Questions tagged [internal-dns]

DNS that is visible within your corporate network and VPN, but which is not visible on the public Internet.

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Dynamically register hostnames on DNS server (via DHCP)

I want to set up a small network, where a central DHCP server leases IPv4 addresses to the clients. The clients already have their hostnames set and should advertise those to the central DNS server, ...
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How to enumerate/scan for private dns subdomains through a VPN connection

I need to enumerate/scan a target IP address through a VPN on a private network. The target has an apache web server on port 80. No DNS server is available for the target since it is on the Hackthebox ...
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How do you resolve to both public and private zones in a Split-Horizon DNS (using GCP Cloud DNS)?

We're using GCP and Cloud DNS to manage our domain and I'm trying to solve for these use cases: Have private records for things like Databases that can only be resolved within the company network (...
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VMSS auto register with Custom DNS

We’re creating a VMSS and we use a custom DNS with extending AD from on-premises, but we are not sure how to register the VMs as the scale set scales out, in azure DNS we can create a private zone and ...
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DNS suffix works only when no subdomains are added

We have a DNS suffix for our domain ourdomain.local and it works whenever we have one additional DNS component e.g. test1.ourdomain.local or graphs.ourdomain.local, so that means we only have to type ...
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DNS Peer domain hand-off

I have a bunch of sites that all have their own independent local DNS, i also have a centralized environment that provides services for these independent sites. I don't want to centralize DNS in the &...
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Make static hostname visible via DNS (and dynamic IP)

In my local network I manage a csv file which maps MAC addresses to hostnames. This file is used to set the hostname of a client machine when it gets installed, so dynamic hostname assignment is not ...
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How I can offer a local-only domain resolution once I run docker-compose up?

I have the following docker-compose: version: "3.1" services: nginx: image: nginx networks: frontend: ipv4_address: 172.20.0.5 outgoing: ipv4_address: 172.20.1.5 ...
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Suddenly dig +nocmd pop3.pauperis.org aaaa +noall +answer returns nothing

the command dig +nocmd pop3.pauperis.org aaaa +noall +answer returns the followingin my laptop: pop3.pauperis.org. 3111 IN CNAME pauperis.org. pauperis.org. 3111 IN AAAA 2001:41d0:...
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Migrating a Terminal Server - Multiple Names

I tried migrating our Terminal Server, which is now successful. The terminal server is joined to a trusted domain and normally, we could access the terminal server from our own domain. I created an A ...
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Internal DNS with BIND, how to resolve one IP address differently?

I have an internal DNS (it is completely internal, ie. the network is not connected to Internet) for a group of networks. They are set up as follows: Each network has a different address range of 10....
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VyOS Configuration Issue

I am working on setting up a VMWare lab. I have a physical box with which I've installed ESXi 6.7 on. While I'll be adding many more, I currently have 3 vm's; a Windows 2016 Server with no server ...
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Client on network not resolving local records but using external instead

Problem When trying to access an internal server via hostnames using NSLookup, I receive the correct DNS server address, FQDN and destination IP address. When I try to access the server using its ...
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How do I get onsite DNS to communicate with Azure VNet DNS?

We have an S2S and our DNS server in Azure can talk with the Azure VNET DNS, however our onsite DNS server cannot because of a routing issue I think. What configuration do I need to change so that ...
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DHCP server not dynamic updating DNS across multiple domains

I am in the process of migrating from an old single label domain to to a new domain on a new server. I have just switched over to the DHCP server on the new domain however, computers still on the old ...
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The domain could not be found because the specified domain either not exist or could not be contacted

I have 2 Server Main Win 2016 server as Controller also DNS server the other is 2008 R2 after last update the 2008 can not find the main AD and does not log in, and on the main says the domain doesn't ...
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Enable Host Guest Domain Resuloution

Situation: I have Ubuntu 20.04 server inside Vbox6.1 with an Ubuntu 20.04 Desktop Host. Host-Guest communications are configured correctly using vboxnet0 adapter. I can readily ping the static ip of ...
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Why will Firefox resolve my domain but Chrome will not

I've been setting up a LAN DNS server using DNSMasq to forward my webserver which at the moment has https and is port-forwarded by my router. I have a domain registered which resolves fine from ...
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Can windows DNS server be configured to return a fully qualified DNS alias?

Problem We have a 3rd party web app installed on a windows server. There is an alias DNS record setup so that user can type in to a web browser the app name i.e. "testapp" and get the site. ...
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Recursive Bind DNS server working in the cloud, but not in VM

I'm using ansible to bring up an identical server in the cloud, as well as in a VM (Virtualbox) on my workstation. The instance uses a non-public-facing recursive Bind DNS server to cache queries and ...
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DNS Record to "redirect" from old server to new server

I have a question regarding DNS: I have the following setup: srv-old.example.com | Host(A) | 192.168.1.2 | timestamp srv-new.example.com | Host(A) | 192.168.1.3 | static can I just add another ...
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BIND9 - dig is unable to resolve from different server

$ named -v BIND 9.16.1-Ubuntu (Stable Release) <id:d497c32> I have 3 servers configured in digitalocean nyc1 all in the same subnet on server01 - I have installed bind9 and configured the zones ...
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How to get private Elastic-Beanstalk Environment DNS Endpoint?

My setup is the following: i have a VPC consisting of 3 subnets: public, private with NAT and isolated. I have an elastic beanstalk (single instance) environment running in the private subnet with Nat ...
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how to make unbound hold many queries for non cached address to cache it first

I am looking for a way to make unbound hold queries for the same address lookup when it is not cached. It should let only one query to be processed, after that answer cached it can reply other queries ...
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ISC DHCP/DDNS setup: Static entries for non-dhcp clients

I have set up a local network with ISC BIND9 and DHCP service. New leases trigger the DHCP to add an A and PTR record which works perfectly. I also added lots of static host entries in the dhcpd.conf. ...
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Local DNS not resolving local hostname but DIG does

I cannot figure out why this behavior. I have two pihole instances running in docker containers on 10.0.2.205 and 10.0.2.206 (sync'd). Running resolvectl status on the local pc/server results in the ...
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Windows Server DNS Server Failure

I am having some issues with Windows Server 2022's DNS resolution and was hoping to get some insights. I have included some screenshots throughout the post The server in question is running on HyperV, ...
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DNS best practice for large resilience orientated org

I have been asked to investigate the resiliency of our DNS and it's config. What's the industry best practice around this? The following have been suggested: the DNSAdmin group (which is usually ...
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internal DNS for externally managed Route 53 on Windows Server 2016

I'm trying to add a CNAME to a subdomain where the DNS for the domain is split. I'm using a CNAME because that's what the company hosting the site gave me. I've configured my external DNS with the 4 ...
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Unable to resolve private dns zone over vpn with bind9 DNS

The Problem I have a VPC in which I need to access the servers using private FQDNs. The VPC is accessible through a wireguard VPN. The VPN server also serves as a DNS server running BIND9. I have set ...
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Weird Active Directory DNS Issue

I am having a DNS issue I cannot figure out. For one specific hostname, when I create an A record, the name ends up changing when it replicates to the other DNS servers in AD. We currently have two ...
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Samba Domain Member and DNS Problems

I am trying to use my Fedora 34 workstation as a domain member but I'm having problems. First problem is that when I join the domain, I get an dns error. net ads join -U Administrator Enter ...
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1 vote
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Container DNS resolutions works only after restarting dnsmasq

[Update] add software versions I have a home server which runs docker and DNS/DHCP for my home network. It's all working quite nicely except for one thing: Containers can't do DNS resolution after ...
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Forward DNS local to Jira URL

I want to redirect my old helpdesk domain Help.company.com to Jira URL ( Company.atlassian.net/Jira/Helpdesk), it's a simple forwarding and don't want to keep the old URL . I tried to do a CNAME but ...
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OPNsense with OpenVPN: Client Domainname-Resolution with internal DNS doesn't work

I have set up an OPNSense instance and installed an OpenVPN server via it. You can see the client configuration below and it works so far. I get a successful connection via the OpenVPN-Client. The ...
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How are external url's resolved by FreeIPA?

We are running FreeIPA version 4.6.8 on Centos 7.9.2009 and have multiple dns zones defined for local resources running inside our private network. For this to work we enter our ipa server's IP ...
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Apache web page on local network accessible from iPhone and another computer on same network. Why can't I reach it from a third?

I have looked at the Similar Questions and searched on the web. Most answers are for very specific instances of Rails, or using Eclipse, or trying to access from outside the local network to a server ...
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Unbound recursive server not setting AD flag

I am running Unbound 1.9.0 as a recursive caching DNS server for a small branch office. It recurses over TLS towards cloudflare only and it has a typetransparent local-zone (example.com) overriding ...
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Why the IP cannot be used directly when the IP mapped to the host name as a host entry works?

I was given an API for a service through which I tried to send a post message from server A, but the connection cannot be built. Then I ping the domain name in the API. It doesn't work, so I thought ...
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With BIND9 - Is there a way to segment forwarders + zones in views

Beginning to think there is no clean way to do this All internal facing. Each location has it's own DNS server (70 locations) - In case their connection to the internet sd-wan is down. Each location ...
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Web browser can resolve domain name from internal DNS

Coming here from my post on stackoverflow. I have a webserver hosted on my company's VPN with a domain name, company.domain, registered in a private DNS hosted on the same VPN. When I connect to the ...
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How to get internet on Custom Created DHCP Set

I have a doubt, I am having lab setup on AWS where i have AD environment. So i have Removed the Default DHCP set and Added a new DHCP set with DNS server that i have in the test environment. Here my ...
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BIND9 DNS Issue : connection timed out; no servers could be reached from outside network

I am learning Bind9 and have setup Bind9 on Ubuntu 20.04.3 LTS Here is named.conf file options { directory "/var/cache/bind"; listen-on { any; }; listen-on port 53 { any; }; ...
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API requests delayed among docker swarm cluster's nodes & containers

In the process of migrating our docker infrastructure to a docker swarm cluster we are experiencing performance issues when containerized APIs are calling outside ressources (e.g. elasticsearch ...
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Creating a sub domain of our public domain for corporate/internal Active directory use. The public domain is also our Office 365 and Azure domain

Our current internal AD domain is example.local (set up long before I joined our team when this was a best practice) Our Office 365 domain is a public, registered domain with GoDaddy which we use for ...
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NGINX access module and internal DNS: How to allow only local clients

I searched through serverfault but couldn't find an answer to this. Maybe I just don't know the right keyword or it's a conceptual misunderstanding. Any help would be appreciated! The situation: My ...
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2 votes
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Using a Dockered Unbound DNS server as a resolver for other containers

I'm using Unbound DNS server as a resolver for my home LAN. It runs as a Docker container on the default bridge network and in general it works as I'd expect it to, except when trying to use it as a ...
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Is it possible to have both static and a dynamic A record created for the same host on an internal DNS server?

I am working on a case study related to risks from insecure dynamic DNS updates. Suppose there is an internal DNS configured that has a mix of static and dynamically created addresses. Consider a ...
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Why Firefox doesnt work with split DNS / Host Overrides?

I have configured Host overrides in pfSense and other browsers like Chrome and Edge work fine but Firefox simply does not resolve giving "Unable to connect" error. This is the same on my ...
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Obtain Let's Encrypt SSL Certificate for Internal Server on Internal DNS Server

I currently run an organization and we use a internal website that is hosted within our network that runs a Gitea Server so that we are able to access important documents without having to rely on a ...
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