
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Why am I having wrong IPs in my DNS?

I have a certain domain I manage, which was moved to DNSmadeeasy a week ago. But sometimes when I do a dig request I get a weird IP back on the A record: 166.62.3.1 Others are reporting the same, ...
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45 views

DNS server is not working - timed out

I have 2 child controllers. But one of the controller can resolve names and the other doesn't. I can't find out the cause. Any suggestions to troubleshoot this? Edit: It seems like AD_child_02 cannot ...
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1k views

Correct DNS configuration to use Route 53 for existing domain

we are trying to make our heroku app available under example.com (changed here). I followed the heroku guide for using Route 53 for that (https://devcenter.heroku.com/articles/route-53). However, I ...
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Minecraft SRV record doesn't resolve [on hold]

I'm having some trouble getting my servers to work. My setup: A Record : *.domain.tld points to my IP address A Record : @domani.tld points to my IP address SRV Record: _minecraft._tcp.vanilla....
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Hostnames for a personal public DNS server [on hold]

Scenario I have a small website on a Windows 10 Pro N pc with (e.g.) public ip: 123.456.78 If I type in that ip from anywhere the website opens fine. Now I also bought 2 domains name e.g. www....
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What are the numbers preceeding a DNS packets flags for?

What does the Flags: 0x0500 section of this DNS query packet mean? Domain Name System (query) Transaction ID: 0x4242 Flags: 0x0500 Standard query 0... .... .... .... = Response: ...
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bind9 fails with dnssec-validation on one server but not an identical one on a different network

I'm trying to set up a recursive DNS server on a cloud-based VPS. If I set dnssec-validation no it works fine, but if I set dnssec-validation auto I get status: SERVFAIL from dig. However when I set ...
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Blocking nslookup on A record

Need to know which port to be blocked in my local machine so that the nslookup on A record doesnot work? To know the above i need to understand how the lookup on A record how does the request go from ...
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Configuring wildcard A record correctly for Gitlab server to use Gitlab pages

I have a private Gitlab instance and I want to set up gitlab pages with it. I have problems configuring my A record. According to the gl doc https://docs.gitlab.com/ee/administration/pages/ I need ...
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Named service start fails

I'm trying to set up named but I'm in trouble trying to get it up. I'm using bind-9.9.4-29.el7_2.3.x86_64 on CentOS 7.2-1511 and that's what happens when I do systemctl start named: [root@berlin ~]# ...
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AWS Route 53: How to migrate a hosted zone from one account to another completely?

I have two AWS accounts old and new. I have a hosted ZONE on old account under Route 53 service. I want to migrate it completely from old to new. How can I do it ? Are there any predefined steps ...
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DNS zone file for subdomain, query returns host not found 5(REFUSED)

I'm trying to setup subdomains on my DNS server running Yadifa 1.0.2 on Ubuntu 12.10 64bit but can't get it to work. in my yadifad.conf, my zone looks like this <zone> type ...
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Conditional Forwarding to an external doman causes Email Sending to that domain to fail

My company (@abc.com) is in the process of merging its operation with another one (@xyz.com) and both are Microsoft shops with Exchange 2010 SP3. The 2 networks are linked by an IPSEC tunnel. We set ...
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windows server 2008 dns server, set dns for specific ip

I am trying to do one thing, but fail to do so: create specific dns entry for only one FQDN. This is my scenario: I have domain xxyy.lan and dns for it. I have xxyy.com on the internet, and it has it ...
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Split DNS configuration: can't update external zone from internal system using nsupdate

I have set up a single DNS server with bind9 and a split dns configuration so that all internal requests for my domain name get the internal IP address, and all requests from outside my network get ...
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Use Linux BIND DNS server for my Windows Active Directory 2008 R2

How can I use a Linux BIND DNS server for my Windows Sever 2008 R2 Active Directory? We are trying to avoid having to use the Windows Sever 2008 Server as a Domain Controller at all. We want to use ...
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1answer
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how can I give openvpn clients access to a dns server (bind9) that is located on the same machine as the openvpn server

I currently have a debian server that is running an openvpn server. I also have a dns server (bind9) that I would like give allow access to by the connected openvpn clients, but I am unsure as of how ...
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KVM/Libvirt: How to make local DHCP leases available to local DNS server through dnsmasq

On Ubuntu 17.04 with libvirt 3.0.0 I have multiple virtual networks defined on my Server: # virsh net-list --all Name State Autostart Persistent ----------------------------...
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Email hosted by one company and HTML pages by another?

I own MyDomain.com, which I bought via Godaddy. Just today I bought some shared host with smarterasp.net so that I can host some simple webpages there. In other words, when someone goes to MyDomain....
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45 views

How can I check if a domain's mail server is hosted by me?

I do have a reseller package at TSO Host that lets me manage web hosting for other domains. At the moment I'm trying to figure out if a specific domain that once has been hosted is still sending/...
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2answers
43 views

Azure DNS is public records

I have created DNS zones for a few domains. From my PC is I go to nslookup And then do server ns1-06.azure-dns.com It connects to that server and will use for name resolution. Then when I tell it to ...
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20 views

How to properly configure Domain Delegation to send email through one domain with a FROM address of another domain

We're having some email deliverability problems and I've tracked it down to a couple of issues: SPF/DKIM records are mismatched Our app is sending mail from one domain on behalf of another without ...
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1answer
1k views

How to match PTR record with a different domain?

I am a bit confused about PTR records and how to set it up correctly. This is the current setup: A website: domain.com, on this website I have a mailaddress info@domain.com. On domain.com I have an ...
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Querying DNS for CNAMEs for a server

Is there a way to query our internal DNS entries to discover all the CNAME entries that point to a particular server? Edit: We're a Windows environment, Server 2003.
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DNS-Server-Service event ID 4011

I’ve been trying to figure out the cause of or DNS event ID 4011 errors for some time now but have had no luck and I figured I’d post about it here before I open up a Microsoft case. The error is not ...
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Bind Slave Server Notify after adding new zone

I am new to DNS Setup, i have recently setup DNS server Master and Slave using bind9. Here is my config... Master DNS - ns1.example.com. - 192.0.2.1 Slave DNS - ns2.example.com. - 192.0.2.2 named....
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4answers
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How do I prevent one IP from creating a DNS entry on a multi-homed server?

I have a Windows server that is multi-homed (it is NOT a DC). The problem is that the 2nd IP creates a DNS entry as well, which sometimes takes priority over the 1st IP. As such, when somebody tries ...
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Does changing web hosts (changing a domain's nameservers) affect the private nameservers / glue records created under that domain?

We currently have a virtual dedicated server with GoDaddy and have 4 domains under it. I ended up creating private nameservers under, say mydomain_a.com, and have ns1.mydomain_a.com and ns2.mydomain_a....
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59 views

When do I need an A-Record for an NS for a subdomain

I am trying to answer the following question: I have domain example.com with a subdomain: subdomain.example.com which is realized as an own zone. I also have NS1 for example.com and NS2 as ...
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1answer
1k views

Transparent Proxy or VPN that listens on all ports

I'd like traffic to be routed via a proxy or VPN based on a the client's hosts file (or DNS that is given to the client). This doesn't seem like a problem for http traffic on port 80 as a simple ...
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1answer
39 views

How to setup DNS registration on CentOS 7 for IPv6

I have CentOS7 box and would like to setup static IPv4 and dynamic IPv6. It joined to Windows domain via realmd & sssd; In the network we have radvd that adv prefixes and routes. Everything works ...
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5answers
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second nameserver in /etc/resolv.conf not picked up by wget

My resolv.conf looks like this: ; generated by /sbin/dhclient-script search mcdc nameserver 10.0.4.48 nameserver 8.8.8.8 if I do nslookup www.google.com it works nslookup www.google.com ;; Got ...
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1answer
71 views

PowerDNS Not Answering Reverse Lookup Queries

I have PowerDNS Authoritative & Recursor running on a server in my environment. When I use this node as my a DNS Server, it responds to A record queries without any issues. However, when I attempt ...
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27 views

Cannot connect to webservice inside docker container from another docker container

I have a very strange issue where I cannot connect to a webservice running inside a Docker container from another Docker container. I am using docker-compose and my setup looks like this: Nginx ...
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1answer
57 views

Exchange 2016 - Namespace cause external cannot access to OWA

I need some advise on my current configuration for exchange 2016 server. Right now, I'm having problem to access the OWA of exchange externally. Can this be caused by the design of my URL? My ...
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1answer
2k views

DNS. Non-authoritative answer. canonical name

I have a DNS understanding problem. (Using Windows AD integrated DNS, Windows 2012) I'm trying to find out why I get the reply I get. When going to "www.company.cn" I get an internal IP. But I do ...
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1answer
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AWS DNS Error - SERVFAIL

So I have followed the configuration guide provided by Amazon (http://docs.aws.amazon.com/Route53/latest/DeveloperGuide/CreatingNewDNS.html), but I cannot get the URL/Domain to be send out to the name ...
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Windows Firewall: allow only certain DNS servers

In my organization (which uses two network DNS servers and a local DNS resolver per laptop) I want to restrict DNS requests to only 127.0.0.1 192.168.10.201 192.168.20.2 1.1.1.1 1.0.0.1 and block ...
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598 views

How add new domains automatically using PHP script?

I am offering to my costumers a web based app hosted on dedicated servers, so clients can register on the website and use the service by using the URL : mywebsite.com/client. The service is running ...
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1answer
1k views

DNS and Active Directory configuration for a branch office

We've got a branch office with no on-site services at the moment, and we'd like to change that. The biggest goal is to setup some file servers but faster logins and DNS resolution will be welcome as ...
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If I'm using Netlify DNS servers, is there a way I can get emails to forward to a Gmail address? (for a host on Google domains) [closed]

I'm trying to use Netlify (https://www.netlify.com/) for deployment to a custom domain which has worked. But in order to do that, I've switched from Google's DNS servers (the domain is registered on ...
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1answer
33 views

How to assign external DNS name to Docker containers

How do I assign DNS names directly to my Docker containers? This is a fairly broad question so as to avoid an X/Y problem - I'll try to explain what I've done but feel free to suggest another path. ...
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7answers
27k views

Unable to ping Active Directory Server with Domain Name

Domain Controller - Windows Server 2008 R2 Standard Client OS - Window Server 2003 ( Terminal Server ) I am unable to ping my Active Directory Domain Name i.e corp.abc.com. ( Please see the print-...
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Resolve URL to 0.0.0.0 [migrated]

I'd like to use a real URL instead of localhost for local development (so I can make my development environment more similar to production, not have to remember which port is associated with which ...